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Sample Reviews of

1. 100 Greatest Rock Albums of All Time, published August of 2001
2. ALTIS ULTIMA ODAP, published August of 1993
3. CLAYTON M100 mono amplifier, published June of 2001
4. DK VS-1 Signature MK-III Integrated Amplifier by LSA Group, published May of 2006
5.
REINER: Dvorak Symphony IX and Beethoven V , published July 2007 by Richard Weiner
6. GALLO ACOUSTIC NUCLEUS REFERENCE 3 loudspeaker, published June of 2004
7. Integrated Amplifiers: Dussun DS-99, April Music Stello A1320 and NuForce IA-7 compared to the venerable Bryston B-60, published October 2006 by Marc Yun
8. PASS X350.5 power amplifier, published June 2006
9. Bob Carver SUNFIRE amplifier published, July of 1996
10. IN SEARCH OF SYNERGY, published June of 2004
11.
TOP TEN LIST: REASONS FOR THE DECLINE OF CD SALES IN 2002, published October of 2002
12. TRUTH BE TOLD by MGD -commentary on the credibility of the audio publishing industry, published December of 2003

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This review is included here because it is one that I am particularly proud of. One of the knocks on the subjectivist press is that it is technically illiterate, and not capable of discerning a bad electrical design from a good one. In this review we point out a significant electrical failing of the Sunfire, that up to that time, no other publication had found, not even the "techno babblers" at the Audio Critic. After this review, at the following CES, an employee of Sunfire (not Bob Carver) made it his job to give me a hard time over the disclosure and the review as a whole. The one thing he couldn't say was that I was wrong.

 The Sunfire by Bob Carver by MGD

Two channel transistor amplifier: $2,175. P.O. Box 1589, Snohomish, WA 98291 ph. 206.335.4748. 300 wpc 8 ohms, 600 wpc 4 ohms, 1200 wpc 2 ohms. 12 bi-polar output devices per channel. RCA inputs only. Signal Polarity non-inverted. AC wall polarity non-inverted. Push/Pull design with class AB output section. Input impedance 42,000 ohms. Two sets of speaker terminals per channel. 6" x 19" x 15" (HWD), 42 lbs. Warranty.***

 

This was my third Sunfire. I won't go into scads of info on why this is the third Sunfire in my possession for this review. But there is something that you should know before considering its purchase. Although this amplifier has been examined by a number of other audio publications before this one, including the usually meticulous Audio Critic, all of them have missed, or have chosen to ignore one startling aspect of its performance that may disqualify the amp for some AM radio oriented people. I don't know how the Audio Critic missed this as they pride themselves as being the saviors of the audio right wing, but this amplifier employs a switching power supply that runs at a very high frequency, something like the Chord amplifier from England (though in some ways very different). When an amp has such a circuit it tends to radiate energy, sometimes out of the chassis, sometimes back up the power cord into the home electrical system. In either instance it is the obligation of the manufacturer to see to it that it does not radiate energy in such a way that it interferes with the operation of other electrical gear and appliances. The Sunfire is a radio station within your home. It telecasts at 820 on the AM dial (the 3rd harmonic is my guess) and it can be picked up on all the radios in one's home. I know this to be the case as one morning I had the unique pleasure of listening to my turntable situated in the listening room through the clock radio in my bedroom when it was set to 820 AM. Of course this discovery was purely accidental as the only reason I listen to 820 is that it's WSCR Chicago, the best all sports radio station in America.

I contacted Sunfire, told them of the situation, one that they were already fully aware of, and they assured me that the problem had been remedied in production. It has, and it hasn't. Two amps later, I have the Sunfire in the Big Rig and it is still obliterating 820 on the AM dial. Fortunately, everything above and below the designated frequency still comes in rather clearly, though I have to wonder what the FCC thinks of Bob having his own army of mini jamming stations scattered across the country. (Can we somehow point them at Cuba?). But, l still don't understand how the high pride meter reader mags out there missed this one. I guess we sent them to school this time.

The circuit inside. Bob Carver is the kind of guy who fears not to spit in the eye of conventional wisdom. The man of a million innovative circuits, Bob has to be revered as one of the truly original and innovative thinkers in the industry. He's also not afraid to take on the audio establishment as his amplifier nulling tests of the 1970s and 1980s prove. And if there was a man in this industry capable of making an amplifier for the future at a price point out of the past, it is Bob Carver.

Now, I could go over the technology in the amp setting out for you the information given in the owner s manual, while regurgitating what I have read about the design in the other mags that have reviewed it prior to the final word in BFS. This not being a techno rag, let's just talk about those things that are really important as long as you don't listen to much AM radio.

The design is remarkable in that it seems to part with the norm in audio amplification theory, to wit: 1) It generates an incredible amount of power with minimal heat. In other words, it is extremely efficient. 2) It is load invariant, in that it will drive everything from the wildest Apogees to the cast iron fry pan in the sink. To which end, Bob declares that all speaker cables sound the same with this amp, he wisely recognizing that most wires don't sound different in themselves, but that the differences one hears when using different cables is the sound of the power amp reacting to the changing loads presented by the various combinations of cables and speakers. 3) The amp reacts like a true voltage source. Because of the incredible (but still noisy) power supply, this amp will double its output as impedance is cut in half all the way down to I ohm!! Which means that this amp is capable of putting out 2400 wpc momentarily into those old Apogee Scintillas you have sitting in the garage. Awesome. 4) That the amp retails for $2,175.

Set-up. It's got its own power cord attached (a short one), so that aspect of tweakery is disposed of. It would be nice if the cord were a few feet longer however. The amp comes with a nice smoked glass shelf upon which to place it. The back of the amp is somewhat unusual in that it has two sets of input jacks and two sets of speaker terminals. In itself, having two sets of speaker terminals is not all that unusual in these days of biwiring. In this case though, each set is configured so as to sound different than the other. One set of terminals is labeled "current, and the other "voltage". If you have seen the ads run by Sunfire, you know that the difference in these terminals has to do with the output impedance of each. The "current' terminals are supposed to sound like tubes due to having a higher output impedance of around one ohm (low damping factor). The 'voltage" terminals are direct coupled and are alleged to have an output impedance of about zero (very high damping factor). During my listening I stuck primarily to the zero impedance terminals for greater driver control over full range systems. Bob indicated to me that the basis for the two sets of terminals was primarily for bi-wire systems and satellite systems. The zero terminals going to the bass drivers, and the high impedance terminals to the high frequency drivers. I must admit that using the amp in this fashion was much more successful than running full range off of the high impedance terminals alone. Though for reasons psychoacoustic, or otherwise, I still preferred the zero, or, low impedance terminals most of the time. Some readers have inquired as to why Bob chose the terms "current" and "voltage" for the two types of terminals, for it would seem more logical that the terms be reversed considering that the one termed "current" is the high impedance output being driven through a I ohm resistance. The "current" terminals are after all being touted as the ones more likely to sound like tubes, but we know that tube circuits are basically voltage" based having very little current capability. You tell me?

There are also two sets of input jacks. One of these sets of jacks is labeled 'Lab", which means that the input is direct coupled and without a filtering capacitor or servo to stop the input of potentially destructive DC. If your preamp is aging, or if you are not certain that it is DC free, use the standard input. Considering the rather low input impedance, one would be well advised to use a current capable preamp, i.e. transistor or buffered tube.

The sound of Sunfire. Like the Bryston 4B ST reviewed two months ago and the Polyfusion this month, you can feel the power. But in this case even more so, as the Sunfire seems ever more eager to deliver the mega transient into any kind of load. It is explosive! Having this kind of power at hand is kind of like being on a high powered Japanese motorcycle for the first time. A real rush, as it is so easy to twist the throttle and zoom past anything in front of you - but speed kills. And too much power used unwisely can kill speakers. The temptation is to go for the high dB experience of being part of the real thing, whether it be orchestral or rock. Unfortunately, some speakers don't want to do life-like amplitude sound pressures and break. Use a steady hand on the volume control, and be leery of jack rabbit starts.

In whatever mode of operation chosen, the strength of this amp is in its lower frequencies. From the bottom note right up through the lower mids the amp has a grip on the music that is tight in terms of control, but fluid and quick in the realm of detail and responsiveness. In the mids, the control is still there, wonderfully so. The amp does a lot right in the middle range, but it was in this range that I also thought that I heard a slight loss of finesse. For example, despite the incredible power that the amp has, when the music was busy and dense, the amp didn't sort things out in the way of the Wolcott. All of the fundamentals were right for sure, but the low level stuff tended to be a little less distinct and in its place. For example, after playing the Chesky system killer (Tchaikovsky#5 and Swan Lake CD 94) through the Sunfire, and liking it I might add, I then went to the Symfonia Opus 10 power amp. The Sunfire had more sinew and drive, but the Symfonia was closer to the original performance in little ways, particularly in the mids. Both amps did a superb job on the strings at center left and right, and the Sunfire did a credible job on the trombones at right rear, very good actually. But it was the trombones that told me that the Symfonia had a bit of the super amp in its heart as the brass was big and powerful, while still maintaining a tactile presence at the right rear of the stage - they were immovable and majestic at the same time. The spacing of the presentation was minutely more precise with the Symfonia giving the music a slightly more right and relaxing aura about it. Other than that, the amps were very similar in the mids, the Sunfire holding its own in every way. Which surprised me.

I expected the Symfonia and the Bryston 4B ST to be more dimensional than the Sunfire, to round out an image with a better sense of body. They didn't. All three amps were champs in that regard. Where I did notice a difference between these three was in the amount of intertransient silence. In this area of performance the Sunfire was merely good. There was a small amount of mesh noise in the sound of the Sunfire that the other two simply didn't have. I think this is the price paid for the efficiency of the design and the use of a switching circuit in the power supply. Switching makes noise, there is no way around it short of going all out in terms of shielding and isolation that I am presently aware of. With the Bryston and the Symfonia there was more music outside of the noise realm, though again, I'm really nitpicking.

Checking out the highs revealed a crystalline clarity that allowed cymbals just the right combination of edge and bloom. The highs were able to cut through congested scores, bringing a focus to triangle, cymbal, etc., that was missing in the other amps to a degree. Another listener thought the highs to be a little forward and aggressive, though not dirty or "shishy". His preferences are for a more laid back presentation overall than are mine, and I felt that the Sunfire was merely brave enough to show the clarity of its convictions by going for the highs, and not trying to play it safe by toning down the upper frequencies. Ninety-nine percent of the time this is an advantage. I will say, however, that when the energy levels in the high frequencies on the recording became extremely excited and energized, the lack of finesse spoken of earlier became apparent to a degree in the form of some hardness. This, the Symfonia and Bryston never bespoke.

