CERWIN VEGA SPRO122D Stroker PRO 4000 Watts Max 2 Ohms/2000Watts RMS Power Handling 12-Inch Dual Voice Coil The legendary STROKER PRO name returns as a limited edition subwoofer to commemorate Cerwin-Vega's 60-Year Anniversary! The new STROKER PRO utilizes a heavy industrial strength textured basket frame that is positioned on top of the high density triple-stacked, triple segment magnet. To reinforce the elevated motor structure on to the enormous magnets, side profile steel mesh straps are compressed and connected to anchor this massive subwoofer.