Best Solid State for Avalon Isis


I would appreciate informed comments regarding best solid-state synergy with Avalon Isis. I’m looking for an amp that will maintain absolute control of deep bass, while maintaining a rich and dynamic mid-range, and clarity without sacrificing musicality. It should be transparent, and allow a vast and layered soundstage to appear. Although the Isis appear relatively efficient (90db at 4ohm), the paired 13” woofers are going to need an amp with muscle.

Source is a Wadia 9 series. It runs direct. It does not need a pre-amp.

I listen to big, loud, congested orchestral music (ie. Mahler, Bruckner, Wagner). I like to hear all the detail, including the musician's technique and subtle alterations in tempo. Orchestral sections need to have mass. I want to feel the bass at low in addition to high volumes.

My room is 20 x 30 ft, and has plaster walls/ceiling with wood floors and padded area rugs. Tubes are not an option. Because of the room and source, I am not looking for an amp that is artificially fast or tipped toward the higher frequencies.

A company which is solvent, established, reliable, and with good customer support is important, with preference for an American manufacturer. I plan on trying to home demo some of these, but need advice on where to concentrate and expend my efforts.

These are some I'm considering, and additional suggestions are welcome:
Pass Labs XA200.5
Boulder 1050 Monoblocks
Halcro DM78
Spectral DMA 360
Edge NL Sig One
Hovland Stratos

Thank you,
Rob
rtn1
Lamm M2.2 hybrid monoblocks should be on your list. My friend with similar musical tastes uses them with his Rockport Antares speakers.

(FYI: they do have one 6922 tube per amp, so technically they are not a "true" solid state unit, but only having one tube makes them very easy to retube. In addition, they usually are listed as a solid state amp, if the categories are either tube or solid state, with no hybrid being a third category.)

They are among the best amps I have ever heard, (regardless of being tube or solid state), and they have a rock solid, deep bass response, and are quite powerful. With that one tube, they manage to impart a sense of life to the music that most solid state amps seem to lack, IMHO.

My two cents worth.

PS He also used these same amps on his Avalon Eidolons, prior to getting the Rockport Antares. They sounded great with them too!