Conclusion. I hate to praise the Sunfire in this way because it's like going to the Westminster Kennel Club dog show and telling an exhibitor that their animal would make a fine pet. But I can't think of an amplifier better suited for a home theater system and a high-end system both. Its ability to drive low impedance loudspeakers in tandem, and the low frequency power that the amplifier possesses makes it the perfect companion for explosions, gunshots, etc. Which is not to sell the unit short when it comes to reproducing music. It does so with gusto and precision, not lessening the excitement of the performance in any regard. My nit is with a certain lack of delicacy and sonic refinement that will be a matter for concern only in the highest of fidelity systems.

 

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Integrated Amp
Battle Royal
by Marc Yun

BFS has officially gone integrated amp crazy. In the last few issues, MGD and Rich Weiner have taken a look at some interesting new units from the Far East. In this installment I survey three models ranging in price from $500 to $2800 each possessing a unique combination of attributes and strengths, they are: the Dussun DS99, the April Music Stello AI320 and the NuForce IA-7.

When one mentions integrateds in these pages, one must pay proper respect to the original BFS benchmark: the Bryston B-60. An MGD favorite going back to his original review a decade ago, it was a prime mover in taking integrateds to a new level of audiophile respectability.

My own experience with a B-60 several years ago was mixed. Fresh out of college I purchased a used one to go with my newly acquired Merlin TSM-SE’s. It was a nice amp but somehow didn’t do it for me, and I wound up selling it. When this new crop of integrated amps arrived, I was certain that their performance was at least on the level of, and probably better than the B-60 from yesteryear. I told this to MGD, who proceeded to dig up his original B-60 review unit to challenge my assertion. Comparisons to it were inevitable, so why leave them to pure conjecture based on fuzzy old memories? The integrated amp battle royal was on.

Some testing notes: Speakers on hand were my Merlin TSM-MX’s and Silverline Preludes, an excellent little floor-stander ($1200, review forthcoming). Source components included the Stello CDA320 CD player and a Sony C222ES SACD player modified by yours truly. In addition to the Bryston integrated, the "reference" separates for comparison were the Edge G6 and ME 550 II amplifiers driven by a MSB Gold MVC preamp. Speaker cables included JPS Ultraconductors, Synergistic Reference 10’s and of course the Lowe’s BFS special; interconnects were RWA and Silver Sonic Air Matrix. No power conditioning was employed.

Bryston B-60 Refresher

In case you’ve forgotten, the Bryston B-60 is a little gem of an integrated that’s rated at 60wpc into 8? and 100wpc into 4?. The remote control version (B-60R) retailed for around $1800 for many years, and has since been updated to the B-60 SST. I don’t have any experience with the new model, but it appears to be modestly updated, mostly on the cosmetic front, and hopefully sounds just as good. Given their stellar reputation and 20-year factory warranty, used B-60’s still command very high resale value… something that can’t be said of 99% of the flavor-of-the-month gear out there. The B-60 was meant to last, and so it has, admirably.

This isn’t meant to be a full re-review of the Bryston, just something to facilitate comparison with the current crop of newcomers. So I won’t belabor the specs or construction details. I’ll get straight to…

The Sound. Upon hooking it up, I immediately realized I had sold the old-timer short: this is still a great-sounding amp by most any measure. Next to the laser-like Edge G6 or some of the other integrateds, it’s not necessarily the most transparent or detailed, but it has a very special way of carrying you away with the pulse and emotion of the music. My fiancée, who I admit might have even sharper ears than mine, succinctly commented: "I like the way it sounds, I don’t know why… it carries the melody better, and I hear the phrasing a lot." I had to agree; it’s rich and tuneful in a way which none of the other amps, even the separates, can quite imitate. All these years later, the Bryston still sets an exalted standard of musicality. So, how will the newcomers measure up?

Dussun DS-99 - 100wpc into 8 ohms; 150wpc into 4 • THD: 0.08% @ 90W • 17" x 4.1" x 14", 22lbs; $500 • Imported by AAA Audio, LLC • 617-614-0562 • www.aaa-audio.com

The DS99 was the easily overlooked entry-level sibling of the big Dussun V6i and V8i integrateds that so impressed Rich Weiner in the last issue. At $500 it is by far the cheapest and simplest in this survey. The steel chassis is basic but sturdy, the aluminum front pane is adorned only with a large volume knob, buttons for power and input selection and a headphone jack. There is no provision for remote control.

The review unit was sourced from the amiable and gracious Ping Gong of AAA Audio, Dussun’s only factory-authorized distributor in North America. As with a lot of Chinese gear, a Google search will yield numerous outlets selling the DS99 at wildly varying prices. These gray market goods have no guarantee of being authentic Dussun products and carry no factory warranty. The biggest concern with such a product is the use of a cut-rate power transformer or converter to make the amps suitable for the 120V US market. My advice is to steer clear of such questionable sources. You get what you pay for.

Under the hood. Each of the five line-level inputs is switched using relays, a nice touch at the price point. The selected input is routed to a Alps "blue velvet" volume pot, then directly to the amplifier section - there is no active preamplifier section or preamp output, ruling out bi-amping or directly connecting active subwoofers. The amp section is a DC-coupled design with differential JFET input stage and a complementary bipolar output stage. Choice parts include polypropylene film caps, low-noise Toshiba JFETs and two pairs of Sanken output transistors per channel. I did not get a chance to measure bias current in the output stage, but the DS99 does not employ the "Hyper Class A" adaptive biasing scheme of its big brothers. The unit runs fairly warm at idle, suggesting a fairly typical Class AB setup juiced just enough to get a little Class A power at low levels. (Dussun pictured above)

Small inductors are placed near the output devices, indicating the use of a Zobel network – generally a good thing in my opinion, and something Bryston also puts in the B-60. Time-delay relays keep any pops and clicks from reaching your speakers, and the unit was perfectly silent at turn-on and turn-off – bravo. A beefy toroidal transformer feeds 32,800uF of supply capacitance. Circuit layout is clean and parts quality is excellent for the money, giving no obvious indication of cut corners despite the low asking price. From the no-nonsense chassis to the efficiently executed internals, the Dussun is all business and clearly focused on the goal at hand – no-frills music reproduction.

The Setup. A number of power cords were tried, but the Dussun wasn’t very picky. Try any decently heavy cord with good quality connectors (e.g. 14-3 with Marinco plugs) before going too nuts. Interconnects are a different matter – the Dussun proved itself more than transparent enough to reveal the superiority of the BFS-reference RWA interconnects over lesser wires, so use the best you can afford. Of the two speakers I had in house, the Silverline Preludes were a very nice match in both sound quality and budget level. The unit sent to me had been previously used, so I can’t comment on break-in time, but as with most any amp the sound continues to open up over the long haul.

The Sound. This amp is the real deal. 500 clams does not buy you an Edge or Pass killer, but it does handily cleanse your palate of the bitter taste left by mediocre mid-fi amps of the past. The Dussun’s most salient character is an open, lively quality in the midrange, with excellent detail and articulation. Rich Weiner referred to it as "fast and lithe," and I couldn’t agree more. The midrange is where most of the music is, and the Dussun is an excellent communicator in that area.

The frequency extremes complement the midrange well, if not to quite the same high standard. The treble is nicely extended, with perhaps just a tinge of brightness. Nothing major mind you; when listening to Thomas Zehetmair’s superb rendition of the Mozart violin concertos (Philharmonia Orchestra/Teldec) there’s just a bit more "steel" to his E string than is natural. The foundation of the music in the lower midrange and bass was generally good; it’s not what I would call rich, but not threadbare either. To a greater degree than the other amps, the fleshiness of the sound will depend on the specific synergy with the speaker system and setup. With the Silverline Preludes, I found that switching from JPS Ultraconductor bi-wires to the Lowe’s BFS special helped to firm things up in the bass while opening up the midrange further. It’s difficult for me to comment on the lowest reaches of the bass without having a true full-range speaker on hand, but I did get the opportunity to hear the Dussun with a pair of large Focus Audio speakers in someone else’s home, and came away very impressed with the extension and control in the bottom octaves.

Power is ample; not a hint of murkiness or obscurity of the kind one often gets with mid-fi solid state amps with triple-digit power ratings. It’s not a dynamic beast, but it has a sense of ease and control that could easily be mistaken for a high-end 150 wpc amp. Sometimes amps can be powerful in absolute terms, yet give you the impression that they’re a little twitchy or on edge. The Dussun sounds fundamentally stable and easily handled any sane listening level in my apartment. What it doesn’t do as well as the more expensive reference separates is capture the subtle dynamic pulsations, inflections and micro-explosions in the music; compared to the ME or Edge, it’s a tad flat and not as expressive.

Nits are relatively minor, and I suspect that the ones I heard related in large part to the passive nature of the Dussun’s preamp section. The soundstage is nicely focused but a bit narrow, particularly when the volume control is at a low position. It doesn’t have the width and space of the separates, nor the lateral placement and spread of the Stello. Adding the MSB preamp and cranking the Dussun’s volume to the max (essentially making it a regular amp) resulted in a more open and detailed sound with a much better sense of stage width; thus confirming my suspicions. The upper midrange has a bit of grain and roughness compared to the ME or Edge, but then those are two of the smoother, more grain-free solid state amps I’ve heard. All in all, when one considers the mass-fi price of the Dussun vs. the decidedly excellent sound quality, one can’t find a whole lot to bemoan.

Head-to-Head with the Bryston. The Dussun comes off a bit cooler and more distant than the warm-n’-cozy Bryston… listening to Mahler Symphony No. 5 (Zander/Philharmonia Orchestra, Telarc SACD), the Dusson puts you about 2/3rd of the way back in the hall, vs. 1/3rd on the Bryston. Perhaps due to its forwardness, the Bryston also tends to communicate the rhythm and pace of the music more convincingly. The Dussun’s soundstage is slightly narrower, but with a bit more air and clarity to winds and brass at the back of the stage – individual voices are a little less homogenized. Midrange completeness and richness goes to the Bryston, while bass definition and extension goes to the Dussun.

Listening to Saint-Saens Cello Concerto (Pieter Wispelwey, Channel Classics SACD), the tables turn a bit… the orchestral accompaniment which sounds a little muddy on the Bryston comes through clearer and more incisively on the Dussun. The Dussun is also slightly more detailed, revealing a bit more ambient glow around instruments. Wispelwey’s performance of the Frank Sonata transcribed for cello exhibits greater clarity with the Dussun, the piano opening sounding a bit less muddy and the cello’s lower registers coming across more distinctly from the piano’s. The bottom end of the cello also sounds a tad deeper, more articulate and more controlled, though the Bryston has a bit more warmth on the cello’s D string.

An interesting experiment was using the Dussun as an amp with the Bryston’s preamp section; the sound took on a lot of the quality of the Bryston, including some of the negatives like the loss of specificity at the back of stage, yet retained the cooler, more even character of the Dussun. Regardless, the Dussun on its own is a very fine performer that, while not quite trumping the venerable Bryston, it certainly gives it a run for its money.

