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Message: <blockquote data-quote="McIntosh" data-source="post: 6160577" data-attributes="member: 605496"><p>AFAIK ground loops occur with weird combinations of components. You call it the RCA shield, I'll call it the ring (as opposed to the tip). It carries an audio signal and may or may not be grounded at either or both ends. Some combinations can certainly cause circulating curents (a ground loop). Millivolts make a difference when we're talking signal path. This is a hard row to hoe if you have problems. You may have to isolate your amp's chassis from ground altogether in extreme cases. I have run into this in industrial instrumentation. It can be a bear to chase down. Overall, your explanation was pretty good.</p></blockquote><p></p>

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