Clarion WQ2510D 10" Dual Voice Coil 4-Ohm Subwoofer Outside Dimension9-25/32 Inch Mounting Depth5-15/32 Inch Enclosure Size0.4-1.2 ft Max Power Handling1500 Watts Continuous Power Handling500 Watts Dual 4-Ohm Heavy Duty Voice Coils Aluminumized Composite Dust Cap Reinforced FRP/ Paper Cone Design Nitrile Butadiene Rubber High Excursion Surround Dual Strontium Ferrite Magnets Hyper Extended Vented Pole Piece S.E.T. (Spider Exhaust Technology) Cooling Dual Gold Plated Terminal Blocks Custom Stamped Steel Powder Coated Chassis Frequency Response30-1000 Hz Efficiency82 dB/W/m Basket TypeStamped Steel Number of Voice Coils2 Impedance4+4 Ohm