Amazon.com: Hifonics BXS12D4 Brutus Shallow Mount Subwoofer (Black) – 12 Inch Subwoofer, 500 Watt, Car Audio System, 3 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures, Marine Grade : Electronics
Amazon.com: Hifonics Brutus BW-110A - 800 Watts Compact Amplified Under The Seat Car Truck Subwoofer Low Profile with Bass Remote, Great for Vehicles That Need Bass But Have Limited Space, Black :
Amazon.com: Hifonics HFX12D4 12-Inch 1600 Watt HF Series Dual 4 Ohm Car Subwoofers, Pair of 2 : Electronics
Hifonics Colossus Subwoofer CX12D2 Power 4000/8000 Watt for sale online | eBay