LSK-671 .DIAPHRAGM: Aluminium membrane .MAGNET: 10 OZ(OD80mm) .VOICE COIL: 1"(KSV) .MAX POWER: 50W(RMS) .SENSITIVITY(1M/1W): 92 dB .FREQUENCY:1000HZ-18KHZ .SIZE: 267 X 100 x 189mm .IMPEDANCE: 8 Ohm