The hum is getting to the point to where I would rather not have surrounds than have to hear a humming sound all the time. I have narrowed it down to line noise. The amp was always sensitive to extreme line noise but now it is very sensitive to the noise. I can turn on a light and the humming gets louder. The more lights I turn on the louder the humming gets. These are regular 100w bulbs not the curly fluorescent ones because those make the hum even worse. There are no dimmers on the line either. The line is at 122 volts so it is not starving the amp. I have a call into Outlaw and I hope we can get this solved.... I am wondering if it is common for an amp to get more sensitive to line noise as it ages?