Either one single RCA cable from the black RCA jack on the receiver to either one of the inputs on the sub. Or you can get a Y connector to hook the single RCA cable to both of the RCA jacks on the sub.
Ok, connect 2 speaker wires to the receiver's main speaker out-puts and have them hooked up to the sub's speaker wire in-puts. Then take 2 speaker wires connect them to the sub's speaker wire out-puts and hook them up to your main speakers.
Well I tried that with my Sub but my Sub does normal sound too now. But im not using that sub. Im using a sub that only has 2 wire connections for input only. I have no output connections to send the sound to my main speakers. Is there a way to take a RCA plug a splice it to make connections for red/black?
No you can't use the RCAs because it sounds like your sub isn't powered. I say if you really need to use THIS sub. Connect it to the B channel speaker connections on your receiver. So the front speakers would be on the A and the sub would be on the B channel.
I have a similar problem. I want to replace the speakers on my cheap disk changer which has traditional 2 black/2 red speaker wires, by channeling it into my surround sound. I know I will only get sound from the two front L/R channels but I really want to replace the big old speakers. How do I switch from the 4 red/black wires to either rca or 1/8" adapters? Thanks