The RCA connector was introduced in the 1930s by the Radio Corporation of America (hence the name). Also known as a "phono" connector, it was designed purely for mono audio—just a single channel ...

The connectors on RCA cables typically come in red, white, and yellow. Those colorful connectors aren't just there for show; each color has an important function — ensuring the correct ...

RCA (Phono) Connector The plug's 1/8" by 5/16" prong connects the signal wire. The outer shell is ground, which connects to the sheath that wraps around the signal wire.