Pyle PLBW84 Blue Wave 8-Inch 600-Watt High-powered Subwoofer Blue Injection Molded Cone Non-Fatiguing Big Rubber Suspension Blue Chrome-Plated Stee Basket Bumped Vented Extended Pole Piece Silver Plated Terminal Flat Progressive Spider New Wave-Like Rubber Gasket Rubber Magnet Boot 1.5'' High Temperature Dual Kapton Voice Coil Magnet Weight: 60 oz 600 Watt Max Power Handling Impedance:4 Ohm (Per Coil) Fs:60, Qms:5.23, Qes:0.89, Qts:0.76, Vas (Cu ft)2.394 SPL: 83.5dB Overall Diameter: 8.8'' Mounting Depth: 4.28'' Sold as : Unit Blue Injection Molded Cone - Flat Progressive Spider - 600 Watt Max Power Handling - Mounting Depth: 4.28'' Non-Fatiguing Big Rubber Suspension - New Wave-Like Rubber Gasket - Impedance:4 Ohm (Per Coil) Blue Chrome-Plated Stee Basket - Rubber Magnet Boot - Fs:60, Qms:5.23, Qes:0.89, Qts:0.76, Vas (Cu ft)2.394 Bumped Vented Extended Pole Piece - 1.5'' High Temperature Dual Kapton Voice Coil - SPL: 83.5dB Silver Plated Terminal - Magnet Weight: 60 oz - Overall Diameter: 8.8''