XLR to 1x RCA
When connecting a 3-pin XLR to one RCA, you use the same wiring as if you were connecting an XLR to a 1/4″ (jack) plug.
The positive and shield of the XLR are joined together, either at the XLR end or the RCA end. The easiest way is to solder a link between pins 1 and 3 (shield and negative) of the XLR, rather than trying to solder the shield and negative wire to the sleeve contact of the RCA.
This produces an unbalanced audio cable.
Audio Cables and Connections
Audio Cables
Audio Connectors
XLR to 1/4″ mono jack
XLR to RCA
Stereo jack to 2 x RC
XLR to stereo jack
XLR to 2 x RCA