TS-W311D4 - Pioneer 12" 1400W Dual 4-Ohm Champion Series Subwoofer
Alphasonik AS12DF 12" 1500 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure - Walmart.com
PIONEER TS-A301D4 12" 500W RMS C-SERIES DUAL VC 4-OHM CAR AUDIO SUBWOOFER SUB | eBay
Pioneer TS-W312D4 | Car Entertainment, Subwoofers, Champion Series Subwoofer, Champion Series Red Subwoofer | Pioneer Middle East - Car Stereo, Car Subwoofer, Amplifier
Pioneer TS-W311D4 Champion Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield