Let's talk power cords

One of the many arguments about after market power cords is the "Last few feet" argument. Basically saying that since all that previous wire was just common ’whatever’ the ’Last Few Feet" cannot matter.
MY experiment was done by chance. But does show a path to prove (if only to oneself) that the (short) aftermarket powercord can and does make a big difference.

MY chance adventure came about after making some power cords with the same quad wire I had used for two sets of very long extension cords. (From kitchen wall, 20 amp single duplex on 20 amp breaker. I ran home made AC extensions via two sets of quad twist 12 gauge MilSpec silver plated Teflon 600V wire. wrapped up and a pair of grounds along, to cross over to the living room at 32 ft to power conditioners, and 40ft for amplifier, ending in sets of boxes with duplex in them.) So all the power to my stereo comes via these two sets of long wires.
When I made power cords to go to the equipment with the same wire, they were, as most folks think of silver plated copper, tilted to the treble. I made two PC, one 10ft long, with Furutech plugs, the other 6 ft long same sort of plugs. Even after a long break in, these PC were not great, leaning to the treble.
So I took the same plugs off that wire and used some DH Labs wire (the $8 a foot OFC 12/3 type. Right off better bass, way better bass and midrange.
And then I thought, the exact same wire I was using is still in the extensions. So WHY is that not making the later wire the same as it is on it’s own???

Anyway, I do not have the answer.
However it IS a project anyone could do. make a PC out of the same sort of wire in the wall Romex, whatever. See how it sounds? Then remake the PC with your own audiophile wire. And see if/how it changes.
If you too find your aftermarket wire way better than the direct to equipment sound of the in wall wire... Then you have personal proof of the "last Few Feet" matter.
One could also make up an extension cord with basic cheap PC cord, and a final cord and do the same experiment, with the extension cord and the same material in the final PC cord. and then with that same cheap extension and a good Aftermarket powercord.
Just something I had happen which offers a way to test for yourself the results of the last few feet of a high end PC on your own stereo

And then I thought, the exact same wire I was using is still in the extensions. So WHY is that not making the later wire the same as it is on it’s own???

Anyway, I do not have the answer.
However it IS a project anyone could do. make a PC out of the same sort of wire in the wall Romex, whatever. See how it sounds? Then remake the PC with your own audiophile wire. And see if/how it changes.

Romex is very high performance but is illegal and dangerous for use as a power cord. That is why all power cords are flexible wire. The other requirements for a good power cord were outlined on the first page of this thread.

There ARE solid core aftermarket power cords available commercially. I agree they can be dangerous "IF" flexed a lot.. and when they get old who knows how long before they may crack or break? However making up a temporary powercord with ANY material (even coathangers?) in the name of an experiment is certainly OK (in my book maybe to you the Nanny State should ALWAYS be in charge? IMO if you can read this,you are smart enough to not kill yourself.) I may try some coathangers..... just for the heck.

@ pawlowski6132, you asked for specifics, here goes. I've installed a PS Audio BHK Stereo 250 amp recently and have been working to get the tonal balance of the system fine tuned to my liking. I had few power cords to try, none terribly expensive; Mojo Audio copper ribbon, Wireworld Eclipse, DIY Furutech FP-S032N, & DH Labs Red Wave. All made subtle changes but all were slightly off, either too much sibilance on closely miked recordings accompanied by a bit of tonal dryness or a lack of liveliness if they didn't accentuate upper registers too much.

This illustrates what I wanted - I was recently listening to a live performance of a small Baroque ensemble and when the period Oboe was played with gusto, it blatted, squawked, and sounded harsh but yet it didn't make you recoil like a harsh recording can. When the soprano let lose with a fortissimo passage, that was also harsh but it didn't make you recoil like you might when listening to recording playback. 

When I installed one of PS Audio's AC12 power cords on the amp, the amp hit its stride and was much better balanced (within the limitations of the recording.) Bass and treble were in balance without exaggeration, and there was far less tendency for previously excessively sibilant recordings  to sound too harsh. Harsh musical elements sound harsh but without as much glare as was evident previously. 

Admittedly, the differences in power cords are fairly subtle and I can understand how some would consider the costs to be out of proportion to the benefit. 

Has anyone been able to explain why power cable would make a difference?  Or this thread is basically a pissing contest.