Best budget, high current, DIY power cord wire?

The last post is very interesting. Has anyone auditioned shielded and unshielded power cords on their power amp to see if there's an audible difference? Of course, this would only be valid if the only difference between cords is the shielding.

Question for the group. Mind I'm not trying to cause a ruckus but rather genuinely curious. First if it it thought that a better power cord improves things why not run a dedicated better line from the main panel in the house. ie if 5 feet of better improves things would 5o more feet improve things more?

Second my knowledge of solid state physics is way deeper than my audio understanding and or experience. Given that I'm completely at a loss why vibration isolation of a power cord should make any difference. Are there any studies out there?

Speaking to my own situation, running a dedicated line is impossible in as much as I rent rather than own.

But apart from my situation, I believe it's usually desirable to run a dedicated line...

I'd advise you not to get too hung up on asking for other people's heads up comparisons. Power cords are so system and component dependent that what's mana from heaven in one system is chaff to be thrown away in another. When one person says something completely opposite from someone else about a wire or component, it doesn't mean one's wrong and one's right. Usually, they are both right, but only in the context of their system. This subjectivity is really aggravating to one possessed of "right brained" analytical thinking, but that's the annoying reality of things. Unfortunately, you just have to buy and try a few things.