the problem you're describing may be caused by cable tv. Is it near by? If so you may want to try and disconnect the cable at its first point of entry. then check for hum in your system. if it's gone, all you need is a ground loop eliminator, such as Mondial Magic Box.
Ungrounding an Amp--Any Danger?
My integrated amp, a Creek A50i, has a bit of humming. I was about to experiment with removing the ground from my power cord when I saw the sign on the back of the amp that said "This apparatus must be earthed."
Is there any danger (to me or the amp)associated with removing a ground? I will gladly put up with a bit of hum if it means not getting shocked or frying my equipment.
Is there any danger (to me or the amp)associated with removing a ground? I will gladly put up with a bit of hum if it means not getting shocked or frying my equipment.