Solid State Power Amp Reviews

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Robert Harley, J. Gordon Holt  |  Apr 09, 2019  |  First Published: Jan 01, 1990  |  6 comments
In 1988, Bob Carver set out to design the best amplifier he possibly could, without regard for cost. It was more of an ego exercise than an attempt to build a product with wide commercial appeal. The result was the four-chassis, $17,500 Silver Seven.

Interestingly, Bob Carver chose vacuum tubes to realize his dream of building the ultimate power amplifier. The Silver Seven uses fourteen KT88 output tubes per channel, and puts out 375W into 8 ohms. Bob built three pairs of Silver Sevens, not expecting to sell many at the $17,500 asking price. When those sold quickly, another 10 pairs were manufactured. Now, demand is so great that Silver Sevens are built in groups of 30 pairs.

Michael Fremer  |  Jun 25, 2019  |  42 comments
CH Precision's massive, versatile, technologically sophisticated, 165 lb M1.1 power amplifier ($54,000 configured for stereo) can easily crush your foot if you're not careful when installing it. But the more important consideration is this: Can this cool gray techno-square sing and dance without stepping on its own feet?
Wes Phillips  |  Aug 21, 2005  |  0 comments
"You're reviewing a class-D amplifier?" whined John Atkinson. "I hate measuring those."
Paul Bolin  |  Mar 11, 2006  |  1 comments
Lord Acton said, famously, that power corrupts and absolute power corrupts absolutely. If there ever were an amplifier to test that maxim's applicability to audiophiles, it is surely the Chord SPM 14000 Ultimate Monoblock. Priced no less than $75,000/pair, the SPM 14000 is rated to produce power as do very few other amplifiers on the planet: it is very conservatively rated at 1kW into an 8 ohm load, 2kW into 4 ohms, and "will easily exceed" 2800W (give or take a few watts) into 2 ohms.
Michael Fremer  |  Mar 20, 2009  |  0 comments
High-tech, compact, and lightweight, Chord's entry-level SPM 650 power amplifier ($4995) promises robust power output, low distortion and noise, flat and ultra-wideband frequency response, and bulletproof reliability—all in what seems an impossibly small package measuring 16.4" wide by 3.4" high by 13.8" deep and weighing only 22 lbs.
Larry Greenhill  |  May 06, 2020  |  First Published: Dec 01, 1985  |  13 comments
Classé Audio's DR-3 once again brings to the fore the issues of class-A vs class-AB, weighty vs small and efficient, and brute-force expensive vs clever and inexpensive.

A well-worn, if unproven, audiophile rule of thumb says that a small, quick amplifier will sound better than a very powerful one. Among low-powered amps, those that operate in "pure" class-A are thought to be sonically superior. Pure class-A means the amplifier must run a constant high bias (more than one ampere), so the output devices never turn off.

Larry Greenhill  |  Mar 26, 2008  |  First Published: Nov 26, 1994  |  0 comments
I think every audio reviewer hopes for a surprise—when a good, but not outstanding, product is refined by the manufacturer into something special. The review then becomes an exciting discovery, reaffirming the pleasure one takes in good audio, and in listening to music being reproduced as it should be. It makes the listening exciting and the writing easier. The Classé Fifteen solid-state stereo amplifier is just such a surprise.
Martin Colloms  |  Jan 05, 2007  |  First Published: Feb 05, 1997  |  0 comments
Canadian manufacturers enjoy a special relationship with the US market. Though technically their products are "imports," a high level of trade harmony, plus a common continental location, mean that Canadian designs tend to be equably priced in contrast to those exported to the States from overseas.
Kalman Rubinson  |  Feb 18, 2007  |  0 comments
The last Classé power amplifier I reviewed, back in November 2004, was the imposing Omega Omicron monoblock ($20,000/pair), which made glorious sound with the Revel Ultima Studio speakers. But things change. First, my reference speakers are now B&W 802Ds. Second, my system now has three front speakers, supplemented by two B&W 804S speakers for surround sound. While a quintet of Omicrons would undoubtedly be dandy, five such monoliths would take up so much space that I'd be wondering about their effects on the room's sound. With so many channels, it seemed time to investigate whether a multichannel amp could carry the load.
Brian Damkroger  |  Jan 07, 2001  |  0 comments
"Be careful what you wish for, or you just might get it."
John Atkinson  |  Mar 09, 2011  |  8 comments
On the face of it, the power amplifier has the simplest conceptual task of any audio component. Fed an audio signal at its input, all it has to do to satisfy the demands for current made by the loudspeaker is to modulate a high-voltage voltage supply with that signal. Yet power amplifiers vary enormously in their ability to perform that task without editorializing. As a result, when I find an amplifier that appears to step out of the way of the music in the manner I desire, I make the commitment, I buy it, and I stick with it.
John Atkinson  |  Jun 24, 2020  |  31 comments
Canadian audio manufacturer Classé Audio was founded in 1980 by engineer Dave Reich and entrepreneur/audiophile Mike Viglas. The name "Classé" was a pun on the fact that Reich was a firm believer in an amplifier's output stage operating in class-A, where the output devices never turn off (see sidebar). Though the brand was established with the 25Wpc DR-2, the first review of a Classé amplifier to appear in Stereophile, by Larry Greenhill, was of the later DR-3, in December 1985. No fewer than 22 reviews of Classé products are available in our free online archive.
Brian Damkroger  |  Jul 13, 2003  |  0 comments
Have you ever had one of those conversations with your Significant Other that begins "But I thought you said..." and goes downhill from there? The Other's tone is condescending, and the body language—hands on hips, head slightly tilted—lets you know you're in big trouble.
Kalman Rubinson  |  Nov 21, 2004  |  0 comments
Non-audiophile friends and relatives raised their eyebrows when they saw the Classé Omega Omicron monoblocks. Not only is the Omicron more expensive than any other amp I've used; at 108 lbs, it's heavier than some of the speakers I've used. The Omicron is Classé's next-to-top-of-the-line amp in its Omega series, but is still definitely a "statement" product. Brian Damkroger reviewed the Omicron's big brother, the Omega Mono, in the July 2003 Stereophile. I refer you to that review for a more detailed description of the Omicron's basic circuitry.
Jonathan Scull  |  Mar 28, 1999  |  0 comments
What fascinates me about the High End are the electric personalities behind it. Manufacturers typically invest so much of themselves in the products they make. It's a divine madness—they do it because they have to. They're driven to it with a real sense of mission and excellence. But God forbid you criticize any of their offspring...ooo-la-la!

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