Pioneer TS-W311D4 Champion Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Pioneer TS-W311D4 (tsw311d4) 1400W 12" Champion Series Dual 4 ohm
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
TS-W311D4 - Pioneer 12" 1400W Dual 4-Ohm Champion Series Subwoofer