joined this forum for this thread after googling.. I saw enough people post that it makes me think it's a bug or somehow not isolated case.
i have this exact issue, it seems to have started a little after I got the amp new.
Symptoms:
- when i turn it on it will stay at the right volume
- adjusting the volume in either direction will then trigger it to "drift" lower volume ever so slowly until its muted (it is moving the knob itself)
- i have reset all my remotes, i have changed modes. It happens in arc, bluetooth, usb- so assume it happens in any mode (and thus is not a input issue)
- if i turn it off either hard or soft power button and turn it back on, it will stop drifting again until the volume is adjusted once more
- it doesnt matter if i adjust by hand with the knob or by external remote, once adjusted it'll drift down
- sometimes im able to stop it drifting by pressing volume down on the remote, about 30-50% of the time that seems to stop it continuing to drift lower
anyway this makes me think it's possibly a physical knob/mechanical issue but i dont want to open it as its supposed to be under warranty (though we will see what that really means in my location)