Grounding RCA's

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fastone

Copper - Posts: 83

Joined: January 01, 2005

Location: United States

Posted: February 07, 2005 at 12:46 PM / IP Logged

When using RCA's with a ground, or shield as I would call it, would you connect one end of the ground or both? In using shielded twisted pair wire in analog signal applications most manufacturers recommend grounding one end, at the source. Grounding both ends can create a ground loop.

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bullman96

Silver - Posts: 294

Joined: October 03, 2004

Location: United States

Posted: February 07, 2005 at 2:38 PM / IP Logged

if you ground the deck in the same spot as the amps, i would do both ends. other than that, i see no point in doing one end

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fastone

Copper - Posts: 83

Joined: January 01, 2005

Location: United States

Posted: February 07, 2005 at 4:40 PM / IP Logged

The way it has been explained to me by engineers is that the shield acts as a drain to induced current from outside sources. If both ends are connected then you have a complete circuit, hence the term "ground loop".

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: February 07, 2005 at 5:08 PM / IP Logged

You are correct. I recomend grounding a shield wire at the amplifier end as this is usually easier, and leaving it disconnected at the source end. Unless you have significant EMI/RFI problems, there is usually not much need for seperatly shielded signal cables in a car...

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Grounding RCA's

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