Phone Connectors
The most common microphone connector in consumer use is the venerable phone connector, in 1/4" (6.35 mm), 3.5 mm, and 2.5 mm sizes, and in both mono and stereo configurations.
Not all microphone plugs that appear to be stereo are actually stereo. Many mono computer microphones use 3-conductor TRS 3.5 mm minijack plugs in order to carry other signals, such as bias power for an electric element, to or from the microphone.
Read more about this topic: Microphone Connector
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