I have tried a few. CJ Premier 140, Rogue, Audion 845, Altec 1570B, Atmasphere Class D, Dartzeel NHB108.
It finally took a small shop builder to blow the socks off me to hopefully settle on an endgame amp.
Back up a little. I was introduced to Jazdoc years ago by Joe P (RIP). Joe needed an electrician to wire Jazdocs room. And so it began my Electrical dive into powering audio systems. Anyhow, Jazfocs system struck me. I never again heard the chest of a sax player. Or their lips working the reed. I always thought it was the Daedalus speakers.
Cut to the PNWAF this year. Scott with Found Music, the designer and builder of the amp Jazdoc uses was visiting and brought amps for people to listen too. I was one of them. About 4 or 5 songs in and I was confident what was playing in my room exceeded every display I heard at the audio show. All of them reguardless of price. I bought the amps that night at dinner. I should have my pair in about 5 weeks. In the interim I sold my Dartzeel.
FWIW this amp does not sound SS or class D. It sounds tube. But OMG, its absolute magic. The details, life, natural preaence are unmatched by anything I have ever heard.
I don't know what it is about modern electronics today. Tube and SS have sort of blended into a very similar sound. Hard to tell them apart. The Found Music Blade amp is more like a large bottle amp pusing horns. A very different type of detail. Another selling point is its 55 watts using 2 x KT88. Yea yea, you don't like a KT88. If I have to toss the power tubes every 3000 hours, Im only out $250 for both monoblocks. The mercury vapor rectifier and driver are about $40 each and last 10,000 hours.
FWIW, Scott of Found Music has influenced my electrical work. Because of him, when I strip and rebuild a panelboard before sale, I polish the surface to surface contacts to a mirror finish. Something he does to every lead in his amps. Its a detail that matters.
So long story short, I am back to tubes and confident I wont ever have to change again. I feel done. Time to focus more on tuning the room with double drywall, multi glaze windows, floor supports etc.
Rex