Amazon.com: PyleUsa 6.5” Slim Marine Subwoofer -150W 4 Ohm Waterproof Car Component Speaker System,Low Profile PP Cone w/Rubber Edge, 20 Oz Magnet 1" Voice Coil, for Custom Audio Boat Truck Mobile Vehicle (
Wet Sounds Stealth AS-10 Marine powered subwoofer — sealed enclosure with 10" sub and 500-watt amplifier at Crutchfield
JBL MS10LB Black 10" 750 Watt Waterproof Marine Subwoofer With RGB LED Accent Lighting - Rock The Boat Audio
Bluave M10s22 10" M Series High Power 600w Marine Subwoofer 2-ohm With 10" Universal Marine Sub Box Enclosure For Cars, Trucks, Powersports, Utvs, ... : Target