Originally posted by Mike Blakesley
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If you can't connect the transmitter to the same power socket and have no possibility to introduce a balanced connection between the player and the transmitter, then a ground loop isolator is the safest bet. Removing the ground from a device, while probably solving the issue, is not a safe option. We have a bunch of ART DTI ground isolators in stock, which we deploy once we need to hook something unbalanced and external up to an audio system. They usually work fine, without really noticeably impacting sound quality. They do attenuate the signal slightly though. Those ART DTI boxes might be in the $100 ballpark figure, but you'll be able to find cheap isolation transformers for $10 to $20 on Amazon.
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