Certificate of Compliance

For the most common use, a standard plug is provided at both ends of the wire, with a central male end surrounded by a ring, which is sometimes abandoned for flexibility.The device is fitted with a jack and has a small hole in the middle surrounded by a metal inner ring.The diameter of the outer ring of the socket is smaller than that of the plug to allow the plug to stay in place.The socket is filled with an insulator between the inner and outer rings, usually plastic.

Compared with other types of terminals, RCA terminals are used for different purposes than they were originally intended, including as power terminals, radio terminals, and speaker wire terminals.It is widely used as AV terminal (terminal for composite video), but its impedance matching performance is poor.RCA terminals and wires are also commonly used to transmit S/PDIF digital audio, distinguished by orange plugs, also known as "coaxial lines".