An RCA connector is maybe the most frequently used electrical cable to carry analog audio and video signals.

I have a "computer" 5.1 surround system that uses RCA cables to connect the speakers. Is it a good idea to use the existing speaker wire to connect my rear speakers by splicing RCA jacks onto the ...

Speaker wire is basically "zip cord", two conductors bonded together by the insulation, both conductors being used for a single channel.