I have also been wondering about my subwoofer. I'm running a Rockford fosgate P3 ( Dual 4 ohm) in a q-logice type 2 sealed box that is facing the rear of the trunk. Its powered at 500 rms at 2 ohms by a 1000 watt kenwood amp. To me it sounds weak, almost no bass unless i got it cranked pretty loud. i have never heard one 12 inch sub running around the same power to compare it to. I'm worried the amp is not running full potential, because i had to open it up a few times to attach a ground, since the kid before me snapped off the terminal. This might be a dumb question, but can someone try to get me in the ball park on what i should experience from 1 12 inch woofer.