LSK-668 .DIAPHRAGM: Aluminium membrane .MAGNET: 10 OZ(OD80mm) .VOICE COIL: 1"(KSV) .MAX POWER: 50W(RMS) .SENSITIVITY(1M/1W): 96 dB .FREQUENCY:1000HZ-18KHZ .AIR GAP HEIGHT: 4mm .SIZE: 365 X 181 x 221mm .IMPEDANCE: 8 Ohm