Arfa Daily wrote:

"Eeyore" wrote

It 'might' be something else. You'll only tell by removing the output
devices (thankfully easy enough) and testing them but C-Audio have a reputation
for eating them. And will do so again if driven hard into 4 ohms.

You are right. One whole bank of FETs is o/c - hence the very asymmetric
output. There has been a further development. I rang the shop to tell him
the bad news that a set of twelve devices was going to set him back 100
quid, with the possibility of there being some o/c on the other channel (a
couple of them seem very cool under drive conditions, compared to their
neighbours, so a good indication that they may well be open as well)

That's what happens. The weakest or hottest fail first (open) and the relatively large ON resistance for these devices causes assymmetry in the delevered peak
voltage to the load.

Graham