1.Impedance:8Ohm 2.Magnet:45OZ 3.RMS:300Watts 4.OEM is welcome 5.CE&RoHS Noninal Diameter208mm(8in)Niminal Impedance8ΩMinimum impedance5 ΩPower Capacity300Watts RMSSensitivity(1w/1m)94dBFreq. Range60Hz~6.5KHZVoice Coil Diameter50.6MM(2IN)Winding MaterialCopperForwer MaterialKaptonMagnet MaterialCeramicMagnet45OZ Fs37.5HzBI14.3T*MQms5.8Re5ΩMns27.5Qes0.31Vas9.8LLe0.49MhQts0.30Sd0.0201m^2X-Max:3.2mm ...