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.




@ johnh

Thank you for your fantastic post.  Surely this type of post with so much personal experience with a good number of the most relevant currently produced amps is literally the definition of advice that "money can't buy."  No pro review I've ever read (that I can think of) has so much valuable info for direct comparison.

Amir @ Audio Science Review has good test gear and has tested the Purifi.  Purifi tests at the very highest level as does an amp I referred to and owned.  Oh, if we could only read test results and make purchases based solely on these tests!  But we can't because I owned one of those amps and Ralph's class D is at least 1.5 to 2 clear steps up the food chain in audio performance.  (Maybe Ralph's class D would test similarly but I won't be surprised if it does not.)

I recently had here a superb $40k DAC and pair of class A $60k/pr mono blocks.  I know the designer, who told me personally that he could improve the DAC's static test specs but would not because it would degrade its audio and musical performance.  

Maybe we should ask @atmasphere ? And avoid descending into extension cords, which have nothing to do the power cords on these amps...

Power cords affect audio equipment due to voltage drops occurring at 60Hz but also at much higher frequencies.

The more feedback you have in an amplifier the greater its ability to reject anything that isn't the signal, such as noise,

As a result, the class D is relatively unaffected by power cords at low power levels. But as the power is increased the power cord would be more important. It will not affect the amp nearly so much as power cords affect our tube amps!

Well, Ralph has outdone himself and shipped my new Atma Class D amps (with black face plates) sooner than thought. As I am in the middle of putting all my gardens to bed and hopefully overwintering the non hardy material, I have to put their installation on the back burner for a little while.

The amps are a bit more compact than comparable Class A, A/B amps, but are quite heavy, -Something I was not expecting, as many Class D amps seem to be quite smaller than these. But, I haven't had any experience with other Class D amps and have relied upon only visual depictions.

Once I get them 'run in', I hope to visit my dealer, John Rutan, and schedule a time to demo them, and compare them with other amplifiers.-Of course, if Johnny is willing. I really want to do this as I have heard so much about Class D, and know Ralph is a great designer who would only release a product if he felt it to be of deserved quality.

Who knows, maybe my MA-1's will be for sale, soon.