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Old 24th Dec 2020, 12:20 pm   #2059
GrimJosef
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Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,310
Default Re: The Audiophoolery Thread.

Quote:
Originally Posted by Beardyman View Post
... He won't entertain things like ... shielded mains leads ...
Outside the equipment's case I'm with him there. But I've dropped the 50Hz background hum in a customer's equipment by more than 10dB by replacing the mains lead inside the box with a length of the screened stuff. It ran too close to the audio input wiring and the E-field pickup by the latter from the mains live conductor was what seemed to be causing the problem. It was a US piece of kit with the mains transformer primary split so it could be wired for 115V or 230V. I fear the manufacturer hadn't spent much time testing it at 230V.

Cheers,

GJ
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