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Best practice is to connect XLR pin 2 to TIP (T), pin 3 to RING (R). Pin 1 is always GROUND. The TN, RN, GN, refer to TIP NORMAL, RING NORMAL, GROUND NORMAL, which would have additional pinouts if they were available on the connector. A "Normal" circuit is one that passes the current UNLESS a plug is inserted to break the connection (break the "NORMAL.") ...


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