I just got a 480 watt Pioneer amplifier, and I am using it with my factory head unit and after-market Pioneer 280 watt speakers. I was wondering if I had to hook this baby up to the factory amplifier, or if I just bypass the factory amp all together?? I didn't know if the HU needed the factory amp with an aftermarket one. Also, how the hell do I hook the HU to the Pioneer amp?? The only input is RCA, but the factory HU does not have RCA jacks. How do I connect? I am pretty new at this, but I am learning something new everyday