First, you might want to make sure you're feeding it a signal that is going to produce output from the subwoofer - depending on the music being played, you may not have anything there to begin with. Here\'s something I've been tinkering with lately that might serve you well in that regard (hadn't planned to toss out a link to it just yet, but what the hell) - I don't know if the Denon will play DVD data burned to a CD or not (my OPPO is the only player I've used that does), but the audio CD will work for sure. If there's bass management working at the Denon, then the low frequency data in the left or right channel will steer to the sub.