Eversolo just did an update that rendered my Dad's A6 inoperable via USB.
Same software/firmware as A8.
Affects McIntosh Integrated Amps with DAC cards. His 8950 was working fine , it updated and immediately after did not recognize DAC. In the rare even it does, it identifies wrong sample rate and makes a loud potentially damaging screech noise or chirps.
Also will not work with Chord and Accuphase. This problem has been an issue with those two brands, the problem with the Mc is new
To troubleshoot this I used a PC to stream qobuz to the 8950. Worked fine. Put Eversolo in my system. Immediately recognized the DAC played fine for hours.
Restored factory defaults , same problem with Mc. They were responsive at first but then lied about the issue, saying there are no known issues.
I pressed them to take it in because it will not recognize the USB drive with an older firmware. I told them it's 5 days from being out of warranty and they completely ignored me after that. Talking to the dealer I learned that he has 40 + units that are bricked.
I asked them to send me the file, they wouldn't. They said it's dangerous to roll back. Would not send file just notes on how to upgrade ...
Maybe I'm spoiled with my Aurender and Bluesound, but they have the worst support I have ever experienced in this hobby
There is no service center or any contingency plan when these fail.