What Is an RCA Cable?
RCA cables use round, push-in connectors with color-coded plugs. They carry analog audio and video signals between TVs, receivers, turntables, and speakers.
Color Codes
- Red: Right channel audio
- White (or black): Left channel audio
- Yellow: Composite video
- Green/Blue: Component video (Y/Pb/Pr)
- Purple: Subwoofer (single channel)
Common Applications
Turntable to receiver. A stereo RCA pair plus a ground wire.
Subwoofer connection. A single RCA cable, often longer and better shielded.
DVD/legacy TV. Three-plug composite sets (yellow/white/red).
Stereo amplifier. Red and white pair for left/right channels.
What to Look For
- Gold-plated or nickel-plated contacts
- Dual shielding (foil + braid) for subwoofer cables
- Solid copper center conductor for better signal
- Tight-fitting connectors to avoid hum
RCA vs Digital
RCA cables are analog. For digital audio, use coaxial or optical cables—though a coaxial digital cable looks similar to RCA, it has a different impedance (75 ohm).
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