I apologize in advance to those who may recognize this thread. I posted a very similiar question a couple of weeks back. I have the PE #300-792. I built a sono-sub and flush mounted the amp to the tube. The problem: I get a humming from the amp that's driving be crazy. The hum is not from the driver. I had the amp out of the sub (no driver attached) and plugged directly into a wall outlet on the other end of the room. It still makes a humming sound. When I walk into my basement I can hear the hum and basically whenever there is no sound coming out of the speakers. Even on really quiet scenes on movies or TV. This sucks, because I've been really happy with the performance of the sub. Does anyone else notice any noise from thier amps? I did notice a slight hum with my old Energy 8" sub. Is their anything I can do or do I have to get used to it?