Today many run their DACs directly connected to their class-d amps. I do. Amps with several 100 watts output and over 10A amps out.
I would guess that the signal ground in these amps are not the cleanest one could see. And here comes my culprit... the delicate ground in DACs where both clock ground and Vref grounds are tied up to the dirty class-d ground. Probably not ideal.
Why not make the PWM signal interface (red marking) after the "C" optical and let the input part float compared to the output stage. The only harmful part left sharing ground would be the triangle generator.
I bet such a combo of DAC and amp would be quite better sounding... what do You think?
//
I would guess that the signal ground in these amps are not the cleanest one could see. And here comes my culprit... the delicate ground in DACs where both clock ground and Vref grounds are tied up to the dirty class-d ground. Probably not ideal.
Why not make the PWM signal interface (red marking) after the "C" optical and let the input part float compared to the output stage. The only harmful part left sharing ground would be the triangle generator.
I bet such a combo of DAC and amp would be quite better sounding... what do You think?
//