XLR Wiring Standards, Diagram & Pin-out (3 Pin Audio & 5 3 Pin XLR Wiring Standard. 3 Pin XLR connectors are standard amongst line level and mic level audio applications. The above diagram shows you the pin numbering for both Male and Female XLR connectors, from the front and the rear view. (the rear view is the end you solder from) Here are the connections on each pin: Pin 1: Shield / Ground; Pin 2 How to Wire an XLR to a 1/4" Jack XLR to 1/4" Mono Plug. The most comon way to wire a 3-pin XLR to a 1/4 inch (6) mono plug (sometimes called a jack plug), is to join the negative and shield together. This can be done by either soldering the shield and negative wires of the XLR to the sleeve of the plug... Xlr to Mono Jack Wiring Diagram | Free Wiring Diagram Collection of xlr to mono jack wiring diagram. A wiring diagram is a streamlined conventional photographic depiction of an electric circuit. It reveals the components of the circuit as streamlined shapes, and the power as well as signal links between the devices.