I would think that by law, if an amp required more than a 15 amp outlet could put out, it would have a 20 amp plug. AFAIK, this one does not. Sounds more like a design flaw to me than a problem with your house wiring.

Alan, I don't think we ever took it to 115dB when I was there--I'm pretty sure we topped out at 105, and that was quite loud enough for me.

I am the Doctor, and THIS... is my SPOON!