ManualGENERAL SPECIFICATIONSNominal diametermm (in)250 (10)Nominal ImpedanceOhm8Minimum impedanceOhm7,7Program powerW500AES Power ratingW250SensitivitydB87Frequency rangeHz40 ÷ 500Voice coil diametermm (in)61 (2.4)Chassis materialSteelMagnet materialFerriteMagnet dimensions OD x ID x hmm (in)140 x 7..