but come at the expense of needing a high voltage power supply to supply the charge and an amplifier to buffer and magnify the audio. Electret microphone capsule schematic. wdwd [CC BY 3.0] The ...
The heart of the build is a preamplifier that runs off standard 48 V phantom power, and is responsible for both biasing the electret microphone element and acting as a buffer for the mic signal.
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