Pioneer TS-W2502D4 10 In. Champion Series PRO Subwoofer with 3000 Watts 10-inch Champion Series PRO subwoofer with 3000 Watts maximum (800 nominal) power handling Basalt/carbon fiber reinforced IMPP cone with fiber-woven aramid surround Dual 4-ohm voice coil for 2 or 8 ohm operation 20 Hz to 150 Hz frequency response with 90 dB sensitivity 169.2 millimeter mounting depth