Focal 30a4 12" Single Coil Subwoofer 4 Ohm for sale online | eBay
Amazon.com: Massive Audio KILOX124-12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 1000 Watt RMS, 2000w MAX Dual 2 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
Klipsch Reference Series 12" 400W Powered Subwoofer black 1070408 R-121-SW II - Best Buy