Planet Audio TQ100DVC 10-Inch Poly Injection Cone 4-OHM Dual Voice Coils DVC Subwoofer (Black) Power Handling (Peak) 300W , Power Handling (Contin.) 150W , Freq. Response 35Hz- 2.2Khz , Efficiency (1 Watt/1 Meter) 96Db , Impedance Dual 4 Ohm , Magnet Structure 80 Oz , Voice Coil Former 2" Mounting Depth -5-7/16-Inch 10-Inch Dual Voice Coil Subwoofer Black Poly-Injection Cone Butyl Rubber Surround Open Design-Inch Stamped Basket Dual Voice Coil  Custom Magnet Cover