Time to buy a class D amp?



Will some new class D amplifiers outperforming the current ones appear soon

(the newest ones i know were released a  few years ago)?

Class D amps attract me as I consider them the most ecological ones with obvious non-auditionable benefits.

I have no doubts that they posses the maximum ratio performance/sound quality among the amplifiers of all classes.

At the same time, the sound quality the class D amplifiers that I have auditioned produce, although is quite good,

but not yet ideal (for my taste).


I use PS Audio Stellar S300 amp with PS audio Gain Cell pre/DAC with Thiel CS 3.6 speakers in one of my systems.

The sound is ok (deep bass, clear soundstage) but not perfect (a bit bright and somehow dry, lacking warmness which might be more or less ok for rock but not for jazz music).

I wonder if there are softer sounding class D amps with the same or better details and resolution. Considering two reasonable (as to the budget) choices for test, Red Dragon S500 and Digital Audio Company's

Cherry  2 (or Maraschino monoblocks), did anybody compare these two?



128x128niodari
George, 

I cannot affirm anything certain on this, but, perhaps, there is a doctor that already can already convince  the girl not to smoke, chain smoker is no more needed. The girl then would shine with her legs and face. 

According to Tommy O from Digital Audio Company, their module design is already fast enough so that there is no further need in GaN-based technology (used, e.g., in  Technics SE R1). I am citing  what  he wrote to me in this regard (please note that i am unable to judge on the technical part/proof for his statements):

citing : 

" I wanted to mention this before…. These GaN based Class-D amps have the same issue as other non-Cherry Class-D in that they are going for bench specs as opposed to sonic excellence. Without getting too into the technical aspects, GaN FETs require use of support chips that don’t support our unique topology, and our design is different in that it’s already super fast (the benefit of GaN is supposed to be speed). We are able to achieve better bench specs than any other Class-D we’ve seen, but we “tune” the modulation and control for best sound, and this costs a few dB here and there -- but sounds better. For example, the MEGA design can reach about 130dB and 0.0004% THD on the bench before tweaking for sonics. This is with non-GaN FETs. After tweaking, the specs are still great (120dB and 0.001% THD), but the smoothness is preserved, and the harsh/analytic sound of other amplifiers is not anything we want coming out of a Cherry Amp!! We are always getting compliments on sound quality, and this is the “proof in the pudding”. "
GaN based Class-D in that they are going for bench specs as opposed to sonic excellence.
I worry when a manufacturer says this, (trust me it sound better)

We are able to achieve better bench specs than any other Class-D we’ve seen
Then further down he says this????? (hang on he just said spec don’t matter)


The proof’s in the pudding when we see independent measured specs on.
what switching frequency used
output filter corner frequency
switching frequency residue on output
dead time performace
phase shift figures from 2khz to 20khz
rms output wattage just before clipping into 8ohm, 4ohm and 2ohm.
All of which are known Achilles Heel’s of class-d

Cheers George
@georgehifi, Tommy's MEGAschino MK2 specs into 2 Ohms;   MEGAschino channel boards are capable of comfortably driving 1000W into 4Ω and up to 2000W into 2Ω
Measurements of Tommy's old amps are online. No issues into 2 Ohm except a hit of hit on frequency response.
comfortably driving 1000W into 4Ω and up to 2000W into 2Ω
That’s way too vague. Just like Merrill quotes.
Ask him this, it should be done by independent bench testing, but he should tell the truth.

In stereo what is the RMS wattage "both channels driven just before clipping"into 4ohms @ 1khz

In stereo what is the RMS wattage "both channels driven just before clipping"into 2ohms @1khz

See if you get a straight answer, not even Merrill would give an answer to this and I asked 2 or 3 times on the Element 118’s (true monoblocks not bridged stereos) their was a dead silence with this like he never seen the posts, even though he happily answered many others I asked, and his amps are in a higher league than these I believe.

Cheers George