'profound ignorance of basic principles'  ???

you are obviously not one to mince words. Although you do seem prone to mangle words. 

I was not worried about the way electricity gets its job done, but about the effect of variablity of electrical supply on how hifi components do their job.  It seems that I am not alone in that worry.

As you may have picked up, I do not have educational qualifications in electrical engineering, but if someone does have such qualifications, I would hope that they could use that to contribute an answer, without making too much of a song and dance about it.  The ability to explain sometimes indicates understanding; the reverse also tends to be true.

If this is too gentle a rebuke, I am sure it could be escalated.