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. "3 Pin XLR Wiring Diagram, Cable Wiring, Etc." "3 Pin XLR Wiring Diagram, Cable Wiring, Etc." XLR-1/4" Wiring Connect the XLR's Pin 1 to the XLR ground lug and to the 1/4" ground Connect the XLR's Pin 3 to the 1/4" Tip . Preamp Tubes - Improve The Sound Of Any Tube Guitar Amp In An Instant! Preamp tubes are rated in percentage of output. The higher the percentage, the hotter the tube.