Now I just want to get this strait, if I get an aftermarket Head Unit then I'm going to have to run speaker wire from the deck to the speakers?? Then I'm better off getting an outside amp if I have to go through all that crap. The reason I ask if it is needed is because all I did was hook up my buddies new deck to all of the factory wiring harness and it sounded great. I would rather not run speaker wire if I didn't have to.