Frequency range s of digital noise s

Thanks Steve, I should have known that; since only a few companies have stressed power supply quality. FWIW, Alpha, Esoteric and Wadia come to mind. Also it may be why I have consistently found that isolation and conditioning have benefited every digital player I have tried in my Spectral system.

I am not a fan of conditioners, with one exception, the Plasmatron from VHaudio.com. This really improves SQ for digital. I use one and many of my colleagues use one. The Plasmatron is an AC voltage regulator, not a filter.

Filters on AC generally reduce dynamics, so I steer clear.

Isolation is the best solution, both for digital and analog. I use both, so I have no ground-loops.

Steve N.
Empirical Audio

Steve. I was just reading about the improvements of the Wadia 781 over the 581. Significant p/s improvements. Have you no idea what frequencies of noise are emitted from digital processors?