Have you listened to Bryston SST family of amps?
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I've tried a number of SS amps and have listened to a number of tube and SS systems. I've yet to find an equal to the McCormack DNA-2 Revision A amplifier.
This amp requires a dedicated line for the dynamics to soar. And some to much of the 'lack of grain' comes from proper line conditioning and good ics and scs. That's assuming of course the amp itself isn't contributing audibly to the grain.
I gave up on solid state, after my last one, the Pass X-600. I have found much better performance with the new technology of the H2O Signature monos. They weigh a third as much, never get warm, let alone hot, draw just 10 watts at idle, and have brought my system to a point where I feel I can touch the performers.
Are you talking to me, or any of the above? I don't mind.
My speakers are the infamous, but fabulous, 1 ohm Apogee Scintilla. I like nonupsampling, and have a PSA Lambda transport feeding a highly enhanced Audio Note DAC. The preamp is a one of a kind class A, housed in two chassis.
Check out the H2O review by Audiofankj here:
And Strajan's review at 6Moons here:
Levinson, McIntosh, Moon?, Bel Canto's monoblocked, Classe mono's, Theta?, Bryston 14sst, Jeff Rowland?, Edge?, Halcro's !!
Krell and Pass can be revealing and/or "cold". Use caution.
Halcro's could be the ticket, but $$ and pretty neutral.
As always you can sway the sound of your amps with the right cables (copper for smoothness, silver for clarity or coldness,) and the PREamp. Try a tubed preamp with a ss amp. Might be great.
You have been clear that it is solid-state that you want, but is this because you envision buying an inefficient speaker like the mbl's? I ask because there is one tube amp that works particularly well with the big mbl 101, the CAT JL-3 (or the predecessor to that amp, the JL-1).
It is a very unusual design that was designed around the mbl 101 and that competes very favorably with massive solid-state amps. Here are a couple of links if you are interested:
http://www.high-endaudio.com/RC-Amplifiers.html (scroll down to "Class A")
I've had Rowland 9Ti's, Pass 600's (sold them to Muralman), Krell 750 Mcx's and now am totally delighted with my Boulder 2060. They can effortlessly drive anything, and now that I've paired it with the new ARC Ref3 preamp, I am in heaven. If you want more details on how the previous amps performed in my system, i would be glad to oblige. BTW, they're driving Dynaudio Temptations, which really love the power.
Which speaker did you try, how big is your room, and how loud do you usually listen? I have used a Bryston 3B-ST with Proac Response 1.5s, Magnepan MG-12QRs, and Dynaudio Contour 3.0s in a 13' x 16' room. I don't really crank it as my downstairs neighbors reported me for shaking a picture off their wall.
While I would not consider Bryston amps powerhouses for driving 1 ohm loads, they are certainly adequate with a lot of typical speakers.
At the time that I had those amps, I had Avalon Osiris speakers, which were a very difficult load to drive. The Pass' had excellent low-level detail, what I would call a "clean" sound. But, they were also lacking in the midrange with a thin, not very sweet tone. The Krells had much more tonality and richness and were much more musical,but didn't image or soundstage as well. The Boulder does it all: imaging, resolution, detail, rich musical sound. I have since changed speakers o the Dynaudios and there is great synergy . They love the power.