April Music Stello AI320 - 140wpc into 8 ohms • THD: 0.005% @ 30W • 17" x 4.1" x 16.4", 27 lbs. MSRP $2,795 • April Music • www.aprilmusic.com

The Stello is the priciest piece in this survey, and it shows from the moment you unpack it. The brushed-aluminum chassis is classy and upscale, the neatly organized back panel revealing numerous connection options of obvious quality. The front panel has a series of stylish round buttons for the various functions and an electronic display that shows the selected input and volume level when the unit is on (or superfluously reads "STANDBY" when it’s off). In addition to four line-level RCA inputs, there’s a pair of balanced XLR inputs and a "bypass" RCA input that feeds the amplifier section directly – perfect for hooking up a separate surround sound processor in a double-duty audio/home-theater rig. RCA preamp outputs are available, and the insulated binding posts are excellent. Unlike so many posts I come across that are too chunky for 1/4" spades, the posts themselves are rectangular cut; so smaller spades will fit one way while larger ones will fit the other. The plastic knobs are easy to grip and tighten down, and the banana jacks have a nice snug fit. If only all binding posts worked this well.

All functions can be controlled via the extruded aluminum remote control, which also controls the companion CD player in the Stello line. I never cared for the Krell-style solid metal remotes that are so fashionable in the high-end – they’re heavy and awkward, can damage coffee tables and usually have poor ergonomics. Nevertheless the remote worked fine and includes a handy dimmer switch for the front-panel display. I liked the operation of the electronic volume control, which was plenty fine enough (0.5dB) yet easy to adjust quickly, and also memorized its setting for each input source. In every aspect of its operation the Stello was smooth and a pleasure to use.

Under the hood. Popping the top reveals the Stello’s beauty to be more than skin-deep. All input jacks are directly connected to a multi-layer PCB that neatly holds all preamp and power supply circuitry. A completely separate circuit board mounted behind the front panel keeps all noisy control and display circuitry well removed from the audio circuits. The relay-selected inputs are routed to a discrete transistor buffer stage with dual-differential JFET inputs, indicating a truly balanced input circuit. A Cirrus (Crystal) CS3310 IC handles electronic volume control and drives the amplifier section directly. Despite the manual claiming a DC coupled signal path, I found a 10uF film cap at the input to the amp section. The preamp and tape outputs are buffered by OPA2604 IC op-amps; note that these are only in the signal path for the external RCA outputs. Like the Dussun, the amp section is a classic JFET input/bipolar output affair, though in this case the two pairs of output devices per channel are newer Sanken devices that incorporate multiple parallel transistors into a single large package. These relatively expensive devices are known for their excellent bandwidth and power handling, and are mounted on appropriately beefy heatsinks. Muting relays protect the speakers from unpleasant hiccups during operation. Powering all this is an impressive fully shielded 800VA toroidal transformer feeding a 90,000uF capacitor bank for the amp and another 23,000uF for the preamp. The amp runs warm at idle and could get toasty in operation, but never burning hot. The IEC power input module appears to include AC line filtering. Parts quality and build quality are top-notch.

The Setup. This amp deserves better than the stock 18-3 cord, and the always-reliable Audience PowerChord proved up to the task. The Silverline Prelude was used for the majority of listening (as is typical with most solid state amps, the Merlin TSM’s were not a good match). Other than that, the Stello was pretty much as plug-and-play as they get. Though I had a balanced CD player on hand (the Stello CDA320), I did not have a chance to test the XLR input, which is unfortunate –unlike so many XLR connections that are not fully differential or use IC op-amps to convert to and from single-ended, both the CD player and integrated implement truly balanced discrete circuits. As with the Dussun, the review unit was previously used, so break-in time could not be ascertained.

The Sound. Of all the amps in the survey, the Stello had the least personality. That’s meant neither as an indictment nor a commendation per se; but at the end of the day, that’s just how it came across. Tonally it’s well fleshed-out, with more weight than the Dussun and bit more lower-midrange heft than the MSB/ME or MSB/Edge combos, but less warmth than the Bryston. It’s also a tad less bright than the Dussun, with a less prominent upper midrange, though there was still some steeliness to Zehetmair’s E string in the Mozart concertos. At the same time, it has a slightly "flatter" quality than either the lithe Dussun, the lively Bryston or the more transparent separates… there’s nothing unduly electronic or artificial about it, it just comes across as a bit more reticent than the others.

Detail-wise it does a good job of capturing the general ambience of a concert hall, if not the "air" of each individual instrument - the varying ambient colors from different sections of an orchestral stage sound a little homogenized. Dynamics have a similar quality, with subtle inflections being glossed over; in musical terms, there’s a sort of mezzo-forte and sostenuto quality to the sound which makes things sound a little uniform vs. the more varied dynamic palette of the reference separates. Normally these are things MGD and I would ascribe to the sound of IC op-amps… in this case, the culprit could very well be the Crystal volume control IC, which has internal op-amps. To test this theory, I tried using the "direct" amp input on the Stello with the MSB preamp. The result was a lighter, more open and detailed sound, with a sense of agility and clarity missing when using the internal preamp. The downside was that it was tonally a bit too light, and in the end I found the internal preamp to be a better match overall.

In fairness, I might be erring on the overly critical side, because this is good-sounding amp with plenty of clean power. Britten Suites for solo cello (Wispelwey, Channel Classics) sounded remarkably life-like on the Silverline Preludes, the cello having spot-on tone quality and a perfect balance of body and texture. Of all the integrateds, the Stello sounded the most open and at ease when playing the Britten at realistic volume levels; in this respect it was very much a match for the reference separates.

Head-to-Head with the Bryston. Switching from the Stello to the Bryston immediately reveals the latter’s superb tactile qualities and richness of images. The Stello has a dryer midrange that’s just a hair tizzy in the transition area to the treble. Images in center stage are a tad defuse; listening to Wispelwey’s Frank Sonata, piano and cello seem a bit unfocused. On the plus side, its lower midrange is less congested than the Bryston’s, and its presentation will appeal to those who prefer a bit more delicacy and subtlety. With more than double the power, it also possesses far more dynamic headroom. Though the Bryston is good for all of its rated 60 watts (and maybe more), the beefier power supply and output section of the Stello will keep on cranking long after Bryston has run out of steam. At the same time, the Stello has a more subdued sense of rhythm, and comes across less vibrant and alive than the Bryston. Still, there will no doubt be those who prefer the Stello’s even-keeled demeanor and ample power.

NuForce IA-7

50wpc max, damping factor > 4000 • THD: 0.05% @ 10W • 8.5" x 1.75" x 16", 
6 lbs.
MSRP $1195 • www.nuforce.com

Looking more like a car stereo amp than a home hi-fi component, the NuForce is the lone Class D amp of the bunch, and also the quirkiest. Perusing the manual reveals numerous ominous warnings. "WARNING! Do not connect NuForce outputs to the line-level inputs of active devices such as active subwoofers…" "WARNING! Use only grounded AC power cords." "Always immediately disconnect the power to the equipment in the event the devices emits an unusual odor or sound or generates smoke." Yikes… sounds more like one of my hacked-together DIY projects than a mature consumer product. As is common with many switching amps, the speaker outputs are not referenced to ground and can become unstable with no load, so much care must be exercised during setup. During everyday use a lot of clicks and pops can be heard through the speakers, further reinforcing the dread of a catastrophic explosion or similar audio meltdown. In contrast to the elegant and refined Stello, the NuForce was less than confidence-inspiring in its operation.

The back panel has two pairs of RCA inputs and two stereo mini-plug inputs for iPods or what not, along with a pair of preamp outputs. A "booster" switch allows one to turn off the amplifier section. The insulated binding posts are par for the course and necessary to meet EU safety regulations. The front panel has two knobs which electronically control input and volume. Pressing in the input knob turns the unit on and off, while pressing the volume knob activates the mute function. The volume control was a nightmare to use – each detent of the knob makes an absolutely infinitesimal change in volume level, thus requiring many turns to effect any major change in level. The small full-function remote control had the same issue; one needs to hold down the volume control buttons for what seems like an eternity before the volume level changes significantly. Even with my best video game button-mashing technique I would still find myself pumping the button endlessly. This is something that definitely needs to be fixed in firmware.

So how does it work? First, a little primer on "Class D" switching amplifiers. A traditional linear amplifier, usually of the Class A or Class AB variety, attempts to preserve the signal in its original form from input to output, only higher in power level – the "straight wire with gain" concept. In contrast, Class D amplifiers generate a high power pulse signal at a frequency many times the intended bandwidth (usually at least a couple hundred kilohertz.) and modulate it with the input signal in a technique called pulse width modulation (PWM). By passing that modulated pulse through a low-pass filter, the original waveform is magically reconstructed.

Okay, that doesn’t sound very intuitive, so let me present a rough analogy. Let’s say you’re trying to drive a car on the highway. A linear amplifier would be akin to the way we normally drive – the car has an infinitely adjustable throttle control in the form of a gas pedal, and you put your foot on it a certain amount to get to the desired speed. You adjust your foot pressure based on what the speedometer says in a form of negative feedback – just like in an amplifier. A Class D amp on the other hand would be like a car that had only an on-off throttle switch in place of the gas pedal, and some kid on ten shots of espresso at the wheel. Since the kid can’t fine-tune the throttle, he has to selectively pump the throttle switch between on and off, watching the speedometer to tell if he’s under or over the desired speed. How in the world will he ever maintain a steady 55 mph? Well, the car has inertia – turn on the throttle, and it takes time for the car to reach top speed; turn off the throttle and the car gradually cruises to a stop. This is the function of the low-pass filter in a Class D amplifier; it creates "inertia" in the signal and integrates the high-speed pulses into a relatively smooth output. In this fashion and with some skill (a high-enough switching speed and conscientious speedometer reading), one can actually control the speed of the car with great precision.

This is basically how PWM works, and it’s employed in everything from Class D amps to 1-bit D/A converters to the motorized arm of the robot that welded the door of your Ford Explorer together. But I digress... why exactly would one bother with this convoluted amplification scheme? Because transistors are intrinsically non-linear devices that are more efficient when used as on/off switches rather than linear amplifiers. Class D amps that also employ switching power supplies often boast power efficiency ratings of 80% or higher; compare that to the typical Class A brutes that MGD so loves, which are constantly burning off hundreds of watts of heat even when delivering just fractions of a watt to the speakers. Class D’s efficiency gives it obvious cost, size and weight benefits.

A common misconception is that the "D" in Class D means "digital," thus implying some sort of conversion of the input signal to the digital domain. This is only true of Class D designs that employ a digital pulse modulator, such as TI’s "PurePath" technology commonly used in home theater receivers. The analog approach preferred in audiophile circles is to use an oscillator as the pulse source, modulated with an appropriate comparator circuit and with negative feedback applied to smooth out frequency response errors and distortion. Class D implementations that fall into this category include the NuForce, analog ICEPower modules from B&O and the Hypex UcD modules. Tripath’s "Class T" chips popularized by the $30 Sonic Frontier T-amp are a bit of a hybrid, using both analog and digital signal processing techniques to generate a spread-spectrum pulse modulation.

