Pioneer TS-W3002D4 12 In. Champion Series PRO Subwoofer with 3500 Watts (Discontinued by Manufacturer) 12-inch Champion Series PRO subwoofer with 3500 Watts maximum (1000 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 188.8 Millimeter mounting depth