3 Pin Xlr - su Amazon AdAmpia gamma di strumenti e attrezzature musicali. "3 Pin XLR Wiring Diagram, Cable Wiring, Etc." Volume Pot Wiring Diagram If you want the pot to turn in the opposite direction, pins 1 and 3 can be reversed. Be sure to always ground to the shell to avoid hum! XLR Wiring Standards, Diagram & Pin-out (3 Pin Audio & 5 XLR Wiring Diagrams and Standards, for 3 & 5 Pin XLR Connectors. Details on polarity, colour coding and wiring standards. DMX & Audio.