Features?3-inch,fibreglass inside-outside copper voice coil700 Watt continuous program power capacity?97 dB Sensitivity65-3500 Hz Frequency rangeNEO magnetVentilated voice coil gap for reduced powerShorting copper cap for extended HF responseSingle? spider suspensionDie cast Aluminum ChassisSpecificationNominal diameter? 250 mm/10 inPower rating? ?350W(AES)Continuous Power handling: 700WNominal impedance? 8OHMSensitivity? 97 d BFrequency range 65-3500 HzVoice coil diameter? ?75.5 mm/3 inch?Winding material: copper?Former material : glass fiber?Winding depth :12 mmMagnetic gap depth: 10 mmFlux density :1.25T?ParametersResonance frequency : 59HZ?Re: 5.2 ΩQec:0.27Qms: 4.3Qts:0.26Vas: 22.0dm3Sd:320.0cm2Xmax: 6.0mmXvar:5.5mm?Mms:47.0g http://www.chinasoundspeaker.co...ker-with-neo-magnet.html