I agree with Johnmhunibch, I had a noise problem until I fixed the grounding problem. Do you have cable? If your cable wire is near your system, you need to take care of that. I use a device called MAGIC which connects to my cable line to help eliminate noise. Another cheap way to take care noise or grounding problem is to eliminate the ground completely by using an addapter that switches from 3 prong to 2 prong.
