i should of been working on the ground loop but i was locked on the fading situation.
so i doubled check with my friend that did the wiring, and he told me that on day 1 and 2, the fader was working right. at this point in the game, i think something in the mtx reQ5 is messed up. i say it is the mtx req5 and not the amp is because when i pulled the rear rca outs, the rear speakers were still working. if the mtx req5 was working 100% correct, and i pulled those rca's out, it would cut the music out. i think i am going to order another one and hope it is that little box.