A big problem with Class D is radiated high frequency noise. Because of the output transistors rapidly switching at full power, the entire amplifier can become an RFI nightmare, spewing all kinds of nasty harmonics into the gigahertz range. Another challenge is ensuring linearity and flat frequency response into the complex load presented by a typical speaker. Fine-tuning the modulation scheme, low-pass reconstruction filter and feedback loop into a single stable, linear and consistent system is a challenge, and as with any technology that hasn’t fully matured, designers are still learning the art of making it all sound good. Early examples of Class D were pretty hard on the ears and relegated to car stereos and active subwoofers, but the technology has clearly made large strides towards audiophile legitimacy in the last several years… whether it’s truly ready to challenge the finest traditional amps is still questionable, but just as with digital audio in the 90’s, Class D is rapidly gaining ground.

Under the hood. Unlike many companies which repackage existing Class D solutions, NuForce employs their own fully-analog implementation. The slim extruded aluminum chassis is absolutely jam-packed with circuitry, most of it looking nothing like your typical audio component. The preamp section uses the ubiquitous NE5532 op-amp in surface-mount form. (Before you write off the much-maligned ‘5532, keep in mind it is still used extensively in some pretty good-sounding products like the Benchmark DAC-1.) The 16-pin volume control IC has been stripped of its part number and covered with a NuForce sticker; my best guess is a Burr-Brown PGA2311 or similar part. The preamp is connected to the amp module using several inches of spaghetti-thick coax wire. The amp front-end also uses NE5532 op-amps, along with LM319 comparators and a Xilinx FPGA. The output stage uses a Harris HIP4081 FET driver IC operating off a single supply and feeding four small power MOSFETs in a full bridged (push-pull) configuration. Both speaker terminals are actively driven and floated at half the supply voltage (24V), so one must be careful not to connect either of them to ground in any way. The output filter consists of numerous toroidal inductors and capacitors, including some large NuForce-branded electrolytics. An additional common-mode inductor and film cap are placed at the speaker terminals to further filter HF noise. The power supply appears to be an off-the-shelf switching supply rated at 100 watts; it’s about the size of a cassette tape (remember those?) and outputs a single +48VDC rail which NuForce stiffens with an additional 24,000uF of capacitance. An even tinier auxiliary switching supply powers the control circuitry.

Each amp comes with a printout of actual bench measurements such as THD, S/N and frequency response for that particular unit. Component quality is generally okay, though there are some ho-hum touches like the cheap coaxial wire connecting the preamp to the amp. The small power supply (even by switching standards) is also cause for concern, but one must take into account the cost of engineering and manufacturing a proprietary implementation versus simply repackaging an off-the-shelf solution like ICEPower or Tripath.

There have been reports of NuForce amplifiers generating substantial RFI to the point of interfering with ancillary audio gear and nearby electronic devices. I was unable to set up a measurement rig to test this in time for this review, but it’s something I’ll need to investigate with Class D amps in future installments.

The Setup. The NuForce comes with a decent 16-3 cord with an attached ferrite bead. Normally I’m not a big fan of ferrites, but in this case it’s probably necessary to keep the NuForce from spewing too much RFI junk back into your power lines. Switching to the Audience PowerChord lifted some of the deadness I attributed in part to the ferrite, but also introduced a bit of grain and hash and thinned out the lower midrange. Also remember that the floating ground cords some audiophiles use are a no-no. I wound up sticking to the stock cord for the majority of my listening.

The entire chassis runs quite warm to the touch at idle but doesn’t get too much hotter when you crank up the volume – that’s Class D power efficiency for you. The review unit was factory-fresh and spent a lot of time on the burn-in rack continuously playing MP3s at high power levels into 4? dummy loads. Break-in time was an eternity… after a few hundred hours I’m still not convinced it’s really settled down. For some reason modern audio electronics like CD players and switching amps seem to require an incredible amount of break-in to really loosen up… perhaps it’s the lower power dissipation of the circuits, or the high speed of operation. Whatever it is, I would recommend at least 100 hours playing time before doing any serious listening.

The Sound. Before the aforementioned burn-in period, the NuForce sounds bad, really bad, and the first few dozen hours of burn-in seem to do little good. I’m sure there must be at least a few NuForce owners out there who experienced a week or two of disenchantment immediately following their purchase. With patience however, the NuForce develops into a formidable amp in two areas: bass and midrange articulation.

With a claimed damping factor of 4000 and the efficiency of Class D, you’d expect the NuForce to exhibit excellent dynamics and grip in the low end, which it does. What caught me by surprise, however, was the balance and transparency throughout the bass and lower midrange. Listening to the Scherzo movement from Mahler 5, bass and trombones have well-centered pitch and timbre throughout their range; there’s weight without heaviness, definition without dryness. Bass drum has an uncanny steadiness of timbre from impact to decay… it’s a unique sensation that’s difficult to describe, but once you hear it, other amps sound slightly lumpy and clouded in comparison. What I suspect I’m hearing is not necessarily the superiority of Class D at low frequencies (though that could also be a factor), but the absence of low-frequency coloration by using a switching power supply. Traditional linear power supplies rectify the incoming 60Hz AC and attempt to smooth it out using large capacitors and sometimes active regulation, but even with such measures there are lingering issues of ripple currents, varying source impedance and distortion. With a switching supply, the issues are pushed much higher in frequency, usually above 10kHz, and for good measure NuForce has augmented the supply with fairly large storage caps to ensure ample current reserves. When used with the Silverline Preludes, one couldn’t help doing a double-take at the quality, control and extension of the bass from such a small speaker and amp.

The good news continues in the midrange, which manages to be silky-smooth and detailed in a way I’ve found typical of the better switching amps, but with a surprising degree of warmth and fullness. Going back to the Scherzo movement of Mahler 5, midrange resolution was striking; the back-and-forth repartee of thematic fragments played by different sections of the orchestra came across with articulation and clarity, allowing one to make out the complex score with ease. On the other end of the musical spectrum, the midrange resolution brought alive all sorts of little inflections and details in tracks from Red Hot Chili Peppers One Hot Minute.

Spoiling this a tad is a mild case of opaqueness and thickness in the midrange, something I’ve heard from the ‘5532 op-amp before. But above the midrange, we start to see more serious transgressions. Out of the box the treble has a tingy, unnatural quality that mostly burns off, but never quite disappears. There’s a lingering grit to the upper harmonics of string instruments and a brittleness to brass instruments. Musical passages with a lot of sustained high-frequency energy can take on a "white noise" quality. At the same time, the upper midrange errs on the soft and recessed side, with a clear loss of resolution with increasing frequency. It’s akin to the fidelity loss one often hears with IC op-amps, but more severe... I suspect it could be coloration and signal loss from the fairly extensive but necessary filtering employed in the amp’s output stage.

At times there’s also an odd coloration that I can only describe as a "whooshing," like some sort of weird high-frequency Doppler distortion. The issue is in the top two octaves, and depending on your HF sensitivity it could range from mildly observable to maddeningly annoying. I found that I was able to adjust to it to a degree, but switching back and forth with the other amps would immediately put the spotlight back on the problem. My more sensitive fiancée could never quite put her finger on what was bothering her, but in the end she found it quite distracting. I’ve heard these kinds of HF aberrations from other Class D amps before, and it’s something you really have to hear for yourself before deciding if it’s acceptable.

Last but not least is a weird "noise gate" effect where the background is artificially black and the tail end of notes die out a little too quickly – something akin to what MGD complained about with SACD reproduction, which interestingly enough is also a PWM-based technology.* This basically decimates subtle ambient cues and low-level information like the air around instruments on the stage, something I refer to as the "glue" of the soundstage. Without this glue, instruments can still image clearly, but they are not held together and related to one another in a singular acoustic space. With solo work like the Britten cello suites, the sense of hall space was mostly obliterated, and the instrument lost much of its silky sheen and treble texture. Some of this is due to the softness of the upper midrange, which can be balanced with the right speaker; the more forward Merlin TSM was actually a good tonal match and minimized the loss of texture, but also further revealed the other low-level resolution issues.

Individually these issues aren’t necessarily deal-breakers, but in combination they give the sound a synthetic feeling, as if you’re listening to a re-enactment of the original musical performance rather than a reproduction. It’s odd because in some ways the NuForce is extremely detailed and musical; in others, it sounds very electronic. To a purist ‘phile bent on capturing the closest facsimile of the original event, its faults will no doubt seem wholly unacceptable. Yet I can’t help wondering if there are some music lovers out there for whom the articulation of individual voices and the solidity of the music’s foundation are more important, and the other issues are less critical to their enjoyment of the music. More so than any of the others in the survey, the NuForce is an amp that will evoke strongly varying reactions from different sets of ears.

Head-to-Head with the Bryston. The Bryston and the NuForce have modest power ratings of 50wpc and 60wpc respectively, but both are dynamic beyond what the numbers would suggest. The Bryston is better able to sustain its power, while the NuForce is a bit more explosive. Both are on the warmish side of neutral, with the Bryston being fuller in the upper bass and more forward in the presence region, while the NuForce is more recessed through the upper midrange. Treble fidelity goes hands down to the Bryston, while bass extension and dynamics go to the NuForce. The Bryston also runs out of steam more gracefully than the NuForce, which sounds very harsh at its limit most likely due to the small power supply pooping out at 100 watts. The NuForce is able to better distinguish individual images, but overall soundstaging goes easily to the Bryston, which just sounds hands-down more natural than the NuForce. With the Mahler 5 recording, the NuForce articulates the different voices more clearly, but in the end the Bryston paints a more cohesive and convincing "big picture."

The Wrap-up

For an urban ‘phile like myself where time, money and space are all at a premium, integrated amps make obvious sense. One less power cord, one less pair of interconnects, one less spot on the audio rack… the convenience afforded is compelling to the point where I’d be willing to make some sacrifices in sound quality. Thankfully, with this bunch, I never felt sonically compromised for having taken the easy way out; in fact, in terms of sound quality for the money one would have a pretty hard time finding separates combos on a comparable level.

The Dussun proved itself to be a real audiophile’s amp, with a combination of neutrality, detail and musicality that amps costing 3-4 times as much would do well to imitate. Even if it cost double what it did I’d consider it a solid value; at $500, it’s an unqualified steal. If you’re on a tight budget, or simply looking for a great amp that doesn’t cost a fortune – heck, even if you’re prepared to spend hundreds more – definitely give the Dussun a listen.

The Stello was hands down the most complete and refined package, and had it been a tad more transparent and emotional it could have taken the crown as the finest integrated of the bunch. It’s a good-sounding amp, clean and powerful with a slightly cool take on the music that caters more to the cerebral classical or acoustic jazz listener than the tube-loving romantic or head-banging rocker. For the price, I was hoping for more in the areas of harmonic completeness and dynamic richness, and at less than 1/5th the price the Dussun had the edge in midrange purity and openness, and to a lesser degree bass response. Nevertheless I’m sure the Stello will appeal strongly to those looking for something more upscale and flexible, particularly in a rig that also sees home theater duty.

