Why are they still hanging around in some setups despite being considered outdated? To understand that, we need to go back to ...

Ideal for connecting subwoofer speakers to audio ... such as stereo receivers or sound systems, while offering excellent bass response and flexibility. Low-loss, wide spectrum coaxial cable ...

RCA connectors are used for analog audio signals (see analog ... to amplify the sound. Only one cable was used as it carried a monophonic signal, not stereo. See A/V ports and phone connector.

Two-channel analog audio signals that use one red (right) and one white (left) RCA connector for wiring consumer electronics equipment. For higher performance, professional audio equipment may use ...