i have a 2000 mustang and i tapped into the rca cables in my trunk. i used a FAI-3A line out converter. attached that to my amp with rca cables. wired a aw1206t sub to the a8000t amp but it doesn't work! i have never wired a sub to an amp before but i think i did it right. i did it in parallel. i put it from the postive on the amp to the positive on the sub. then soldered into the end of the wire going into the + on the sub and attached another wire and put that to the other +/. i did the same with the -'s. but no sound is coming out. the amp has power. please help!!!