Manual General SpecificationsThroat diameter mm (in) 25,4 (1)Nominal impedance Ohm 8Minimum impedance Ohm 6Program power (1) W 30AES Power rating (2) W 15Sensitivity (3) dB 107Frequency range Hz 1500 ÷ 18000Voice coil diameter mm (in) 25,4 (1)Magnet material FerriteCoil material CCAWFormer materia..