LSK-665 .DIAPHRAGM:TITANIUM .MAGNET:20 OZ(OD115mm) .VOICE COIL:1.75"(KSV) .MAX POWER:100W(RMS) .SENSITIVITY(1M/1W):105 dB .FREQUENCY:750HZ-20KHZ .AIR GAP HEIGHT: 5mm .SIZE: OD350 X 245mm .IMPEDANCE:8 Ohm