XLR connector - Wikipedia
https://en.wikipedia.org/wiki/XLR_connector
WEBThe XLR connector is a type of electrical connector primarily used in professional audio, video, and stage lighting equipment. XLR connectors are cylindrical in design, with three to seven connector pins, and are often employed for analog balanced audio interconnections, AES3 digital audio, portable intercom , DMX512 lighting control, and for ...
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