Cadence Acoustics S1W12D2.v2 2 Ohm 900W 12" Subwoofer Power handling: Peak: 900 W / RMS: 450 W "M" Style Double Laminated Foam Surround for High Speed Bass Response Expanded and Rolled Steel Basket Magnet Motor Heat sink with Heat Pump Cooling Technology System Impedance: Dual 2 Ohm