when I switched from USB to coax via the Eitr on my Hegel HD25 DAC it was probably the most satisfying upgrade I've done to my system. And that was initially using a basic BJ coax. A few months later I happened to have the chance to borrow an AQ Carbon coax. I expected nothing much, but gave it a shot anyway. It took only seconds to confirm that the AQ made a substantial difference for the good. I sold my BJ coax and have never looked back.
