I just bought and cosmetically restored an Acoustic 360/361PP stack and I couldn't be happier with it except for the fact that there's kind of a bad hum coming from the power amp. I assume it is 60-cycle hum because the "pitch" of the hum is roughly a B flat and B flat is about 60Hz. Honestly, you can't hear any trace of it at performance volume, but I would still love to get rid of it nonetheless. I am by no means an electrician, but I would like to know what I have to do/replace to get rid of it. I tried searching, but I got no results, so I figured I'd start a new thread. Thanks for your help!