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240V "Tweak"

Posted by Lee of Omaha (D) on July 31, 2022 at 11:08:39

Most "tweaks" I take with between a grain and a mine of salt.

However, recently a customer came in and mentioned a tweak I can find no fault with:

If you (Americans and Canadians) have equipment that can be switched to 220V, get a line run to your listening area, and switch the equipment to 220V. Why?

The way electricity works at our homes is that it comes off the transformer at 240V with a center tap. The center tap is neutral, which is connected to ground at your circuit box. Each "half" of the 240V feeds half your circuits.

That means that any "hash" present is mostly common mode across the 220V and not common mode on either 120V line. So if you run your equipment on 240V, most of the hash, being common mode, cancels. This is the same reason balanced signals are superior to unbalanced, and why internet cables use twisted pairs with differential input at the receiving end.

My customer reports that the improvement in sound is better than any fancy power cord he's tried.

This post is made possible by the generous support of people like you and our sponsors:

Atma-Sphere Music Systems, Inc.

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