The NuForce is the most idiosyncratic of the bunch, and the hardest to recommend. Its bass response and midrange articulation are exceptional, while the forgiving upper midrange helps balance more forward ancillary gear. When used with the right speaker, its strengths will clearly appeal to some music lovers; to others, its treble fidelity and low-level resolution issues will compromise the credibility of the reproduced event. Ultimately my feeling was that it has some kinks to work out and isn’t quite ready for prime time, but based on my experience with it I can say that Class D has great potential and will continue to gain followers. If you have the opportunity, the NuForce is at least worth a serious listen with an open mind.

So where does this leave the venerable Bryston? Each of the contenders was able to equal or surpass it in at least a couple areas, the Dussun in particular being musically competitive at a fraction of the price. But after dozens of hours of listening and countless A-B tests, there was always something special about coming back to the Bryston... I can’t say it any better than MGD, who a decade ago described it as a "warm audio nest. " It had the sweetest and most natural treble reproduction of any of them, and was the run-away winner in musical involvement. If the newest "SST" model is upgraded in performance without losing any of the "magic," I have a feeling it will easily defend the B-60’s title as a BFS reference.

* MGD comments: I find this statement by Marc extremely gratifying. Gratifying, in that while Marc has been a dedicated supporter of SACD, he was able to hear and describe the sonic ailments of the NuForce in terms of the similar technology used in it and SACD. He was obviously able to hear in the NuForce what I hear in the SACD digital format. The fact that both technologies are so similar was lost on me until reading Marc’s article, and yet, knowing what I now know, it all makes sense. The SACD format as a whole is necessarily colored due to the high frequency filtering and digital reconstruction required, a filtering absolutely mandated by the technology itself. It is incident to, and endemic of the format itself and as of this point in audio time, no one, not Sony, not NuForce, not Ed Meitner can overcome the sonic problems that so devastate the sonic qualities of every product based on some form of PWM technology. Bravo Marc Yun, your insights have proven beyond value.

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The Clayton Audio M-100 mono power amplifiers, $6,500. 8151 Stratford Ave. Clayton, MO., 63105. ph 314.862.6017; fax 314.862.0765; e-mail claytonamps@aol.com.; www.erols.com/tri/clayton. PUBLISHED June 2001.

This mono amplifier is a good one, about as good as it gets, and the best power amplifier reviewed to date in these pages. Well....at least until I get to the review of the Sierra Everest mono amps which retail for around $20,000. Though, for those who are expert at reading between the lines, that last sentence does not mean that the Everest is necessarily a better power amp than the M-100s.....that conclusion is yet reserved. But reserved for only so long; I fully intend to give my comparative conclusions once the full measure of the Everest is taken. As far as the M-100 goes however, I’ve got it in the bag.

Tale of the tape. Each M-100 mono amp weighs in at 47 lbs., is 9" x 9.25" x 20" (HWD), and cannot be converted to stereo use. Bias is true class A, and in that mode it runs hot, but the amplifier has a low bias switch which drops the heat sink temperature a good 15 degrees Fahrenheit, it also cuts Class A output by 50% (though overall output remains the same). Class A output into 8 Ohms is 100 wpc, and 200 wpc into 4 Ohms. Circuitry is discrete. Input impedance is 47,000 Ohms. One set of speaker terminals (WBT). RCA and XLR inputs for single ended and balanced operation. Each amp has a 1,000 VA toroid transformer with 120,000 uf of capacitance. The M-100 also has 8 Motorola high current bipolar output devices per channel. The use of the high current devices result in this amp having an amazing current capability - 200 amps continuous! There are no capacitors in the signal path. A "power on" sequence keeps the amp from damaging the speakers upon turn-on. Each amp has 26 volts of gain, and AC polarity is correct from the factory.

Set-up. Preamps with the M-100s should probably be solid state. The input impedance of 47 kOhm doesn’t totally preclude tube preamplification, but to get all the dynamic life this amp can deliver, I’d go solid state. During my auditioning, excellent sound was attained with the Aloia, and Symfonia preamps. Both of these preamps have brutish power supplies, and for them, the 47 kOhm input impedance of the Clayton was exactly what the music doctor ordered. So, if you be using a Blowtorch, a Reflection, a McCormack, a Klyne, or anything quality coming from the solid side of silicon valley, it will work with this amp. Speaker-wise, the M-100s can dump some current into a speaker, and it will keep dumping that current down to 1 Ohm! Yes, 1 Ohm!!....part of that story being the high current Motorola bi-polar output devices — they are high speed and they can pound out the juice. We, as audiophiles, tend to throw around the phrase "high current" sometimes when it isn’t really warranted; it sounds snappy though, like we know some technical stuff. However, in this case the phrase is appropriate. This amp is Krell-like in the current department, which means that it loves a low impedance loudspeaker, absolutely going into a feeding frenzy on loads that hover around 2-6 Ohms. Yet, it’s not so muscular in the power supply department that 10 to 16 Ohm loads strangle it at the outputs. Stay away from high impedance loudspeakers, though, if you want this amp to do its very best. There’s something special at work when this Clayton is doing its thing into a 4 Ohm load that has to be heard to be believed. I just wouldn’t use this amp into a load over 8 Ohms for optimum performance. Clayton has a nice little specialty power cord for the M-100, but I liked the JPS Kaptovator the best in this application. Interconnects used during auditioning were from JPS and Mapleshade.

Sonics. Sometimes the most accurate way of describing the sound of a component is to pass along an experience. Had several with this amp, but the most telling was clearly the "Clapton - Cat" night visit. The Clayton amps had been breaking in for over two months, and serious listening had just begun a night or two before. This night had been reserved for the old chestnuts in the collection; Red Norvo, Drink Small, Eric Clapton, The Allman Bros, Tchaikovsky, and Stan Rodgers were all in place. These recordings have what I need to get a true reading on a component, and while I listen to many recordings, these come out at prime time. On this occasion, I’d been listening since 7 p.m. and at around midnight I walked into the bedroom where my wife was reading one of her Nero Wolfe mysteries. Standing in the doorway all I could tell her was ... "I’ve never heard Clapton before". And indeed I hadn’t. This time the music was different than every time before....It was his voice, and it came to me with the arrival of the M-100s.

Now, to understand the importance of such a statement, one has to know that I’ve been using Clapton’s "Unplugged" as a reference since it came out in 1992. Its pulses and organic, natural tones have been a part of every appraisal made with the Big Rig from the day of its issuance, and if I’ve heard Malted Milk and Old Love once, I’ve heard them a thousand times - literally. Not only have I heard it in the Big Rig, I’ve heard it at shows and demonstrations with systems costing as much as a townhouse in Midtown. But I’d never actually heard Clapton’s voice before (!) - I was a little bit dazed. Upon hearing my proclamation, all Laura said was, "Try Cat Stevens, then report back". Turns out I’d never heard Cat either. At least not until the M-100s were in the system.

From time to time, I stumble across a sound that is practically impossible to describe other than say it is "right". I think back some years to an experience that I had with the Sci-Fi Crown Joule loudspeakers, RE Designs power amp, and Metaxas preamplifier. I don’t recall the specifics of the set-up, but the sound from that combination was "right", unbelievably so. I knew it the moment I heard it, but I’ve never been able to adequately describe it; one of those "you know it when you hear it" things. And it’s when you hear a system that is "right" that the words to describe the performance disappear. They disappear because you realize that all the old adjectives and descriptive terms used so many times before simply won’t work anymore...they don’t fit. There was a rightness with the M-100s in the midrange and the human voice that made description very difficult - it was "right" in so many ways, but of course, not perfect. More on nits later.

From power amp to power amp, the colors of the human voice change subtly, even with the same recording. Usually, the change is little more than just that - a change. There may be a difference in tone or character that fails to improve or detract at a fundamental or human level. Different generally is not better, though it may create some temporary excitement until the ear figures out what’s really going on. But with the M-100s the sounds recreated were not only different from what I had heard from other power amplifiers, they were more human sounding, hence, more realistic and accurate than what I had been listening to. Our auditory systems are incredibly discerning when it comes to identifying and sorting out nuances within the human voice because we are so familiar with it. The human voice produced in this case had more humanity in it when using the Claytons than with any amp I’d heard. But why was that? I’ll have to ask Wilson.

The Clayton mono amplifiers have tremendous bass response, very much in the same league as the best that have been in the Big Rig. So, which companies does that include? I’ve had amps in from Krell, Coda, Polyfusion (the 960 was a monster), Counterpoint, RE Designs, Sunfire, Sierra, Plinius, etc. And the Clayton M-100 mono amps are as tight, deep and fundamentally correct as any, and that’s true in spite of the somewhat limited power rating ascribed to the amps of only 100 wpc. Watts are not watts, and the current and control that are part of the Clayton formula make it one powerful amplifying mutha’. Not to trash the makers of other well respected brands, but there is something special about the bass from a power amplifier with a ton o’ power supply and multiple super high current bi-polar output devices. In the case of the M-100s tight visceral bass does not mean restricted or light as it can in some solid state designs. I guess, in terms of bass tone the Clayton amps are a bit tubey in terms of the spectral balance (great timbre), but never loose or ill defined as tube amps generally tend to be.

Listening to Red Norvo’s "Forward Look" provides the standard for percussion and tone colors. I compared the M-100s at length to the SimAudio Moon W3, and the NTA OTLs. The Naked Truth Audio mono OTLs were incredible at doing one thing, and good in other respects. What the OTLs did wonderfully was impart to the music an amazing sense of musical immediacy. Having heard many a tube in my day - including C-J, ARC and VAC - the dynamic presence that the NTA displayed in the mids was more than a matter of simply using tubes, or an OTL circuit. If it were just that, then all tube amps would possess the same stunning presence, which they do not. The Clayton mono amps were within a bat’s eyelash of possessing that same dynamic spontaneity, i.e., the feeling of being at the mic and of having the leading edge dynamics leap at you from nowhere. The Claytons were a tich down in that regard from the NTA. But, while being only a tich down in that respect, the M-100s maintained its immediacy over a much wider swatch frequency wise....from the depths of the bass through the lower treble. Quite an accomplishment.

Compared to the Moon W3 from SimAudio, there were some strong similarities, especially in the major aspects of the sound, i.e., bass definition, midrange presence and treble. But the W3 couldn’t drop my jaw with the human voice the way the Clayton did. As fine as the SimAudio is, even when used with the Triphasers, it ended up missing some of the intangibles, the little things that the M-100s excelled at.

In addition to that, the M-100s had a presentation that was at the same time detailed and grainless; allowing the natural textures of a recording to come through in an uncanny way. The combination of which (leading edge dynamics, spontaneity, musical immediacy, and an utter lack of an overlying grain artifact) allowed me to hear Eric and Cat in ways that I had never heard them before. In the simplest of terms, this amp let through a little more of the music through a wider window than the others by imposing less of its personality on the performance. Because of it, this is a reference quality device.

