Audeze claims 91 dB for 1 mW sensitivity for the LCD-2, equivalent to 103.2dB for IV at the specified impedance of 60ohm. In practice we measured 106.0dB at 1 kHz for 1V input, averaged for the two capsules, which suggests that Audeze's specification is actually rather conservative here. Although isodynamic headphones have acquired a reputation for being difficult to drive in this respect, note that this sensitivity is actually higher than that achieved by some high-impedance moving-coil designs and will cause no bother to any headphone amplifier worthy of the name.
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