Atma-Sphere Class D… Amazing

Today I picked up my Atma-Sphere Class D Amps. These aren’t broken in yet. And they are simply amazing. I’ve listen to a lot of High End Class D. Some that cost many times what Atma-Sphere Class D costs. I wasn’t a fan of any of them. But these amps are amazing. I really expected to hate them. So my expectations were low. The Details are of what I’ve never heard from any other amps. They are extremely neutral. To say the realism is is extremely good is a gross understatement. They are so transparent it’s scary. These amps just grab you and suck you into the music. After I live with them some and get them broken in. And do some comparisons to some other high end Amps Solid State, Tubes and Class D’s, also in other systems I’ll do a more comprehensive review. But for now, these are simply amazing amps.. Congrats to Ralph and his team. You guys nailed on these.





Can you comment on the fullness and tonal richness of the A-S Class D amps in your system? So many of the new generation of Class D amps (whether GanFET or MOSFET) receive praise for their resolution but are rarely described as outstanding in terms of warmth, smoothness, and richness of tone. I'm thinking of the naturalness and realism of voice and stringed instruments (especially guitars and upright bass) that emphasis tonal quality in the midrange and bass. My personal tastes value tonal balance over high-frequency pyrotechnics, but not everyone shares my tastes.

Thanks for any further thoughts based on your extended experience with the A-S Class D amps. 

Thanks for any further thoughts based on your extended experience with the A-S Class D amps. 

@sdl4 There is a review in this month's (June 2023) HiFi+ magazine. The reviewer had given us a very nice review of our M-60 triode OTLs about 2 years ago. He does make some comments of comparison. In both cases he was using the DeVore O96s.

@atmasphere  Thanks for letting me know about the HiFi+ review. I was able to track it down, and it presents a very positive view of the sound quality of the A-S Class D amps. Going forward, these monoblocks will be high on my list of amps I'd like to audition in my home system. Are you still planning to build a version with somewhat higher power output?


I would also be interested in higher power monoblocks, something in the range of 400 to 500 Watts into 4 Ohms. I want to be able to crack the foundation when the urge arises.

I hope Atma-sphere are successful with the new class D amps. This is certainly well-deserved. I love my MA-1 amps, and have learned to live with them, using NOS tubes, turn them off after listening, and so on. The best advice I got from Ralph was to match them with optimal speakers. Is this the case with the new class D amps too? Before the MA-1s, I had the huge Krell FPB600, and was told that it could drive "anything". That wasn't quite true, however.