@hilde45 People who say it’s all snake oil raise two questions for me:
1. Do you think that these cords and conditioners have just been fooling everyone for decades? And they are too stupid to realize it and too deluded to know that they are not hearing a difference? If your answer is "yes" then you have a very low opinion of thousands of audiophiles.
My answer is yes to your first question, but your own conclusion is incorrect. It doesn’t require a detailed knowledge of logical and/or formal fallacies to understand why that may be so.
I think that using the word stupid isn’t very nice, by the way, but using careless reasoning is disingenuous . Anyway, cords and conditioners, being inanimate, can’t fool anyone. People can, and do.