Why Expensive power Cables when Romex behind Wall?


Could somebody please help me to shed light on this?
Is there any reason I should invest in expensive power cables when there's low grade cable between my outlet and the wall? I've upgraded most other components in my systems, but I'm just not sure that spending several hundred dollars for power cables makes sense, when the cable running from my outlet to the wall costs less than $.10 per foot. Can anyone shed light on this?

Thanks!
boros
The logic of some above would make the use of fuel filters in
the car you drive.....well, stupid....ie: the gas you get is
so dirty..why try to clean it.

Or...the fruits, etc., you buy travel so many miles...why
wash them before you eat them?

Listen up guys........saying the cables you use in the last
link of the chain doesn't matter is like saying that the
signal broadcast by your local FM station is all there is..and that there is no difference in tuners......

Any link in a chain can be improved...and part of the high-
end is the fine tuning... This is what high-end wines, cars
and many other "things" in life are all about, that last
% of performance....without this pursuit by some very, very
good people..we could all be loving the sound of our 8-track
tapes.
This is an old subject. Just try a high grade power cord, borrow one from a friend or dealer. If you can hear the difference, great, if not, fine. I heard, and hear a major difference, major. There are many on the gon' that can give you theory about this. I simply tried it and was blown away.
No offence Boros as I was once a power cord skeptic myself-- but I get the impression that you haven't actually auditioned any PCs yourself.

Audiogon should have a regulation that no one can ask this question unless they have auditioned at least five decent power cords in their own system, IMO of course. I auditioned seven in a week and it cost me nothing but shipping. Do a search and read the interminable comments. Cheers. Craig
The same could be said anytime you're trying to purify "garbage" : poor recordings, poor source, bad room. I, too, used to be a skeptic. I was espically skeptical of all cables and even most CD players. most recording travel down a $16 XLR microphone cable somewhere during the recording process. Since that is the weak link, why should I bother using a better cable than that? (rhetorical)

Auditioning interconnects a couple years ago opened my mind to that. And recently contructing several DIY power cables have opened my mind that sometimes, a power cable can make a SMALL difference. Even with the junk in the walls.

Try some. You won't hear differences in all systems. This is like the last 0.00001% tweak of your system. But in some systems you will. Maybe yours isn't tuned that well. Or perhaps your ears aren't? Or perhaps you have the wrong power cord? Generally, if you can't heara difference - you have some other gross inadequacy in you system - that may or may not be due to the romex in the walls.

I would fathom of the increased (or reduced losses ;-) ) of better power_cords/outlets/iec_sockets tend to be a result of the improved grabbing ability of the connections in making a solid connection. "Hospital Grade" stuff in known for that. That's why we use stuff like that. Better connections.

And you're right. After power cords. You'll start playing with power condititioners. Then you'll start replacing outlets (might as well, <$10). Next you'll run a dedicated line, one each, for - analog, amplifers, digital gear. Heheheh.