Can a better power cable make a difference if NOT plugged directly into an outlet?

@lalitk You must be a dream customer for a saleman.

To explain my comment, the pangea has everything I look for in a power cable, but it can usually be found for less.   

You want to expain what features you look for in a power cord that are so obviously superior?

All good purity cables, if properly insulated and wound, will enhance the sound quality no matter where you are in the chain.  They help to properly align and pace the electrons passing through.  At least I think that's what Henry Kloss said.

Gentlemen I have built some not so expensive pc's using Furutech's totl diy brand cable and plugs, and I have three Analysis plus oval's installed also, replaced one of those cords plugs with ncf furutech's. I made so many system changes at once that it would've been impossible to tell much of a difference. The Furutechs rhodium turned out to be bright at first, several years later they've mellowed. 

My plan is to work backwards and replace these using the cheap freebie power cords starting somewhere idk where yet, to really see if I can hear much of a difference. And I'll be honest with myself if I lose detail. You think this is a viable approach? I tried to put my system on here but couldn't figure out how, without that it's hard for people to comment! 
 

Also I plan on building he helix cords and compare them  

What do you think your eighth grade science teacher would tell you?

I would have to say yes it might. As @erik_squires mentioned, a serious well shielded cord can make a difference wherever. At least it had for me. Tried one on my amp directly into the wall to replace the standard cord ( into a decent Hubble 20amp receptacle) and really brought things to life. Then into a Chang Lightspeed. Same benefit and increase in everything, but darker background. I no longer desire plugging anything directly into the receptacle. That particular Pangea seems very well built already? I tried this cheapie but goodie to very good effect:

https://a.co/d/hoNYALk

Like it even better than a Wireworld Stratus I was using prior. Gauge/shielding? Hard to say why exactly. Still (and forever) experimenting.