Why power cable effect overall syste sound?

I can speak from experience with the pioneer elite, had the venom from Shunyata in mine for some time and it made it even better than it was as far as the picture goes.

We tried upgrade power cords on the Pioneer Elite and Sony XBR to find no difference in picture quality.We use isolated transformer power conditioners on our gear and keep the power cords away from the other cables.I imagine this helps out quite a bit since we get some nasty power from our utility provider.Of course others will have different experiences.

Has anyone ever taken the time to go back and compare their chosen after market power cord to the origial power cord after extended listening? Sometimes we can hear a bigger difference by going back.
As I have said before, I have tried numerous power cords and I hear the difference. However, I prefer the original power cords everytime.
There is no doubt that manufacturers select power cords. I owned a 200 watt Levinson amp that came with a huge power cord. The power cord on my Quicksilver Silver 90 monos had a very small power cord similar to a lamp cord. So, it is obvious these products are voiced with the supplied power cord.
I have owned a lot of older Audio Research gear and I love it because their cords were all hard wired. There was no chance of mixing up power cords and another questionable connection is eliminated.
So, when you are doing maintenance and cleaning connections on interconnects and speaker cables do you clean your IEC sockets too?
Most of the supplied power cords on the equipment I have owned were Belden cables. Belden is a large company and wire is their specialty. They have all of the sophisticated equipment you could possibly imagine for testing and evaluating wire and the materials it is made of. Compare this to some guy in his garage producing a power cord that he covered with a braided jacket and finished off with fancy connectors. What equipment do you think he has to ensure his cable is properly manufactured?

Gtfour45, Wow! I didn't realize you are in charge here and all the way from Australia.
What I do realize is that I am in fact entitled to my opinion too and I will post my opinion anytime I feel it is necessary.
It seems we have really hit a sore spot with you. Do you manufacture cables? Do you sell cables?
I am in my 60s and I have a life time of experience in high end audio. I have owned many many systems that would be considered the best in the world. I know the family sound of all of the best known high end brands.
I have recently noticed there are many newcomers to audio and I feel the need to give them straight answers.
On the other hand, you have no feedback here, so, I assume you don't buy anything and you don't sell anything on this site, therefore you are a noncontributor and you have no right to tell Schipo, vernneal, myself or anyone else that we are not allowed to voice our opinion about anything.
Have a nice day.

Rrog,

The examples you provide were amplifiers. Do you find the same phenomena with digital front ends? My experience has been that quality aftermarket cables really improved system performance across the board. Amplifier performance was changed by aftermarket cables, but involved more trade offs and was harder to find the right balance.

I am sympathetic to potential cable fatigue as they do act as "tone controls" and there are so many possible options and they can be so expensive that finding the ones that work best in your particular application can be quite draining.

With that said, this thread is focused on "Why power cable effect overall syste(m) sound?" Your post is sincere and well received. Other indignant but unsupported comments from non-believers are as annoying in this context as the noise we are all trying to suppress in our audio systems. Sort of like an atheist attending theology class and preventing the group from productive study of the history of religion. Analogy well chosen, annoyance with bomb throwers is sincere.

I suggest naysayers start an alternate thread about "Why power cable doesn't effect overall system sound." And they can have a civil and self-reinforcing discussion on all the reasons they feel that way, empirical, theoretical, political and spiritual. I promise I wont harass any of you. (Subtle change in punctuation at end of suggested thread title also carefully chosen.)