I have 2 amps one MTX 200 watt 2 chan and an Alpine 800 watt mono. the alpine goes to 2 JL audio subs and i just put the mtx in today. I wanted to run the mtx to the SPeakers in my back door which are alpine type s but i cant get the mtx to not play bass. I want the speakers in the back to have sound and not just straight bass. my headunit is a pioneer premier DEH-P630 it has 3 sets of rcas.Preamp/RCA Outputs 3 Pairs - Front, Rear, and Subwoofer. The apline is hooked up to the subwoofer outout and the MTX hooked up to the rear. so my Question is how do i get the MTX to play all sound not just the bass.