Lest you think this the perfect amplifier, I should add a few nits and picks at this point. Like other amplifiers, the M-100s have an overall coloration. Unlike other amplifiers, its coloration does not reduce the total transparency of the amp....it just shades it. Like Clayton amps I’ve heard in the past (S-40), there is a shading toward darkness, call it a moody flavoring. I’m not referring to warmth, or the warm audio nest sensation. There is a difference between warm and dark. Warmth is cuddly, dark is brooding. Hey, for now, that’s the best I can do. And while the Clayton M-100s are not prohibitively so, there is a touch of darkness to the sound. Almost gothic like, these amps have a little bit of an aura. Bad? Not so bad that I wouldn’t purchase them in a minute, for the coloration is minor, and for the most part sympathetic to the musical replay process (meaning it doesn’t impede it).

I almost forgot imaging. The M-100s have some of the densest, most solid images this side of Mt. Rushmore. With even more power one might get a little more rounding out and dimensionality on the seamless stage. But in this regard, the Claytons have the lateral spread of the McCormack DNA-225, and the precise 3D layering of the Aloia. Those are some pretty impressive credentials.

Conclusion. Again, a great power amplifier. The M-100s are not as pretty on the inside as the SimAudio Moon W3; for that matter it’s not as pretty on the outside either. But sonically, the M-100 is a superior product in pretty much every way, and without the assistance of the Tritium Triphasers being an absolute necessity (though it was a plus).

Compare this amp to an amplifier of the past? Not easy. In all honesty, when looking for a sonic comparison I keep coming up with the Monarchy SE 160 mono amps. They too are all discrete, and operate in the class A mode. The SE 160 however, has a tube front-end and MOSFET output devices, while the Clayton is all solid with bi-polar outputs. Both are just a tad dark, both are dynamic to the hilt, and each amp images like a bandit. However, the Clayton is better in the bass and projects a more powerful persona. The Clayton is more finely resolute, and slightly more revealing of super subtle textures while ever staying in control. But it’s close, both are exceptionally gifted designs. Also, in comparing the Clayton to the SE 160 instead of the Aloia amp, I am acknowledging the Clayton’s heightened ability to catch the flash and energy of a performance. You may recall last month when I made reference to the SE 160 as a "flashy" sounding amplifier, the M-100s have that same panache and verve...they can replicate the electricity of the moment.

I understand that there is an upgrade from the M-70 mono amps to the M-100s. It costs about $1,600, and can be retrofitted into the M-70 chassis. It involves a larger transformer, and more filtering in the power supply. According to Wilson at Clayton the sonic improvements with the upgrade are most obvious at the frequency extremes. I’m sorry, I’ve never had the M-70 mono amps in house, and for that reason can’t comment specifically on what the upgrade means sonically. But I know this, the M-100 is in many ways a sensational sounding amplifier that to these ears set some new naturalness standards, especially regarding the human voice. The extra transformer power and capacitance involved with the upgrade cannot be bad things - so why not? MGD

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The 100 Greatest "Rock Albums" of all Time
by MGD

Over a year ago (June 2000) the idea of a "100" best of all time listing began to bounce around in my head like a ping-pong ball between two hard surfaces. I knew it had been done before, but in my mind, while many of the listings had been appropriate, a certain amount of political correctness had crept into the selection process. We had to do something different, the BFS top 100 listing would be based on one thing: the music, and no amount of politicking would push a recording up the ladder even one position.

Another consideration was that this listing would be for "rock" albums. Not rock and roll, not Motown, not folk, not metal, not jazz, not rap, not the blues, not anything except good old fashioned "rock". Granted, excluding other closely related forms of music would keep some of the world's best loved favorites out of this listing. As a result, the likes of Miles Davis, Buddy Guy, Junior Wells, Stevie Wonder, Joan Baez, Carole King, Buddy Holly, Roy Orbison, Robert Johnson, Count Basie, on and on.... would not be included. Some wonderful performers would, by definition, be casualties of my desire to set parameters and limits on how far this listing could reach. And indeed, I thought the failure to set boundaries was the primary reason the recent listing on VH-1 was a complete failure. And fortunately so...

After starting this project two Junes ago, my heart hit the floor when I heard that VH-1 was doing a Best of Rock listing wherein the top 100 rock recordings of all time would be listed. My thunder had been stolen I fretted. How could I come out with this listing after them and not appear to be anything other than a copy cat compiler? As it would happen, however, they did me a great favor by allowing people such as Britney Spears assist in the selection making process, and for the sake of political correctness included noteworthy performers such as Miles Davis and Aretha Franklin, who, as notable as they were, had nothing to do with rock. They have their own categories founded in the blues, jazz, folk and Motown. With classical and country, I hope to someday compile top 100 listings for all the major musical forms, but not here... this is rock.

This listing is not a personal pick of my favorite recordings, or the personal favorites of anyone here at BFS. Artistically, I don't care for some of the recordings chosen for inclusion, but included they were, for I consider this effort to be historical in nature, even archival, and objective in that the recordings chosen were chosen for what they meant to the genre' as a whole during it's birth, growth and maturation. In other words, what we are doing here is to report, in a manner as fairly as possible, on the recordings that formed the music which came to be known as rock music.

As stated above, you will not see listed here selections from what is known as heavy metal, death metal, black metal and rap. Not that people don't listen to those forms of expression, but as we were talking to people about the recordings to be included here, and obtaining various opinions, I felt that the content of the above were not right for inclusion. The dehumanizing subject matter that is a regular part of heavy metal and rap scene has no place here. And for that matter, rock recordings delving into the satanic or dark beliefs have not been included here either. If those things interest you, go elsewhere.

So, how were these recordings chosen? Billboard charts for the last thirty, or so, years were scoured to determine the impact each recording had on the buying market. People in the industry, recording and playback, were consulted and asked for suggestions. Day long listening sessions were conducted to see how the music held up today. And for me, this latter aspect of the selection process was one of the most important. Did the music sound dated? If so, it dropped in rank, which would explain why some of the Beatles and Rolling Stones recordings slipped. As notable as their recordings were, they sound dated in comparison to the recordings listed in front of them. Music is timeless, and to be included here it had better sound that way.

Impact. How much did a certain recording impact the music scene at the time it was released? Also considered here, was to what extent the recording reflected the climate of the times. For those reasons alone, Sergeant Pepper's has a place in the top twenty, whereas, if the only criteria were musical accomplishment, it would probably be much lower. Did any recording reflect the rebellious spirit of the young in the late sixties and early seventies more accurately than Woodstock? That's why it is here.

Musical accomplishment. For obvious reasons this criteria was the most difficult to apply, while being the most fun to contemplate and debate. And yet, along with whether or not the music retained a contemporary feel to it, the ultra subjective notion of just how "accomplished" the music was ultimately determined where a recording ended up on the list. One thing that we tried not to do was allow one good song on an album mean de facto inclusion here just because of that one good song. Initially, I was expecting to include many more albums from the early sixties; Turtles, Boxtops, Hollies, Dave Clark Five... stuff like that. In going over those recordings though, two things emerged: By any standard, the music sounded dated, incredibly so. By my own criteria, that wasn't good, and could not be easily overcome. The other thing that bothered me about many of the early sixties recordings was the preponderance of many to have just one extremely fine song, and seven clunkers to go with it. In some instances, two or three worthy songs would surface, with the rest being so hoaky sounding that I couldn't force myself to include the album. After all, we are looking for consistently excellent results throughout the album... not just a song or two.

Another consideration was whether it was thought that another band could have made the same album, and had it come out as good or better than the original band. For example, no one could have made "Dark Side of the Moon", with the same mood, art and expression as did Pink Floyd. Could anyone other than the Beatles pulled off "Sergeant Pepper"? But that's not always the case even with what are thought to be monumental works of music. Two Stones tunes for example. It is arguable, and I believe true, that Grand Funk's version of "Gimme Shelter" is the better of the two. The same for Leon Russel's version of "Jumping Jack Flash." And while those were actual instances of a superior remake, the thinking here was that if it seemed a band's performance in recording an album, as great as it may have been, could have been improved upon by someone else doing the same material, the original sunk. This aspect of consideration didn't really enter into the factoring until well into the list.

Lastly, we did on some occasions stretch the envelope style wise where a performer was slightly something other than true rock, but still impacted the future of rock music. Joni Mitchell comes immediately to mind in this regard, as does Tracy Chapman, Peter Gabriel, Linda Ronstadt and Poco. They are here because they deserve to be even if they don't perfectly fit the mold as defined by the word "rock".

This is the BFS list:

