I've had mine for a couple years and have had no issues whatsoever. TBH its the first issue ive heard over this amp as its known for being reliable, clean and detailed. Sorry you had that experience.

u/uqil one thing I might mention that I had one issue with the THX 789 and that I didn't realize it had an AUTO OFF SWITCH on the back and it confused the hell out of me at first when I'd leave the amp on and Id come back to find it turned off a short time later.

I would check to make sure your auto off switch is disabled if you are having issues with it turning off randomly. It took me some sleuthing to figure out what was going wrong.