Stereo RCA Jack
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Stereo RCA jacks
RCA connections are the standard means of passing analog line-level (or "preamp-level") audio signals between components. RCA jacks are commonly found on most types of A/V gear: receivers, CD players, turntables, MiniDisc recorders, cassette decks, VCRs, DVD players, and more.
The audio inputs and A/V inputs found on receivers are RCA connections (though some A/V inputs may also include a different type of jack — such as S-video or component video — for the "video" portion of the signal).
Usually, RCA jacks, connectors and cables are grouped in stereo pairs, with one connection for the left audio channel and one for the right. However, some components (such as many powered subwoofers) use a single mono RCA jack for audio input and/or output.
(Note that a turntable's RCA jacks output a signal that's significantly different from standard line-level signals; hookup requires a specially designed phono input or an in-line phono preamp.)
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