Gustard X30 disappointment

Swapped only the ends on the dac, that proves the cable is good as well as the rest of the chain.

While it was working, did you like the sound?

I did, it was very nice, detailed without being bright, and not even close to being broken in.

@miles765 "Now I'm not sure if I want a replacement or just a refund"

I have couple of Gustard DAC products, despite 24/7 usage never experienced any problems.. Build quality and used components are top grade..

Did you try to contact Gustard service / support to report the problem and to get help?