Those, or any other power cables similar, are a huge ripoff! Electricity is electricity, you cannot alter the sound with a power cord unless that power cord is a very small gauge and it cannot handle a high current amp, which in that case the reason the sound will start to go bad will be due to the amplifier overheating which should then kick the overheating protection circuit built into the amp, however, the amplifier builder already designed the power cord to handle the amperage of the amp, therefore going beyond that will gain nothing, unless you have a very long way to run the cord, then if you research how much amps you're running and how far you're going you'll get the correct gauge of power cord to use to prevent the amp from overheating.
Now I know you all have been hypnotized into believing that if you spend $10,000, or even $1,000 for a power cord you're going to hear amazing things never heard before; well first of all as mentioned above you are not hearing a darn thing; second of all, most of you people here buying that sort of uber expensive cords are older, have become wealthy over time, have money to throw around, but if you could have heard something you have long past the age where the average ear would have detected something very slight once you got over the age of 21, even if you were a freak of nature and born with super hearing, as you have gotten older your ears have slowly gotten worse, so now it becomes all in your head. The other odd thing is that all humans lose their high-frequency hearing, this is the part of the hearing that if anything could improve a stereo system sound it would be that, the lower you go in frequency the fewer cables have anything to do with improving the sound.
I can see tomatoes being lobbed my way, so as I go please read this:
https://makelifeclick.com/do-audiophile-power-cables-make-a-difference/#:~:text=Is the audio better or,this is simply not true.
On this site, if you don't want to read the whole thing, look for the color graph it will show vividly the amount and frequency of the loss of hearing that happens as we age:
https://www.thelancet.com/journals/lanwpc/article/PIIS2666-6065(21)00040-7/fulltext
I'm not going to bother to respond to you all debunking this stuff, I do not want to get into a war, you have your religion about this stuff and if you all want to believe in a cult there is nothing I can do or say that will change your mind, so I won't be responding.