i was wondering if anyone here was running a single 12" under the back seat of a 2004 or so extended cab...i got a ten in a qlogic box, but the box is vibrating now, and is totally cramping my style...and I mean without raising up the back seat, because i am way too lazy to do that. i am running an alpine pdx 5 channel amp that runs 300 watts RMS at 4 ohms, if you have a suggestion for a subwoofer.