So I just got a receiver. Obviously my first if I have to ask this question. The back panel has a "Sub Woofer Audio Out" and my Sub Woofer has a +/- Red/Black double wire connection. So I have two wires coming from my subwoofer and a receiver that wants a plug in cord. The manual is useless in explaining how to fix this problem. It suggests a Cordon Audio cord (which I somehow miraculously had). However, this doesn't help because there is nowhere to plug it into the receiver. Is there some sort of adapter that I will need? If not, why would anyone make a subwoofer that doesn't plug into any receiver and why would anyone make a receiver that doesn't accept any subwoofer. The mind - it boggles. Thanks in advance.