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XLR Female is a type of connector used for many professional audio applications. Originally designed by ITT Cannon, the most common configuration is a 3-pin connector for “balanced” audio signals. When male and female XLR connectors are mated, the design of the connector makes contact on pin 1 (ground) before any other pins. This prevents potential damage to the system. A balanced audio signal offers great protection against EMI noise, and can travel a long distance. For this reason, balanced lines using XLR connections are often used for microphones, mixers, amplifiers, and other pro audio devices.
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