Do your lights dim when your amp powers up?

nope. thankfully. Hope you get it sorted though

Mine used to when I had a Pass x350. I don’t think I had a direct line for the amp at the time.  I kind of liked it. It made me feel like it was really powerful.

I now have an Audio Research Ref 160... no dimming. 

No but your and pretty much everyone panel and outlets may need connections tightened. All my systems are also exposed to salt fog so the extra love and attention. If it were me …..

I’ve had amps that flipped the circuit breaker if you powered both up at once. So it can happen.