Cut-Throat
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- Joined
- Feb 15, 2020
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This is typical gound loop problem. Not a particular issue with any one component. It is a system issue to do with how everything is grounded and connected together. Replacing RCA interconnect with balanced should fix it. Most likely your power line device was putting noise onto the mains wiring (that is how it works after all) which then coupled into the ground loop.
I suspect something similar for @Markmosk although the source of the noise is most likely something else.
Sure, but what if 'Balanced' connections aren't available? --- I've been through this hundreds of times over the last 20 years. Ground Loops are often present and people just don't hear them. So, they think they're fine.... They're not! --- For the Blackest Backgrounds I lift ALL of my Grounds and Protect ALL of the Devices with a GFCI, which is far safer than a circuit with Ground Plugs and No GFCI. This is not my opinion, but a Statement from the N.E.C. regarding 2 Prong Installations that want Ground Fault Circuit Protection. Especially important if you have High Efficient Speakers.. Like Horns at 115db.