LSK-663 .SIZE: 12" .MAGNET: 30 OZ (OD120mm) .VOICE COIL: 2"(ASV) .MAX POWER: 150W(RMS) .SENSITIVITY(1M/1W): 93dB .FREQUENCY: 50HZ-4.5KHZ .AIR GAP HEIGHT: 6mm .IMPEDANCE: 8 Ohm