I think the subs are in the rear doors . I can't hear anything coming from that thing under the rear seat either...?Does anyone know if there are adjustments that can be made to the amp on the JBL 10 speaker w/sub stereo sytem??? Specifically, I would like to turn up the volume to the sub woofer. Even with the Bass controll set at 5, I can barely hear anything coming out of the sub woofer. Even with the rear seat raised and my ear right next to the sub assy, it seems like its volume is at about 1/5 of the door speakers.