MODEL NO.: CSW-1004 10" high power subwoofer Voice coil: 3 inch Alu basket Glass fiber cone wih rubber edge Magnet: 2x150OZ SPL(dB): 90dB Imp: 4ohm Max power: 500W RMS power:250W Freq Resp: 35--3000 MODEL NO.: CSW-1204 12" high power subwoofer Voice coil: 3 inch Alu basket Glass fiber cone wih rubber edge Magnet: 2x200OZ SPL(dB): 93dB Imp: 4ohm Max power: 1000W RMS power:500W Freq Resp: 30--2500 MODEL NO.: CSW-1504 15" high power subwoofer Voice coil: 3 inch Alu basket Glass fiber cone wih rubber edge Magnet: 2x250OZ SPL(dB): 93dB Imp: 4ohm Max power: 1500W RMS power:800W Freq Resp: 30--2500