How to Wire an XLR to a 1/4" Jack - mediacollege 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... Or by soldering a Audio Tutorials · Video Tutorials 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.