JBL Power P1220D 12" Dual 2-ohm Component Subwoofer at Crutchfield
JBL 428F Professional High-Power Dual 18" 1600W Passive 4281F
Amazon.com: Pyle 12' Car Audio Speaker Subwoofer - 1600 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 40 Ohm, 60 oz Magnet, 2
JBL Stage 1010 Subwoofer | 10" (250mm) woofer with 225 RMS and 900W peak power handling.