Model : SPS-8SWS,10WS,12WS System: 8" Rubber Edge PP Cone Subwoofer Magnet:30 OZ Voice Coil: 2" KSV 4 layers Impedance: 4 Ohms Power: 200 Watts RMS,300 Watts Peak Frequency: 40Hz-2k Hz Senditivity: 87dB/M.W Carton: 53*53*30 CM Qty./Ctn: 8 pcs System: 10" Rubber Edge PP Cone Subwoofer Magnet: 40 OZ Voice Coil: 2" KSV 4 layers Impedance: 4 Ohms Power: 250 Watts RMS,500 Watts Peak Frequency: 38Hz-1.8k Hz Senditivity: 88 dB/M.W Carton: 60.5*31*39 CM Qty./Ctn: 4 pcs System: 12" Rubber Edge PP Cone Subwoofer Magnet: 50 OZ Voice Coil: 2" KSV 4 layers Impedance: 4 Ohms Power: 350 Watts RMS,700 Watts Peak Frequency: 35Hz-1.5k Hz Senditivity: 89 dB/M.W Carton: 38.5*38.5*44 CM Qty./Ctn: 2 pcs