How come a power cable changes the sound?


A good power cable definetely changes the sound but how ? A cheap 2,5 mm copper cable comes upto wall outlet and comes through a fuse (which has very thin wire) than we add a huge heavy power cord which cost 500$ than the sound of the equipment has big improvement What is the technicial logic and magic out of that ? Thanks..
oatalay
Power cable? Another wire mythology? Dtf, I think you're on to something. Question: Who said power cables change the sound? I remember reading of an audio writer at one of the audio shows. He asked a well known cable carnival man how his multi-hundred-dollar-a-meter speaker cable would be superior to a copper bar soldered directly to the amp and speaker. The carnival cable man could not say.
Remember your above words regarding insults.// Smart questions more often tend to have that very same effect.// If you hear it, does it matter to you if it's really there?
Apologies Waldhorner. I am getting really tired and testy of the "I cannot hear it, so you must be deluded" brigade, that demand scientific proof from a chat forum. We have had a barage of this negativism in recent weeks and I have stupidly (whoops, must apologise to myself now) entered the fray to try and beat it into retreat. It is a pox on this forum. If you don't hear it, then fine, say so and your opinion is recorded. Let others express theirs. If everyones' opinion here had to be accompanied by scientific proof we would get NOWHERE - like this post is going nowhere and the several others of its kind elsewhere in Audiogon. You have evry right to choose whose opinions to guide you - that is most of what I see such forums as this providing. You may claim that you are merely asking for an explanation, but the real message in the negativists' posts is that those that hear differences [that they do not hear] are deluded, and that without scientific proof, should be ignored. And by the way, if it affects my enjoyment of the music, then to all intents and purposes it is "there" - being existentialist about it is meaningless. Waldhorner, if someone manages to develop a convincing explanation as to how a power cable can change the sound, what will this do for you? Will you suddenly let yourself hear the difference? Or will your experience predominate? In which case, what good is the explanation? If the explanation has nothing to do with the differences in sound that I (and others) hear, what good is it? The existence of an explanation does not necessarily help.
Get real !! I built a number of Do it Yourself power cords, and other audio cables with Belden cable and Pass & Seymour, Hubble, etc combinations. And I must say, the results are not good. My motto is that I spent this much money (+40K) on my audio equipment, I am not taking any short cuts on do it yourself stuff. There is a reason why that Belden cable is $.50 a foot, because it's Crap. Let the pros build the cables and same as the other categories. We can also build $10K speakers and amplifiers for about $1000, but guess what it will not sound as good. You are kidding yourself if you think all power cords are created the same and sound the same. If that was the case why don't we build our house too ourselves, it may cost only $20K in material for a 200K retail. I am a realist and sick and tired of the so called Mythology. Go for it all you McGyver's wanna be !!