Right! My head unit has rca speaker outputs, so I'll need a pair of those. Then I need to tap into 4 speakers can I do that from the head unit just splice the wires from the and disconnect it from the head unit. So it goes from HEAD Unit to amp to speakers. Do you think it would be ok to not rewire the speakers and two just tap into them? Why do you say 4 rca patch cords and not 2?there's not really any room up front for an amp, its pretty packed behind the dash. you neglected to mention that you'll need 4 RCA patch cords from the stereo head to the amp, too, not just power, ground, amp control, and 4 pairs of speaker wires.