I have an 06' unlimited with all factory speakers and an aftermarket cd player, when I have FM radio selected all the speakers sound good and the subwoofer nicely compliments my country music. However, when I play a CD or plug my IPOD in the subwoofer is non-existent. I was wondering if anyone else has had a similiar problem?? Or perhaps knew something more than I do about this. I have tried searching the forum for this with no luck, and I havent spoke with a stereo shop yet. I figure it's something internally wrong with the head unit, but wanted to ask ya'll before spending and potentially wasting money...thanx in advance!