- Oct 4, 2021
A part from the "methylated resonance" (I work in the biomedical field and this is the meaning of methylation: https://en.wikipedia.org/wiki/Methylation) I guess I understand what you are saying. Usually class D amplifiers are more analytical and that translates in a sound that is often described as "cold" (a forward and more distinct perception of medium-high frequencies). I guess that sound can be less pleasant for some users, and that the final results mostly depend on the speakers, the room and the room treatment. I must say that my Sabaj A30a full-digital class D amplifier does not sound "cold" at all (I would define it neutral) while my Denon DRA 800H class A/B receiver is probably more warm (more gentle with medium high frequencies). Not sure which one I like better (it mostly depends on the music I'm playing) although the Sabaj A30a is supposed to have much better measurements than the Denon DRA 800H (about 15 db difference in SINAD for the amplification section).The speaker in my system is a Monitor Audio SILVER 500 (6G), and my amp is a naim superunit. So I don't own an ATOM but at least the superunit might be better than the ATOM.
In my subjective listening, the PURIFI always had a cold, methylated resonance in the upper frequencies. But with naim superunit, the situation is the opposite and the music becomes much more enjoyable.
I think SINAD is not a perception of quality in listening to music. if it was, my purifi amp would be the first amp in my system right now.