Ok, first of all I am not a car audio know it all, My stereo consists of a alpine cda 7941 HU, mb quarts dkd 5x7 door speakers , 2 12" w6's JL, and sony explode 600w x 4, and a orion xtr2400 sub amp. my question is that my HU has a sub pre out, the rca's that are connected to the sub pre out go...