Features?2.5-inch,fibreglass inside-outside copper voice coil600 Watt continuous program power capacity?96 dB Sensitivity65-3500 Hz Frequency rangeNeodymium magnet allow a very yet powerful motor assemblyVentilated voice coil gap for reduced powerSpecificationNominal diameter? 250 mm/10 inPower rating? ?300W(AES)Nominal impedance? 8OHMSensitivity? 96 d BFrequency range 65-3500 HzMagnet weight? φ62×φ10×10Voice coil diameter? 65.5 mm/2.5 inDesign:Coil material? copperFormer material? Glass fiberCone material? PaperSurround material? ClothSuspension? single?Kind of layers? outside/insideNumber of layers 2Gap depth? 8 mm/0.31 inMagnet type? NEOMounting? And shipping? Info??Diameter :261mmScrew circle diameter: 246mmBaffle cutout diameter:233mmDepth: 119mmFlange and gasket thickness: 13mmAir volume occupied by driver:1.5dm3Net? wight :2.7KGS?Shipping Units:1 pcShipping weight:3.3KGS?Shipping box: 295*314*175 http://www.chinasoundspeaker.co...ch-400w-neo-speaker.html