Description: HD150NThroat diameter: 1"(25.4mm)Nominal impedance: 8 or 16ohmPower capacity: 150w RMSExponential horn (1w/1m): 92 dBFrequency range: 250 - 6000 HzVoice coil diameter: 2.6 " (66 mm)Installation method: 1"3/8-18N ScrewOuter dimension: 117mm X 67mmMaterial:Magnet material: NeodymiumVoice coil material: copper Voice coil former: kaptonDiaphragm material: phenolicEncasement information:Net weight: 1.83 KgMeans/QTY: 63 * 26 * 10 cm/10 PCS