I obtained a AudioSource SW 50, 8" Subwoofer from a friend and I need to know if there is any way to hook it up to my Receiver. I have an Onkyo TX-SR601 Reciever, on the back it has a Subwoofer Preout and another output under the DVD section of the reciever with the same connection. The problem is the the Sub only has the Red and White RCA outputs and the Black and Red wire outputs. And the reciever only has the 2 purple sub outputs, that I mentioned before. Is there anyway to get this thing working with the reciever?