Fletch, this calls for a bit of troubleshooting. Try connecting a cd player or ipod/mp3 player directly to the input on the subwoofer that you're currently using. Just connect one of the two stereo leads. This will help determine whether the problem is with the sub or the receiver. Play a song and then adjust the sub's volume knob up and down to see if you hear anything or see the speaker moving. If not, then the problem may be one of the internal fuses or the amplifier in the sub itself. If the sub fails the above test, give Axiom a call.