KICKER S15L7 CAR AUDIO 15 INCH L7 SUB SUBWOOFER 2000W - (item 140144418634 end time Aug-12-07 18:13:16 PDT) this ill give you enough bang
I used to have a JL 15W4 in a custom ported box...this is the box but the JL died before I got pics...this MA Audio sub pounded pretty hard for taking 900 watts when rated at 600