Power cable education needed

Since there are so many aftermarket Power cables are selling well, the reasonable explanation is they do make a difference. The audiophiles are the ones pay more attention and enjoy high quality music reproduction. They can not be all crazy.

Do I think expensive power cords are better than the cheaper ones? Well it depends, it is like this as an example, and the number is not necessary accurate either. A $500 PC may improve SQ by 2% from the stocked one. A $5,000 PC may improve another 0.2%. Is it worth it? To some it does. But if you cannot hear the first 2%, considered you’re lucky! 

I'll second to that. I have a box of power cords acquired over the years. I am familiar with their sound signatures in my setup and in my listening room.

When my friends were in my house one time we were arguing the same things about the effect of PC. So I picked one different PC and ask my friend to either switch it with a component or don't. I stayed at another room. I was able to pick up correctly 100% after a few changes, so was my wife. 

But most of them still could not tell the difference. I learnt that blind test is tricky. Because I am familiar with the sound of my system in my room, and I am very familiar with the sound of my power cords, I could tell the sound change easily and they could not. 

if I am in a different environment and use cables that I am not familiar with, I probably will not be able to tell the difference either.  

My wife and my friends wives are listening to music too. So I do not understand why that is a tall tell?