Hifonics HFX12D4 12-Inch 1600 Watt HF Series Dual 4 Ohm Car Subwoofers, Pair of 2 12" HF Series Dual 4 Ohm Car Subwoofer Injected poly light rigid cone for excellent durability 1" NBR reinforced rubber surround provides large amounts of excursion Integrated one piece poly cotton spider Spade style speaker terminals