Preamp/interconnects cause amp problems?

@erik_squires I honestly have no idea. I asked if I should get a Variac or something and he said no. In fact the tech said he wasn’t totally convinced it was a power issue. I know zero about amp building but that struck me as odd.
Essentially what was happening was, in the middle of the night while the system was off (save for the amp) loud popping sounds we coming from the speakers. I quickly flicked the amp off. It would start again once I turned it on and then 2-3 seconds later speakers popping loudly again.

after I got the amp back the first time the tech said they repaired the short and put it on the rack for a week then booked up a source and speakers and played it Iin the shop for a day. I only got it to play for a few hours before it started again.

it’s headed back to me and though my current amp has been fine I’m worried I’ll have the same issue again.

@dletch2 he did confirm the issue then repaired what was shorted and sent it back.  When I sent it back again he confirmed it happened again but couldn’t see what the cause was. So he pulled
and replaced the boards and the power supply. I’ve not paid a dime so far and I did offer to pay some shipping but he refused.

I just don’t want this to happen yet again because of something on my end. 

@dletch2 that was my thought as well. I just want to be sure. I haven’t popped a speaker yet and don’t want that streak to end