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.

 

 

128x128pstores

@riccitone Yes they are nice and it is really confusing with the reviewers and the OE spec sheets. Just look at this review.

Gold Note is making some very nice audio equipment. 

 https://6moons.com/audioreview_articles/goldnote13/2/

@jerryg123 

Wow, hadn’t seen this 6moons article! Very cool, thank you 🙏🏼 

They really are making some nice stuff. 

@holmz 

some might still prefer the signal modified, or distorted, so that the 2nd/3rd harmonics were present.

Some of this may also bleed into people running tube preamps into SS/Class-D amps. 

And this is a truth.  I am such a one, for a variety of reasons.  I am also careful to consider measurements (defined widely) for a component's attributes, again, for a number of reasons.

@atmasphere 

If it walks like a duck and sounds like a duck, it is probably a duck. 

From Wiki;

Class-D amplifiers work by generating a train of rectangular pulses of fixed amplitude but varying width and separation, or varying number per unit time, representing the amplitude variations of the analog audio input signal. The modulator clock can synchronize with an incoming digital audio signal, thus removing the necessity to convert the signal to analog. The output of the modulator is then used to gate the output transistors on and off alternately. Great care is taken to ensure that the pair of transistors are never allowed to conduct together, as this would cause a short circuit between the supply rails through the transistors. 

So yes, Class D is more accurately referred to as a "switching amplifier" rather than a "digital amplifier" but things get blurred when binary quantization is involved as binary quantization is at the heart of digital too. 

I find it interesting that in order to "cut me down to size" you chose to seize upon my bad choice of nomenclature (when I in fact used BOTH within the same paragraph!) rather than comment upon the bigger points made in my post.

I will say it again also-I have no doubt that this is a very fine sounding amp. I would expect nothing less from a man of your immense experience, intellect, and knowledge. I just get my hackles up a bit when someone like our OP posts a sensationalistic thread title and then waxes on and on. You don't want to be equated with Tekton do you?

 

And this is a truth.  I am such a one, for a variety of reasons.  I am also careful to consider measurements (defined widely) for a component's attributes, again, for a number of reasons.

Me too @noske - my tube preamp has the 2nd at -75dB the 3rd at -90, and the 5th at -110dB.
My old preamp was predominantly 2nd harmonic.

My latest power amp is not too dissimilar - just a bit higher…
And the older tube amps predated Stereophile’s use of the AP test gear.

So they all look like what Ralph is describing, just we cannot see it.