Cadence Acoustics S2W8D4.V2 4 Ohm 1000W 8" Subwoofer Power handling: Peak: 1000 W / RMS: 500 W High Excursion Double Laminated Foam Surround for High Speed Bass Response Expanded and Rolled Steel Basket Magnet Motor Heat sink with Heat Pump Cooling Technology Aero Style Oversize Magnet Motor Vent