How to make and soldering your own RCA to unbalanced 1/4 inch TS jack cable - Do it yourself (DIY). With this type of audio cable you can simply hook up studio equipment or PA setup in your home. To do this soldering project you need a rca to rca cable, 1/4 inch (6.35mm) plug, they come in a range from a dollar price to tens of dollars per jack. This tutorial can also be used when installing an XLR connectors. And of course this is better than use 1/4" (6.35mm) to rca adapter.