Hifonics HFX12D4BK 12" 12 inch Dual Voice Coil 4 ohm Car Audio Subwoofer | eBay
HIFONICS 12 in. 800-Watt 4-Ohm DVC Car Audio Subwoofer Power Bass Sub (3-Pack) 3 x HFX12D4 - The Home Depot
Amazon.com: Hifonics Alpha HAW10D4 –10 Inch Subwoofer, Dvc Car Audio, 1000 Watt, Dual 4 Ohm, 2 Inch Voice Coils with A Woven Glass Cone, Light Weight Sub : Electronics
Amazon.com: Hifonics HFX12D4 12-Inch 1600 Watt HF Series Dual 4 Ohm Car Subwoofers, Pair of 2 : Electronics
Hifonics MR8DUAL 2 X 20 CM (8 ") Dual Bandpass Subwoofer System 1200 Watt | eBay