Amazon.com: DR DOUBLE ROCK CB08 Under-Seat Subwoofer Car Audio 600 Watts 8 inch Slim Powered Subwoofer with Built in Amp Active Compact Subwoofer with Amplified+Bass Volume Control Knob : Electronics
Bose Professional AMS115 Compact Subwoofer | Full Compass Systems
Aquatic AV Compact Subwoofer
JBL CONTROL SB2210 - COMPACT DUAL 10" SUBWOOFER, BLK Compact, Low Profile, High-Power Subwoofer with 2 x 250mm (10 Inch) Woven-Fiberglass Cone Drivers. 500 Watts Cont. Pink Noise Power Handling (2000W peak),