Manual GENERAL SPECIFICATIONSNominal diametermm (in)100 (4)Nominal ImpedanceOhm8Minimum impedanceOhm6Program powerW80AES Power ratingW40SensitivitydB90Frequency rangeHz120 ÷ 11000Voice coil diametermm (in)25 (1)Chassis materialSteelMagnet materialFerriteMagnet dimensions OD x ID x hmm (in)80 x 32 x..