How come a power cable changes the sound?

Read the various white papers and web pages at Vansevers.com Mike Vansevers is an expert on this subject.

The answer is we human beings have vivid imaginations and believe what we want to. You hit the nail on the head, the quality of the Romex wire int the wall can't be improved between the socket and the first component by an overpriced piece of wire. I love my PS Audio 300 and 600, but when they try to sell me a $600 piece of 6 guage power cord I know they're ripping me off. It's this kind of voodoo that makes reasonable people think audphiles are fools.

See 'fallacy of ac treatments' thread below. This subject evokes much emotion, to say the least!

Dtf, does it not occur to you that there could be something else relevant to the effect of a power cable than just its resistance? If you have tried various power cords and not heard any difference then say so - but insulting people that do hear a difference is less than helpful. It suggests you are either resentful of others or just wish to start a meaningless argument - when in fact you may indeed have something worthwhile to contribute.

I have tried a few lower end pcs and have found no difference although I am not saying that with the right cord a difference could not be realized. Its my opinion that an aftermarket pc unless properly filtered would only enhance or magnify the "noise" found in your home's power lines. Possibly using clean power, say from a PS Audio 300 or the like, would possibly bring greater results as opposed to higher end pcs. "Clean" power seems to be the best starting point after which pcs could be auditioned...just my opinion