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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

RE: Why would reversing AC leads reduce hum in a component?

If there is a potential difference (AC voltage) between the grounds for any two different electrical outlets serving the same audio system, there is a chance for hum. What you are hearing is that 60 Hz AC voltage expressing itself as a signal. Tre' can explain it better than I. The best and safest cure is to use only one outlet for the entire system or to use more than one outlet where the grounds are at the same potential. From what I have read, there is no such thing as a "safe" cheater plug, although most of us are lucky enough to get away with using them without electrocuting ourselves.


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  • RE: Why would reversing AC leads reduce hum in a component? - Lew 09:40:20 02/10/17 (0)

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