The amount of current needed which can go through such impedances is high. Probably it's around 350k at 20hz or even more. On higher sound volumes, amplifiers tasked to deliver higher voltage and as the voltage goes higher the amount of current required to have full 20-20khz extension goes higher too.Įlectrostatic headphones have very high impedance, for example 007's impedance is 170k at 10khz. The current that amplifiers can deliver determine how capable they are in driving electrostatic headphones. You probably wouldn't find it's sound very pleasant though. Even Stax 252S can make your headphones can go very loud. Multiplying voltages is actually easy for amplifiers. For electrostatic amplifiers, voltage is all that is really required for volume.
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