1. "Dark Side of the Moon", Pink Floyd

2. "The Allman Brothers Band at Fillmore East", The Allman Brothers Band

3. "Led Zeppelin I", Led Zeppelin

4. "Security", Peter Gabriel

5. "Tres Hombres", ZZ Top

6. "Abbey Road", The Beatles

7. "Led Zeppelin II", Led Zeppelin

8. "Revolver", The Beatles

9. "Exile On Main Street", The Rolling Stones

10. "Pet Sounds", The Beach Boys

11. "Close to the Edge", Yes

12. "The Yes Album", Yes

13. "Fragile", Yes

14. "Every Picture Tells a Story", Rod Stewart

15. "Sergeant Pepper's Lonely Hearts Club Band", The Beatles

16. "Woodstock 1969", Various

17. "Abraxas", Santana

18. "Goodbye Yellow Brick Road", Elton John

19. "Tea For the Tillerman", Cat Stevens

20. "Deja Vu", Crosby, Stills, Nash & Young

21. "Unplugged", Eric Clapton

22. "LA Woman", The Doors

23. "Crime of the Century", Supertramp

24. "Are You Experienced?", Jimi Hendrix

25. "ZoSo", Led Zeppelin

26. "Never Mind", Nirvanna

27. "Blonde on Blonde", Bob Dylan

28. "In the Court of the Crimson King", King Crimson

29. "Chicago Transit Authority", Chicago

30. "Hotel California", Eagles

31. "Who's Next", The Who

32. "Auqualung", Jethro Tull

33. "Machine Head", Deep Purple

34. "And Justice For All", Metallica

35. "The Wall", Pink Floyd

36. "Rumours", Fleetwood Mac

37. "American Beauty", The Grateful Dead

38. "Survival", Grand Funk Railroad

39. "Days of Future Past", Moody Blues

40. "Purple Rain", Prince

41. "Blind Faith", Blind Faith

42. "Layla, and Other Assorted Love Songs", Derek and the Dominos

43. "American Pie", Don McLean

44. "Hasten Down the Wind", Linda Ronstadt

45. "Blue", Joni Mitchell

46. "Love Over Gold", Dire Straits

47. "Book Ends", Simon & Garfunkle

48. "Back in Black", AC/DC

49. "Blood on the Tracks", Bob Dylan

50. "Selling England by the Pound", Genesis

51. "Chicago II", Chicago

52. "Katy Lied", Steely Dan

53. "Stand", Sly and the Family Stone

54. "The Kick Inside", Kate Bush

55. "Some Girls", The Rolling Stones

56. "The Rise and Fall of Ziggy Stardust", David Bowie

57. "Electric Ladyland", Jimi Hendrix

58. "John Barleycorn Must Die", Traffic

59. "Born to Run", Bruce Springsteen

60. "Blood Sugar Sex Magik", Red Hot Chili Peppers

61. "Appetite for Destruction", Guns and Roses

62. "Outlandos D’Amour", The Police

63. "In Color", Cheap Trick

64. "Madman Across the Water", Elton john

65. "Couldn’t Stand the Weather", Stevie Ray Vaughan

66. "Bridge Over Troubled Waters", Simon & Garfunkle

67. "Low Spark of High Heeled Boys", Traffic

68. "Tracy Chapman", Tracy Chapman

69. "Free For All", Michael Penn

70. "Between the Lines", Janis Ian

71. "Thick as a Brick", Jethro Tull

72. "Wish You Were Here", Pink Floyd

73. "Sweet Baby James", James Taylor

74. "Get Your Wings", Aerosmith

75. "School’s Out", Alice Cooper

76. "Tommy", The Who

77. "Part One", The Kinks

78. "The Captain and Me", The Doobie Brothers

79. "Joan Armatrading", Joan Armatrading

80. "Pronounced Leh-Nerd Skin Nerd", Lynard Skynard

81. "Superfly", Curtis Mayfield

82. "Ten", Pearl Jam

83. "OK Computer", Radiohead

84. "Three Friends", Gentle Giant

85. "Ambrosia", Ambrosia

86. "Gordian Knot", Gordian Knot

87. "Fun House", Iggy Pop and the Stooges

88. "Get Ready", Rare Earth

89. "A Night at the Opera", Queen

90. "Emerson Lake & Palmer", Emerson, Lake & Palmer

91. "Blow by Blow ", Jeff beck

92. "Lights Out", UFO

93. "Steppenwolf", Steppenwolf

94. "Illusions on a Double Dimple", Triumvirat

95. "Song for America", Kansas

96. "Carney", Leon Russel

97. "From the Inside", Poco

98. "All the Young Dudes", Mott the Hoople

99. "Twelve Dreams of Dr. Sardonicus", Spirit

100. "Fashion Nugget", Cake

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Altis Ultima Outboard Digital to Analog Processor
by MGD

Altis2-1.jpg (35391 bytes)

Ultima by Altis $10,000. Outboard digital to analog processor. Outboard power supply, tube analog section, three digital Inputs switchable from the front panel, RCA and glass inputs, phase invert, 128x bitstream digital architecture. On loan from manufacturer. Altis, 34 Tunnel Rd., Newtown, CT 06470.

 It isn't often that a reviewer has the opportunity to say that a product he is reviewing is "The Best". The inability to hear everything available, the existence of some super expensive exotic unobtainium, and the existence of a competing unit with similar capabilities oftentimes preclude a designation as "The Best". In addition to that it takes real guts to hang your hat on a product knowing that when you do, everyone from your mother to the minister down the block are going to take issue with your proclamation. And to be fair, most of the opinions that take issue with you will be well grounded and sincere. For that reason, the term The Best is seldom applied here.

 There are some exceptions to this guideline, however, and oddly enough, the other exception is also an outboard digital to analog processor (ODAP). About a year ago, Stereophile took a stand (admirable) on the Madrigal ML 30 processor, proclaiming it to be in a class all its own. And while I often take issue with what I see as influence laden opinions from the Santa Fe Bugle, I have to give 'em credit for putting their eggs on the table. Only one thing - with the introduction of the Ultima, them eggs been rolled in hot sand.

You've stayed with me this far, so let me say it: I think the Altis Ultima "The Best" ODAP one can presently buy. I accept the possibility that the Krell Reference or maybe the Vimak might perform at a level of competence equal to or better than the Ultima. But, that's the only possible caveat that I see. Still, I've heard at one time or another, those processors and every other world class contender under conditions that must be considered at least decent to excellent. Not one, I repeat, NOT ONE processor (including the much overrated Madrigal ML 30) listened to by this wide eyed boy has ever done what I have heard the Ultima do. As a fact, I have never heard an analog system do some of the things that the Ultima can; and I'm talking real good things.

First of all, if you want the best from this machine your set-up must be top notch. That means the best

instead of feeling like the performers are in your room, you feel like your stereo has taken you back to the monitoring room where the recording was made. It's like listening directly to the mic feeds without the euphonics that make the sound realer than real or sonic detractions brought on by the playback process. And while I've talked about other products sounding like music off the mic (NEAR 50m), or going back to the source (a number of things), the Ultima traverses new transparency frontiers.

 In more detail, the mind starts to see a large opening six inches behind the loudspeakers. The opening goes from the floor to three or four feet above the tweeters; it goes from a foot or two outside of one tweeter to the same distance outside the other tweeter. From there the stage widens and grows taller as you look deeper into the original recording venue, sort of like a rectangular telescope... the perfect soundstage. But, know this, this soundstage always has a back wall, unless the recording is made outside. There's always a limit to depth, there's always a finite area within which the music is made, just like reality. Then the music emerges from that finite space with brilliant suddenness. Contrasts are striking. For the first time you hear source material without micro blurring -the focus and presentation of the smallest details seem to go to the very floor of resolution.

Mesh distortion, the meshing of noise and distortion together with the musical signal, is negligible; the lowest around. Don't misunderstand, this unit has distortion specs which indicate the existence of such things; the specs are not 0.000 ad infinitum. But, like other great audio products of our time, the distortion element of the signal does not interfere with the musical element of the signal; the music and the distortion do not mesh. A thing that seems more natural to tubes than transistors, though some transistor amplifiers and a preamp or two, are capable of presenting the music in this way.

Above, I indicated that the Ultima didn't necessarily bring performers into the room, instead taking you to the performer's original venue. The exception that I referred to is when a recording is made in such a way that the recording venue is closer to a living room than a studio (Mapleshade recordings), and some recordings which don't have enough low level information on them to give a true indication of what the original venue was like.

If I seem overly enthusiastic in the writing of this review, I hope you understand that this processor made my listening sessions extremely happy ones. If this processor, once inserted into my system, resulted in great emotional contentment - a feeling of, yes that's right (!), for the first time -why shouldn't I write the review in a fashion similar to the way the performance of the processor made me feel? It expanded my concepts of what the preamp, amplifier and speakers in my system were capable of. Then my thoughts turned to the notion of how wonderful my system might sound if all my components had the resolving power of the Ultima.

 At this time I would usually go into a dissertation on the technical aspects of this Altis design -there are many. But this review is long enough, and I want to highlight only the most unusual aspect of this processor. Part of the expense of the Ultima results from the micro-processor inside. It has the power of a highline DSP, but it's not a DSP processor. The Ultima has the unique ability to choose from several different digital filters, including no filter at all, when the musical signal can utilize it. And while you cannot hear the changes, this unit goes from one filter to another largely dependent on the amplitude of the signal at any one given time without a chirp. Quite frankly, I don't understand it, but the processor sounds incredible and for that reason, I don't care how it works. It's the music baby, it's the music!

From here I could go on in a number of directions, be it build quality, sonics or technical. But, I'm afraid that to do so would only dilute what has been written so far. I accept the fact that my proclamation of the Ultima as "The Best" will be fraught with challenges and attacks, but, rest assured that what I'm saying is not motivated by outside influences such as advertising or a free gift of the unit. (I can't even get one on long term loan so great is the demand in excess of the availability, and as for a purchase, it's beyond my budget.) The Ultima from Altis was here for about five weeks, and I hated to see it go. The memory of what it did sonically, though, will remain within these walls for a long time.

BFS is reprinting this review of the Altis Ultima ODAP as a memorial to Howard Mandel, owner of Altis, who died on September 27th, 2001.

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TOP TEN LIST: REASONS FOR THE DECLINE OF CD SALES IN 2002
by MGD

Some people have real nerve. Call it audacity, call it the unmitigated gall required to mislead the American music buying public for no reason other than spew out self serving propaganda, all the while expecting one and all to believe them. Can the RIAA say this with a straight face?

What I’m referring to is the recent press release by the RIAA stating that CD shipments have dropped by 7% in the first six months of 2002. They are directly blaming said decline on the pirating of their copyrighted materials on-line. According to the RIAA, two recent studies conclude, or at least give solid evidence of, people downloading from file-sharing services more now than ever before, while at the same time purchasing fewer CDs. And indeed, the facts and figures do seem to render at least modest support for what the RIAA is saying. Of those persons downloading more music this year, a full 22% said that they were purchasing fewer CDs. On the face of it, those alleged facts would seem to infuse some validity into the RIAA’s claims.

"On the face of it", I said. Looking below the surface of the studies done shows that there are some flies in the pudding the RIAA is trying to feed us. Such as: The studies also show that people who are downloading less music off of the internet (which is what the RIAA wants all of us to do), are also purchasing approximately 22% less music from stores. Nor do the RIAA studies which appear so conclusive at first blush indicate why those who are downloading more are buying less. It would seem to be a reasonable conclusion offered by the RIAA, but anyone with an even a remedial understanding of statistics knows that there are numerous reasons other than pirating which could cause people to buy less music. Obviously, the RIAA doesn’t think us smart enough to understand that.

As proof of the extent to which we fully understand the real reasons behind the dilemma the RIAA is presently in, and why we, the people, can’t be deceived by the meretricious behavior of the RIAA, Bound for Sound introduces its first TOP TEN LIST: REASONS FOR THE DECLINE OF CD SALES IN 2002:

10. By endeavoring to squeeze out "indie" label sales, while not picking up "indie" label talent, the overall talent level in the music industry has shrunk drastically (see # 2).

9. The RIAA intentionally doesn’t include the sales of DVD-A, SACD and DVDs in its sales calculations, all of which significantly contribute to the lower CD sales while having absolutely nothing to do with pirating.

8. The compact disc has been around for more than twenty years, the newness has worn off and people are looking for something different. There is much more competition for out leisure time now.

7. The RIAA and the "Big Five" music producing companies can’t agree on what day of the week it is, much less put together a coherent marketing strategy to promote new music releases.

6. The newest generation of "visual kids" will watch music videos all day long, but find music without pictures to be boring and lacking stimulation.

5. The RIAA would rather beat down and destroy on-line music file-sharing services with monumental law suits, instead of understanding that these services have taken the place of the "top 40" AM music radio stations of the 70’s and 80’s whereby listeners discovered new music for free.

4. That the RIAA doesn’t really want to sell you CDs, that takes work, outlets and a marketing strategy. They’d actually rather have us download music while paying them $3 a song.

3. CDs cost too much for what is being provided. The average CD costs less than $2 to make including all artwork. After Enron, people are tired of corporate robber barons ripping them off!! (Let’s talk about that kind of ripping.) In addition to that, a used CD (they don’t wear out you know) can be bought and sold for $5 - $6, over and over again.

