Why Are Microphone Cable Connectors Called “XLR” Connectors?
XLR Connectors, the three pin connectors used on most microphone cables, was originally manufactured by Canon Electric, a US based company founded by James H. Cannon, and was initially known as the “Cannon connector”.
The original series of connectors was known as the “Cannon X Series”
Subsequently Cannon added a latching mechanism (the “L” in XLR)
Finally, a rubber insulating material was added around the contacts, adding the “R” designation.
Cannon X series connector with Latching Mechanism with Rubber insulator
The XLR type of connector can have more than 3 pins and is used for many audio and power applications.
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