What difference do power cables make?

Why don't you get a few power cords from the cable company's lending library, it's a cheap way to try a few expensive cords and some lower cost ones and find out for yourself if there is a difference.

I agree 100% with Mr. @hilde45 and he is being quite humble here. Dedicated lines are the way to go. Get all the noise off the line feeding your listening space. When I built my house 25 years ago I did this. No need for conditioners and I only use distribution. 

@hilde45 : definitely try room treatments. My room is fully treated with GIK absorption and diffusion (including ceiling).

As for the dedicated power lines, I think to me they are a bit overrated. At least for me, and the power situation in my house. I did it twice, both times professionally. The second time I went all in with in-wall Audience Hidden Treasure cabling, cryo-treated dedicated distributor panel and separate grounding. I could barely hear any difference before and after. I do use a good power conditioner, the Shunyata Everest (along with Omega XC power cord).

Pangea power cords are adequate, but I don’t think they improve upon basic, sufficient gauge stock power cords. True story, I tried Pangea years ago on my headphones amp, and it made zero difference. That prevented me to try any power cords for about three years. Until I did.

If you are open minded, I recommend you try these two reasonably priced power cords, the first for high power amp, the second for source:

A good alternative, affordable, is anything from Pete G. at Triode Wire Labs:https://triodewirelabs.com/product-category/power-cords/

I cut the power cord off of a Huge old deep freezer.

It was around 6 gauge. Ordered some good looking 

Nice quality plugs from China...... I could hear it quickly. 

To be fair, the improvement was subtle, yet noticeable if

You had a ear that was accustomed to your system. 

A welcome improvement 

@thyname Thanks for your history with Pangea. I will definitely circle back to power cords again, and I appreciate your recommendations. Saving for future use.