2. Britney Spears, 98 Degrees, The Backstreet Boys, N’ Sync, Goo Goo Dolls, et al. The major labels are crowding out the real talent in favor of musical dullards designated "sure bets" that dominate their bottom-line mentality. And it’s all our fault.

1. The country is in a depression economically. People have seen their entire life savings and pensions melt away like ice cubes on the Sahara sand. Incomes for many have declined by 20%, 30% and more due to rational national fears. Young men and women are dying in Afghanistan. Lay-offs in the work place have become common as people learn new occupations and look for new means of support . And the music making industry majors are complaining that they can’t afford the amenities required to whiten the noses of their major acts due to us pirating their music. All of a sudden the 7% down turn in CD sales doesn’t seem nearly large enough.

Buy "indie", buy used, buy records … ‘nuff said.

 

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Anthony Gallo Acoustics Nucleus Reference3 Loudspeaker by MGD

The Reference III Loudspeaker from Gallo, $2,595. 20841 Prairie St., Chatsworth, CA 91311. ph. 818/341-4488 fax. 818/341-2188 www.roundsound.com. 3-way loudspeaker.

In 1998 we covered the original Gallo Nucleus Reference loudspeaker. To this day, it is still one of the better loudspeakers to be auditioned by BFS. Were I to establish a hall-of-fame for loudspeakers listened to in the Big Rig and reviewed herein, a few models come to the fore as first ballot shoe-ins: The Scientific Fidelity Crown Joule would be in, as well as the VMPS RM40, the Jovian Pillars from Amrita, the Merlin VSM and the Silverline LaFolia. At, or near, the top of the list would be the original Nucleus Reference (including Bassballs). Each speaker contained two round aluminum spheres as chassis for a 6.5" woofer drivers; the visual effect being something like a large metal eyeball with the driver being the iris. The spheres were stacked one above the other, the top sphere wearing what looked to be a fez. But hats aren’t allowed in the listening room. The cylinder on top of the upper sphere was actually a 360o film tweeter capable of spanning the super-sonic with ease. For reasons that I don’t know, the speaker was discontinued a year or so later as Tony focused his efforts on smaller music reproducing spheres with 3" drivers and home theater applications. This didn’t keep the Reference from becoming a true collectors item and a loudspeaker classic. I can’t tell you the number of calls and e-mails we received regarding the old Reference and persons wanting to buy them new, used or in any condition they could be found in.

We now have the new Nucleus Reference3, and to say that expectations are soaring is to only state the obvious. Factor in the history of the speaker with a price that (in light of the inflationary price tendencies of everything from gasoline, to milk, to phono cartridges) is nothing less than reasonable, makes this story all the more interesting. In spite of all the press attention given to $5,000+ audio products in recent years, all of audio still loves a bargain.

Tale of the tape. Look at the photos. It will no doubt help in understanding my description to follow. The speaker is a 3-way design utilizing a series crossover between the woofer and two midrange drivers. I understand that there is no electrical crossover between the midrange drivers and the tweeter. Hence, the Reference3 is crossover-less from 125 Hz through 50 kHz. Designs like this tend to be more phase correct than parallel designs, while tracking dynamic contrasts more accurately (better contrasts with less ringing). The speaker does not have a cabinet as cabinets are usually thought of.... there is no box. Nominal impedance is 8 Ohms, with a sensitivity of 88 dB. Dimensions are: 36" x 8" x 16" (HWD). The weight of one speaker is 47 lbs. The mid/tweeter configuration is MTM with 4" carbon fiber mid drivers, and the aforementioned CDT film tweeter with a -3dB point of 50 kHz. The woofer is a 10" long throw with a dual voice coil (one coil for standard operation and a second coil for sub-woofer use). The woofers are not forward firing, instead being placed on the side of a "woofer pan" that will point in or out. The metal backbone of the speaker is hollow, and is used as part of the woofer enclosure, effectively adding volume for the rear wave of the woofer. The tweeter has a switch for +2 or -2 dB of adjustment for different room situations. Build quality is superior.

Set-up. The Reference3 has exceptionally wide dispersion characteristics. The tweeter, due to being placed up against the backbone of the speaker, has a dispersion pattern of only (!) 300o instead of the 360o of the original. Lateral dispersion is nearly perfect. Vertical dispersion is limited, but not nearly to the extent found with the two ribbons used with the VMPS RM40. Standing up from the listening position resulted in the highs being attenuated, but not terribly so - very listenable still. In the past, speakers with very wide dispersion characteristics have proven problematic in terms of room placement. That’s simply not the case here. With the round spheres acting as enclosures for the mid drivers, they disperse in much the same way as the tweeter does. As a result, not only does this speaker have the widest sweet spot I’ve come across, it’s one of the easiest speakers I know of to place in the room. Thinking of HR Weiner’s review of the Walsh Ohm loudspeaker last month, those speakers and the Reference3 must image and stage in similar ways. The only real placement concern is with the woofer. Tony suggests that most people will want to point the woofers "out". In the Big Rig, I tried listening to the speakers both ways, but in the end, ended up with the woofers pointing "in". That, however, may have more to do with the configuration of my listening room than anything else. In my set-up, there were fewer frequency irregularities with the woofers pointing in. This feature, it seems to me, presents more of an opportunity than a placement dilemma. If your speaker options are limited, the ability to face the woofers in or out basically doubles what you are able to do.

This speaker is not bi-wireable. It may appear that way - but it is NOT! Each speaker does indeed have two sets of terminals on its backside. It looks like a bi-wire arrangement, but don’t be fooled. If you remember your Loudspeaker Crossover 101 rules, you will recall that one cannot bi-wire a series crossover. In this case the upper set of terminals on each speaker is for full range operation. The lower set of terminals is for a second voice coil on the subwoofer which runs full range if hooked to your amp. You need a low pass outboard crossover to run the second voice coil. Running the second coil will extend the bass response of the loudspeaker to around 22 Hz. But if you try and run it without a low pass filter, say bi-wiring it from a single amp, the speaker will sound ultra bass heavy, thick and slow. My speakers came without an owners manual, so I hooked it up like any bi-wireable speaker.... I was wondering how I was going to give Tony the bad news regarding the sound. Turns out I won’t have to. The second voice coil has an impedance of 4 Ohms.

Going from the 92 dB efficient VMPS RM40s to the Reference3 at 88 dB was noticeable. The Gallo speaker took more power, but being an easy 8 Ohm load, I think it was a more friendly load to drive than the VMPS. Unlike the RM40, the Gallo could be driven by anything (even tubes) having 50 wpc or more. As long as one isn’t trying to drive the subwoofer voice coil, the speaker was actually tube friendly. Tony was able to put out some serious sound pressure levels in Las Vegas using one of the smaller Rogue amps.

The Reference3 comes with tall and short spikes for floor placement. The tall spikes are for the front of the speaker, while the short spikes go in back. Each speaker comes with a tweeter adjustment switch, with which, one can move up or down 2 dB (I used the flat setting). However, one can also change the spectral balance of the speaker by adjusting the amount of backward tilt. Raising the back of the speaker up moves the mids and tweeter driver forward and up. As you move the rear of the speaker up, the highs become more pronounced and forward. Very small changes can make for large sonic variations. I ended up not adding any height to the rear of the speaker, but I can picture some rooms where the added spectral flexibility could be a benefit.

The footprint of the speaker is narrow, and I expected some unsteadiness (rocking) from side to side. The speaker turned out to be sufficiently stable, as the placement of the woofer lowers the center of gravity enough that it resists tipping to an acceptable degree. Although the speakers look a little odd and alien, my wife gave them a big thumbs-up when it came to room appearance and the so called "wife acceptance factor". She has ended up liking the speakers a great deal, not so much based on sound, as on their compact size and cuteness; she keeps telling me how great they would look in her office.

So often, we as audiophiles, extol the desirability of synergy in a system, but seldom are specific recommendations made. Well, I have a suggestion as respects synergy and the Reference3 loudspeaker. Having used this speaker with a number of amplifiers so far (four actually), one amplifier stood out as far and away the superior with the Gallo; it was the Edge G6 ($3,995). Not lacking expensive power amps of impeccable quality with which to play these loudspeakers (Sierra Olympia, Pass X350 as well as others), it was the Edge G6 that stole the show when matched up with the Gallo speakers. And it was more than a "My, isn’t that a nice sound those two recreate." No, it was more like "Oh my, this is incredible. If I could only get all the BFS readers in the room to hear this!" kind of enthusiasm that rushed over me. I thought about great synergistic combos heard in the past like the Crown Joule with the LNPA 150 amps, the Counterpoint Solid Two with the Jovian Pillars, or the Symfonia Opus 10 with the Merlin VSM. Truly special pairings that excelled and crested the very good by being something special and basically inexplicably transcendent. I am of the opinion that the Edge/Gallo combination is very much in the excelling class. I would be remiss, however, were I not to include the fact that the homemade Lowe’s speaker cables were very much a part of the wonderful results attained with that amp and the Reference3.1

Sonic qualities. Quite frankly, I expect good sound from Anthony Gallo products. Over the years, certain persons in the industry have proven themselves capable of consistently making quality audio gear regardless of the price point chosen. It’s as if they have a "good music gene" that allows them to design equipment capable of capturing the essence of the music, as well as its energy and musical focus. It’s probably sufficient to say that some have "it", while most do not. Tony has "it".

Inasmuch as I don’t have the necessary equipment on hand to effectively utilize and assess the qualities of the second voice coil arrangement, this coverage will only look at the sonics of the speaker using the standard 3-way speaker cable hook-up. I’m hoping to be able to audition the "subwoofer", second voice coil hook-up at a later time.

That said, this is a wonderful little speaker. Even though the bass lacks the extension of some state-of-the-art contenders, the midrange and highs from the Reference3 makes most of the competition look like pretenders. Listening to this speaker conjures up enjoyable memories of the old Scientific-Fidelity Crown Joule; still, one of the finest speakers that I have ever heard.... but with some added bass energy.

Let’s get the bass out of the way: It’s good, but it’s not great - at least without the second voice coil hooked up. The lower limit on this speaker is about 40 Hz. That’s reasonably low for a speaker, but window rattling it is not. What the woofer on this speaker does best is make sure that the lower mids and upper bass do not thin out, or lose their body and presence. And it goes deep enough for most applications, especially in rooms that are not difficult to fill with bass energy (which my room kind of is). If it helps in making a buying decision (one way or the other) this speaker mates superbly with a sub of even modest aspirations; as long as the sub is capable of moving some air below 50 - 60 Hz. I mated the Gallo with a decent sub (M&K) and obtained excellent results, perhaps even better than those obtained with the RM40s. So, I’m talking serious stuff here. The speaker employs no equalization, and with the modest amount of air space for the rear wave, bass extension has no choice but to be limited. It’s a physics thing baby! The bass from this speaker will get you by nicely, until you get nutty and