there is 6 speakers in the front, and 4 in the rear. the wires going to head unit it splits then in to 4 like front R, front L, rear R, rear L so i would have to take off door panels to do so. so some where the speakers connect for there to be 4 channels. also i noticed if i program the head unit to have no EQ sound won't cut out AS much. though when i but the window down for use turn single pretty much use any thing that uses electricity the sound cuts out. not sure if that helps narrow any thing down. if a amp will help I'm able to hook it up i have access to a few lower end amp if that would fix the problem.