Let's talk power cords

@pawlowski6132 I understand your desire to gain info about cable characteristics from others. It’s kinda circular, as that information relies on gaging and aligning the contributors’ subjective listening (and hearing) impressions with your own. And I hazard to suggest this quest is further complicated (and frustrated?) by objective differences in audio systems and room acoustics.

So these people that claim power cords make no difference because of scientific therories. Well science only knows a small part of what there is to know. They can't explain ball lightening!!!!! That's Just in the electricity realm. If it can't be explained it doesn't mean it doesn't exist. Romex is solid core house wiring. Doesn't it  make sense to have a solid core power cord(after market multi strand) to finish the connection? I've heard the same positive effects of after market power cords that others have heard. How about metal whiskering? Scientist don't understand the mechanics of it and it has caused equipment failures. When metal is stressed, projections have been observed. Could that be the reason why sometimes when you bend or stress a cable it sounds different!! Cryonics is another where scientists don't know the full reason why electron emission increases in the absence of light. I got these off Wikipedia unsolved problems in physics. There is around 50 listed. 

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.