LSK-664 .SIZE: 15" .MAGNET: 40 OZ (OD140mm) .VOICE COIL: 2"(ASV) .MAX POWER: 200W(RMS) .SENSITIVITY(1M/1W): 95dB .FREQUENCY: 45HZ-5KHZ .AIR GAP HEIGHT: 6mm .IMPEDANCE: 8 Ohm