Do powercords make a difference in sound?

Dear Mr. Liguy: I would like to think a lot of things about myself (and a few of them may even be true!), but in the situation I had something of particular relevance to tell you, I'd go ahead and spell it out...

I am truly sorry but I simply do not subscribe to your accessment. I mean no offense. I am sticking to my guns that properly designed power supplies do not require fancy power cords. I do not disrespect your opinion, I simply do not hold the same opinion. I have designed power supplies for a living and fully believe that I, during my career, have designed more than a few that can allieviate the effects that would cause detriment to audio reproduction.
I mean no ill will, we simply disagree.

Liguy - Have you done any in depth listening/comparison with some good aftermarket power cords or is your "opinion" purely theory based?

Liguy: "power supplies do not require fancy power cords" Your statement maybe true for equipment to function however it does not eliminate the possibility of after market cords providing change in sound good our bad. Is this not what the original question refers to?

Liguy, I certainly can conceive of a power supply that show no response to what power cord is used to connect to the wall outlet, but I have not heard one apparently. I do have a question, however. How did you choose a power cord to use on these supplies? I mean that sincerely also. Did you just choose something from Radio Shack or did you make a power cord and use the same one on all the supplies you made?

I can certain conceive of a power cord that would have poor capability to pass the needed current. Equally I cannot imagine the design principles that would guarantee the very best power cord. I have made shotgunned multi-strand power cords that were more than 2 inches thick and too cumbersome to use easily and which didn't sound any better than those half as thick. I have also heard very expensive power cords that were not exceptional. And I remember once when a Radio Shack pc which I owned so embarrassed the manufacturer of a very expensive silver power cord that they bought several and reverse engineered it to make their "improved" power cord.