While you would never plug a loudspeaker directly into an AC power system 1 , the amplifier that drives it must be designed to meet the challenges of an impedance whose magnitude can change by a facto...While you would never plug a loudspeaker directly into an AC power system 1 , the amplifier that drives it must be designed to meet the challenges of an impedance whose magnitude can change by a factor of ten across the audible range of frequencies.
