Solid State Power Amp Reviews

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Brian Damkroger Posted: Jun 14, 2013 17 comments
In the September 2005 issue (Vol.28 No.9), I reviewed Simaudio's first reference-quality power amplifier: the 1000W, 220-lb Moon Rock monoblock ($37,000/pair). At the time, the Rock was a dramatic departure for Simaudio, then primarily known as a maker of midpriced gear that was good for the money. I found a lot to like about the Rock, concluding that while it wasn't quite up to the standard of the best superamps of the time, it was very good—and, for Simaudio, an admirable first shot at the state of the art.
John Atkinson Posted: May 26, 2009 0 comments
When I reviewed the Moon Evolution P-7 preamplifier ($6900) from Canadian manufacturer Simaudio in March 2009, I was impressed by the qualities of both the audio engineering and the sound. It was a no-brainer, therefore, to follow that report with a review of the matching power amplifier, the Moon Evolution W-7. In March 2006 Kalman Rubinson reviewed Simaudio's Moon Evolution W-8, which offered at least 250Wpc into 8 ohms (I measured 310Wpc at clipping). The W-7 looks identical to the W-8, but is 10 lbs lighter, offers 150Wpc into 8 ohms, and retails for $8900 compared with the W-8's $13,500.
Kalman Rubinson Posted: Mar 17, 2006 0 comments
The W-8 ($10,200) is the first of Simaudio's Moon series to incorporate the new Evolution cosmetics and new circuitry. I loved its predecessor, the Moon W-5, which was one of the first power amplifiers I reviewed for Stereophile (March 1999, Vol.22 No.3). I also loved the "new and improved" W-5 when I wrote about in the May 2001 issue. In the September 2005 issue, Brian Damkroger praised Simaudio's monstrous Moon Rock monoblock, a contemporary of the Moon Evolution W-8 stereo amp.
Kalman Rubinson Posted: Mar 07, 1999 0 comments
I first saw and heard SimAudio's Moon amp and preamp at WCES two years back, and something about their aesthetics appealed to me: Canadian ruggedness coupled with a decidedly French panache. I remember that those attributes also characterized the demo's sound, although I can't recall the speakers or the sources involved. At succeeding shows, it gradually dawned on me that the Moon components were the fixed elements in a succession of impressive demos.
Brian Damkroger Posted: Oct 01, 2005 Published: Sep 01, 2005 0 comments
For years, I thought of Simaudio gear as good-sounding, attractive, and modestly priced, often describing it to friends as "really good for the money." The $5500 Moon Eclipse CD player, which I reviewed in our April 2001 and April 2003 issues, stretched the "modestly priced" descriptor a bit, but its sound was still, I thought, really good for what it cost, and I adopted it as a reference. Simaudio expanded the Moon series and eventually discontinued its older, less expensive Celeste brand, but, I thought, its products could still be described as "really good for the money."
Michael Fremer Posted: Jan 10, 2002 0 comments
If your audiophile habit goes back more than a couple of decades, you're probably doing a double take looking at the Smart Devices 2X150VT. Looks like a Hafler DH-200, doesn't it? That's because, at its core, a Hafler DH-200 is exactly what it is. Smart Devices doesn't name names in its brochure, but they do say that "You may recognize this amplifier as one of the dominant premium performers of the 1970s and '80s"—a reasonable enough description of the MOSFET-output DH-200, which combined outstanding sound with a very reasonable price—especially if you built the kit.
Michael Fremer Posted: Aug 12, 2011 1 comments
That is not a typo. The company is named Soulution—as in soul commitment to designing and manufacturing the finest audio gear it knows how, as in souldiering on in the face of skeptics who can't imagine why a power amplifier that puts out 130Wpc into 8 ohms or 260 into 4 ohms should cost $45,000, or weigh as much as a small pickup truck.
Larry Greenhill Thomas J. Norton Posted: Sep 02, 2010 Published: Oct 02, 1984 0 comments
James Bongiorno, the engineer behind the Sumo Andromeda, has enjoyed a long and colorful career as an audio amplifier designer. He has cast himself at times as an enfant terrible, exploding at audio critics and running scandalous advertisements (footnote 1). His best-known amplifier is the Ampzilla, produced by Great American Sound, but he also designed the Dyna 400. Currently Jim is living on a boat and serving as part-time consultant to the Sumo Company.
Corey Greenberg Posted: May 06, 2007 Published: Apr 06, 1991 0 comments
What's in a name? Quite a bit, when you stop and think about it. Would you rather have prostate surgery by Dr. Steadyhand or Dr. Whoops? Names imply a lot, even if we don't consciously make the connection; that's why your Polo shirt was made by Ralph Lauren instead of Ralph Lipshitz.
Jonathan Scull Posted: Aug 16, 2013 Published: Nov 01, 1995 0 comments
Things didn't start off auspiciously. I'd been after Symphonic Line's Klaus Bunge for more than a year to send me the Kraft 400 Reference monoblocks. Finally he called. He said he was going to be in town for a few days, and he had with him a pair of what he described as his "traveling" Kraft 400s, which he proposed to leave with me.
John Marks Posted: Sep 28, 2003 1 comments
Let's start with some music—three discs I recently have been using to evaluate equipment as well as listen to for enjoyment. They are as contrasting in style as one could hope for, but all on an enviably high musical plane. (Space considerations compel brevity approaching that necessary to sell screenplays to producers at cocktail parties, footnote 1)
Jonathan Scull Posted: May 12, 2002 0 comments
As we all know, it's the sound that counts. However, good looks enhance pride of ownership, and Theta Digital's class-AB, 400W Citadel is as handsome a monoblock as these jaded eyes have laid eyes on.
Michael Fremer Posted: Mar 21, 2004 Published: Mar 01, 2004 0 comments
Monoblock power amplifiers seem to be moving in and out of my listening room faster than green-onion salsa from Chi-Chi's. Over the past six months I've had the Parasound Halo JC-1, the Halcro dm68, the Pass XA-160, the Musical Fidelity kW, and now these 300W (into 8 ohms), $4500-each beauties from Theta Digital. All of these amps sounded as different as they looked, which was no surprise; too bad the "measures the same, sounds the same" dogmatists remain open for business.


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