How can power cords make a difference?


I am trying to understand why power cords can make a difference.

It makes sense to me that interconnects and speaker cables make a difference. They are dealing with a complex signal that contains numerous frequencies at various phases and amplitudes. Any change in these parameters should affect the sound.

A power cord is ideally dealing with only a single frequency. If the explanation is RF rejection, then an AC regeneration device like PS Audio’s should make these cords unnecessary. I suppose it could be the capacitance of these cables offering some power factor correction since the transformer is an inductive load.

The purpose of my post is not to start a war between the “I hear what I hear so it must be so” camp and the “you’re crazy and wasting your money,” advocates. I am looking for reasons. I am hoping that someone can offer some valid scientific explanations or point me toward sources of this information. Thanks.
bruce1483
stevemj, in yer second post to this thread, ewe say it all, & i'm sure everyone who feels power cords make a sonic difference wood agree w/ewe. you say:

"...If your Purist cord does improve the sound it is because of some phenomenon outside the known laws of science..."

NO KIDDING!!! so stop denying what others hear, yust cuz yer science is so INADEQUATE!!! is yer science's INADEQUACY why yure so afraid to listen yerself?

jordan, in yer recent post, ewe yump all over kitch29, saying:

"Your lack of knowledge of science, electronics, audio, the definition of a theory, EVERYTHING that you mention in your diatribe is so staggering as to be beyond comprehension. The number and magnitude of fundamental errors in your post is truly frightening"...."You'd be wise to take a beginning science or engineering course, and get at least a modicum of understanding (rather than just pretending to) before spewing forth as you just did. It's really quite embarrassing."

the only ting frightening or embarrassing is yer response to his post. basically, all he's saying is what stevemj said, only it took him a bit longer... ;~)

i suggest *ewe* wood be wise to go thru his post & refute each of his "fundemental errors" one-by-one, before condemning what he says in such an off-hand, non-descript, rhetorical & rude fashion.

doug s.

Thank you Trelja for relating your experience. These musicians went into this test with healthy scepticism, and were drawn closer to the performance by the (unexpected) improvement.

This appears to be identical to what many of us experience with pre recorded media in our audio systems. In either case, getting closer to the music is an experience that you won't give up, once you have a taste.
Doug will be pleased to know that JHunter did apologise, thank you JH. I understand why scientists get so excercised about attacks on their understanding of the physical world: at the trade schools like M.I.T and CalTech, they don't get any philosophy or literature to broaden their understanding of reality. Newton and Descartes called themselves "natural philosophers", an appelation more in line with attempting to find the causes of observed effects. The natural philosophers had a better grasp of their limitations.
Today, "scientists" are trained to "believe" in "physical laws". If you can measure it, it's true.
Textbooks discuss things like the "discovery" of the electron but no one's seen an electron, only the tracks they leave. But electron theory explains those tracks and so there is science until Schrodinger, Planck and Heisenberg come along and stumble across "quanta" which behave differently. So they invent quantum mechanics that explains that behavior within the confines of existing electron theory. The math works,the observable phenomena conform to the math and once again we have "science". What we don't have is fact, only theory.
Now theory is a wonderful thing. Electron, or Quantum Theory is really good at predicting things that can't be seen or otherwise verified. But Theory by it's very nature is open-ended and that's why it's valuable. When theory becomes a belief system, that's when things get messy and natural philosophers become techies. Or as I like to call them, acolytes.
Now, while us Audiogoners were slinging electrons at each other, 2 Israeli teenagers, a 4 month old Palestinian and lot's of others were killed over a belief system. That's cause for anger. Kinda puts power cords in perspective, yes?
It also makes you wonder what this discussion would be like if we are all in a room instead of safely ensconced behind our keyboards?
I do heavy, physical work all day. Anybody wanna fight?
Thank you for your comments Albert. You are quite correct. My friend was sceptical, and his bandmate had no idea at all about wire. His feeling was that there were no gains to be made via something like this. Now, both are not only believers, but unwilling to give up these gains. My friend has been opening his eyes to our hobby(and how to merge it into pro audio) to the point where he may just join me at the Hifi show in New York City this weekend. I call that a metamorphosis. I only wish the nonbelievers or "flatlanders"(I told you that they are anything but objective to me) would open their ears and minds to the differences brought about by wire(and analog, and electronics, and tubes...). Perhaps all they need to do is to go out and listen.
Doug - I don't have any fancy line cords. I will try the following experiment. I do have a 100 foot very ordinary extention cord. I have heard people report that even changing a 6 ft cord to a 3 ft cord made a difference. So, I will run my system thru 100 ft of cheap cord and see what happens.

I suspect that if I hear a difference people here will belive me. If I don't hear a difference people will assume that my system is bad or my hearing is bad or that after 6 ft of cheap line cord it can't get any worse.

Which brings up a question. Just how low does the distorion of ones system have to be before it becomes possible to hear the additional problems caused by cheap line cords.

And, science is what makes the marvelous equipment we have possible. Scientists and engineers understand and design amplifiers, preamps, digital and analogy recording and play back technology. Non-scientists make line cords and speaker wire and can't explain how even they work.