just got a aiwa cdc-x504mp and because of me being stupid i didnt find out the number of pre-outs (1 pair)which are already taken up by a 4 channel LA sound redondo 80. It has 4 rca outs for front(left and right) and back(left and right). Now i want to get the Audiobahn A8002T for a sub and i have no clue how to connect the two amps. Any help would be appreciated, thanks.