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Dedicated mains supply unexpected result

I have a dedicated consumer unit supplying my Hifi as I know a lot of audio enthusiasts have. It was installed a couple of years ago and has rendered excellent sound quality.

l recently had my house electrics checked out and the electrician said I should install a heavier cable from the house mains inlet. It was rated at 70 amps and it should be 25mm sq, 100 amps. The copper cable in both cases is the standard UK domestic quality.

The replacement work has been carried out, however the sound quality has deteriorated, less powerful bass and a shrillness added to higher frequencies. Neither of these issues existed with the original supply cable. Nothing else has been changed in the system.

Anyone experienced this phenomenon?

dctom

Showing 1 response by erik_squires

erik_squires
16,564 posts
 

I assume that the work done was more than just a wire replacement but that you also had a new panel installed?

Get something like the Quille plug in voltage tester (9 pounds) on Amazon and watch it while playing music.  Pay attention to the Neutral to Earth as well as the Neutral to Hot voltages.

It could very well be a noise issue caused internally.  Try turning off every other circuit in the home to attempt to localize the problem.

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