Thats good. It must be the wire coming out of the computer to the back of the headunit. did you run line out wire with your power? if so try running it a different route away from that power wire. did you have a aux on the headunit or you used a hi-low converter? Also the quality of the wires you use will be a big factor. The cheap ones tend allow radiant noise. They are not shielded as well as the higher priced one. Let me know how it turns out.