"Dave Plowman" wrote

For example, better designs might include having isolated
transformers, balanced design technology, regeneration of
the wave form, outlet isolation/open ground, provide for
special need of source/power amps just to prevent
electrical grid injection noise.

You must be referring to US stuff. All UK equipment
already has an isolating transformer. It would be illegal
to sell one without.

Please re-read the above paragraph. It's "transformers"...
that means plural in English.

plural adjective 1 more than one in number. 2 Grammar
(of a word or form) denoting more than one.

So that should read "a better *design* might include having
isolating transformers"?

I think you need a bigger shovel.