I just got a used Pioneer AVR. I was using a Denon receiver where I connected the RCA L/R pre-outs to the inputs on the sub. No problems there.
In the back there is one SW pre-out, so I ran to the local Rat Shack and bought a 2 to 1 adaptor. Quick set up says "sub detected." I go through and select 4.1 speakers then it asks me to confirm. Nothing. Sub is on. On the front, there is "sub ch mode" button. I toggle thru on/auto/off. Nothing. Also on the back, there are Pre-outs for the surrounds/center/front speakers. I plug it in there without any adaptor, redo the set up procedure. Nothing.
Any suggestions? Thanks.