12" interfire PRO-V subwoofer | Chevy Silverado and GMC Sierra Forum
Power 12" T1 4-Ohm DVC Subwoofer | Rockford Fosgate ®
Amazon.com: Planet Audio AC12D 12 Inch Car Subwoofer - 1800 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, For Truck Boxes and Enclosures, Hook Up To Amplifier : Electronics