How may a simple "Power Cable" change, improve an audio system?


How? How can just a power cable change improve the sound of ANYTHING? 
  Damned if I know. I have my own theories. But as of right now they are very simply just that, "Theories".
And I am a skeptic on this, "At least to a point". 
  Yes, I believe that;
A new, shiny power cable, simply designed to spec. "According to the NEC". And with basic shielding, twist and good terminations along with appropriate insulation "should" in my mind sound better than the ratty old power cable that came with "whatever component". But that's not always the case in my experience. Sometimes the new power cable seems to make no difference at all. And beyond that? I simply know that it "can" be an improvement.
  I do understand that many here believe that anything to do with, "High-end Power Cabling" is just, "Snake Oil" for sale. I used to think the same. But things like this that I am about to report to you just keep happening to me....
  Last Saturday at 7:00pm I was at the "Capital Audiofest" in Washington D.C. And that evening there had been arranged a bit of music "Live", for those of us that were still there at 9:00pm (I "think", it had been a long day)..  I happened to walk in early as the band was just doodling around after just setting up for the gig. They sounded really good and I decided to just hang-out until they played. as the band was going through the set-up and about fifteen of us on-lookers were just talking amongst ourselves between practice songs. A fellow whom I do not know stuck his "head" in the room and yelled someone's name. The bands leader stopped and looked around. The "Head", said; "Plug your amp in with this and it will sound better"! The "Head", then disappeared as quickly at it had appeared, never to be seen again!, "By me at least".
 There were a few scoff's that I heard. A few chuckles about a power cable, "Making an amp sound better"!?
  Then the band leader shrugged his shoulders. He laughed a bit too as he remarked and joked, "Well ok then, A power cable that will make my amp sound better huh"!? He then bent and swapped out the old cable for the "New" one.
     The band leader then played what sounded like the beginning of a song for about 5 seconds. He stopped, "With a bewildered look on his face and looked around as if confused" and then began playing again. After another ten seconds or so he stopped playing again. He looked around the room "Again", with a questioning look on his face. In fact I noticed several people with odd looks. A  couple of them looked simply, "Dumbstruck". A few others had smiles. But honestly? The bandmates looked mainly confused! Then everyone seemed to chime in at once. "Sounds great!", "Sounds better", I heard among other comments but all seemed positive. 
And I have to admit, there was a difference. To me? Not a small or slight difference. A absolutely HUGE difference! Both more open and dynamic it had sounded. Larger and more alive, with more detail too! 
And I have to say, as I "was" sitting right there in the second row about twenty feet from his amp. NOTHING had been changed except for the cable, A two second cable change on the rear of the amp. That was all!
    The band seemed to be having difficulty with this. For about five seconds! Then someone tried to basically tell them that "Yes, The power cable can indeed make you sound better". 
Just as the, "Head", had said!
And the band played on!
 Has anyone else had a similar experience?
Even I was very surprised that the small, "Maybe a 10 watt amp with a ten inch driver". Could have such a major improvement with JUST a power cable change. I never did find out what the power cable make or model was but I will. I talked to the band leader dude and offered to send him a IEC inlet of good quality as he promised me he would swap that out on his amp and let me know of any differences there "If any".
            Thanks in advance for all whom respond!
128x128jollygreenaudiophile2
@williewonka So you think silver-plating over copper, pure silver is good and pure copper too. Well that is good. Now I ask you as I ask you before why your favorite KLEI use Neutrik XLRs for new cable and these are brass based with nickel. You say before these are good and specially designed for KLEI - what is truth?
There are electrical explanations why power cords work.  

https://shunyata.com/2016/06/27/power-cord-misconceptions/
https://www.audioquest.com/resource/1138/Power-Demystified-whitepaper-8-23-18.pdf
https://www.lifelike.at/wp-content/uploads/2018/11/HMS-Das-Phaenome-der-letzten-15m.pdf

Caelin Gabriel, Garth Powell and  Hans M. Strassner are veterans in the industry and very knowledgeable. It's better to learn from them instead of some naysayers from an audio forum who's only contribution is to say "why oh why... that's the question" to look like an philosophical audio guru. I want to keep learning from a lot of people. We still don't know everything. Every company has some (biased) information and a lot is trial and error to find out what works in your system. But I think these people are on the right track to explain why. 
@ypingping - re:...

I ask you before why your favorite KLEI use Neutrik XLRs for new cable and these are brass based with nickel

To start with - they are NOT my favourite XLR’s
- since I have no components with XLR I have not had time to fully research them, but...
- I am aware of some great silver plated copper XLR connectors
- here’s one
https://www.takefiveaudio.com/products/602-xhadow-male-xlr-deep-cryo-treated/

FOR THE RECORD: as stated in responses to your previous "mis-informed posts" - I CAN confirm that the Neutrik XLR plugs made specifically for KLE Innovations are not simply brass base with nickel plating.
- But I have been asked not to divulge the materials - so it remains "a mystery" until such a time when KLE Innovations decides to disclose it.

So as usual - your are misinformed OR you simply like to "get your jollies" by continueing to spread FUD - i.e. Fear Uncertainty and Doubt, about KLE Innovations products as you have done in the past.

Signing off - Steve


Please excuse my absence from this thread. I kind of thought a bit of time to let it, "Percolate", (If you will), -would be nice. Of course this lets my own thoughts rattle around the in, Ye 'ole noggin, as well.. 
  By the way, 
These "Silver Net" connectors for XLR, in particular are my current favorite XLR connector. I fell in love with them a few years ago.
 https://www.aliexpress.com/item/32986949864.html
 I experimented a bit using these for speaker cabling actually. From an active crossover network to amp. Then to speaker. This in a few speaker "System", designs. And with excellent results. The problem with XLR is always the "Means of termination". I am sick of "Solder" regardless of the materials used. It is always a substandard termination and always tests-out as such.
  
Steve-"Willie"- Abrupt transients in a waveform.  "And I almost, Plagiarized,a bit here", But this is a part from a "DSP.com" paper with an edit by myself.
     A reliable transient detector is needed. This can raise deep questions regarding what a transient really is; for example, not everyone will notice every transient as a transient, and so perceptual modeling gets involved. 
 "Both intellectually defined after physically experiencing it. AND by utilizing instrumentation to seek, find and analyze as well. But when using mechanical means only? Missing a transient, e.g., in a ride-cymbal analysis, can create highly audible artifacts and you "may", miss the point entirely. But it's hard to adapt to using both ways with the transients at once. 
   I add this because this seems to be one of the "Holy Grail" for cabling to define first and then to fully address as "Part" of a cabling solution.
 The,  "Abrupt Transient Detector", I need one. But not just coding.
    Any Idea's?