I just finished building my first subwoofer and I am having problems getting sound out of the receiver. I have the RCA sub pre-out running into an art cleanbox then to a crown CE1000 via XLR cables and then to the sub with a speakon cable. I have tried a hard reset with no luck. I bypassed the receiver and put my ipod directly into the cleanbox and it worked fine. My old JBL sub is having no problems though, so I'm thoroughly confused now. My receiver is a Denon AVR-2807 if that matters.