find a new ground, turn the gain down on the amp, or add this:http://cgi.ebay.com/PAC-Audio-SNI-1-RCA-Noise-Filter-Ground-Loop-Isolator_W0QQitemZ120311086905QQcmdZViewItem?hash=item120311086905&_trkparms=72%3A1234%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14