DE620-8 includes post bolts160 W continuous program power capacity 1.4 -in horn throat diameter65 mm ( 2.5 in) aluminium voice coilTitanium diaphragm1000 - 18000 Hz response107 dB sensitivityNeodymium magnet assembly w / shorting copper capThroat diameter36 mm ( 1.4 in)Nominal impedance8 ohmsMinimum impedance 8.0 ohmsNominal power handling *110 WContinuous power handling *220 WSensitivity (1W / 1m) * 108.0 dBFrequency range1 - 18 kHzRecommended crossover * 1.2 kHzVoice coil diameter75 mm ( 3.0 in)Winding materialAluminiumInductance 0.14 mHDiaphragm materialComposite Polyimide / TitaniumFlux density 1.85 TMagnet materialNeodymium Ring