Solid State Power Amp Reviews

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Rotel RB-991 power amplifier

As a reviewer who has focused on seeking out high-quality audiophile gear for cost-constrained readers, I'm embarrassed to say that the flagship RB-991 stereo amplifier is the first Rotel product I've had in my house. (To be fair to myself, this 38-year-old family-owned company did not develop a large US market presence until this last decade.)

Classé CA-3200 three-channel power amplifier

The last Classé power amplifier I reviewed, back in November 2004, was the imposing Omega">http://www.stereophile.com/solidpoweramps/1104classe">Omega Omicron monoblock ($20,000/pair), which made glorious sound with the Revel">http://www.stereophile.com/floorloudspeakers/302">Revel Ultima Studio speakers. But things change. First, my reference speakers are now B&W">http://www.stereophile.com/floorloudspeakers/1205bw">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.

Krell Evolution 202 preamplifier & 600 monoblock power amplifier

Talk about going from the ridiculous to the sublime. One day I'm reviewing the $139 Sonic">http://www.stereophile.com/solidpoweramps/1006sonic">Sonic Impact Super T power amplifier, and the next day Krell Industries delivers their $10,000 Evolution 505 SACD/CD player, $15,000 Evolution 202 preamplifier, and their $30,000/pair Evolution 600 monoblocks.

Music in the Round #21

I've been tweaking my weekend multichannel system for years, but with my city system I've kinda faked it. I now realize that I listen more actively to the weekend system, and not only because that's when I have the time for it—the sound of that system is simply more engaging and psychologically immersive. So, with the growth of my library of SACD and DVD-Audio recordings to almost half the size of my CD collection, I told my wife that it was time to transform of "our" city stereo rig into a full-blown multichannel system.

Threshold SA-1 monoblock power amplifier

Eleven years ago, Threshold Corporation entered the high-end audio market with the first amplifier ever to use sliding bias (footnote 1) in its output stages. Some 10 years later, Threshold spawned another innovation: their so-called Stasis circuitry, which yielded the S-series amplifiers. The SA-1 and its lower-powered sister SA-2 are the latest from Threshold, and are the first Threshold amps to abandon sliding bias for straight class-A operation. Both use the Stasis circuit.

Portal Audio Paladin monoblock power amplifier

When most of us think about the folks who populate the high-end audio industry, we tend to conjure up the designers—the names above the titles, as it were. Or, in many cases, the names that are the titles: Richard">http://www.stereophile.com/interviews/688vandersteen">Richard Vandersteen, Jim">http://www.stereophile.com/interviews/221">Jim Thiel, Bill Conrad and Lew Johnson, Mike Creek, to name just a few.

Plinius SA-100 Mk.II power amplifier

Man, you've got to watch out for those preconceived notions—they'll kill you every time. For the last several years I've seen Plinius amplifiers at hi-fi shows and—even though I didn't know the first thing about the company or its products—figured that I knew what they were all about. Spotting their brawny façades festooned with feathery heatsinks, I smugly assured myself that they were some kind of antipodean pretender to the muscle-amp throne—Krell or Threshold wannabes.

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