I have a portable DVD player in my S-10 that I have hooked up to my AUX port on my head unit, its a RFX9220G, I am picking up alternator whine on my DVD player only, the radio, MP3 player, and CD player work fine. I have 2 amps hooked up a 900W Rockford for my 10's and a 100 x 2 Memphis for my...