Pioneer TS-SW841D 8 In. Shallow-Mount Subwoofer with 500 Watts Max. Power Eight-inch Shallow Series subwoofer with 500 Watts maximum (120 nominal) power handling Composite IMPP cone with interlaced carbon fiber and glass fiber 4-ohm single voice coil design 30 Hz to 1500 Hz frequency response with 85 dB sensitivity 2-1/2-inch mounting depth