Are manufacturer AC cables good enough?

The hypothesis is (whatever the particular wire, tweak, etc); that a change (good or bad) can be heard.     If one desires to apply, "science", to an agenda, regarding their listening enjoyment; experimentation is an absolute requirement.     iow: One must actually TRY, whatever’s being discussed, with their own ears, in their own system.      The electrical/electronic variables, as well as biases and/or aural acuity, are too myriad to calculate.      As one notable Physicist, theorist and Nobel Laureate (popular, for his lectures on QED) is usually quoted, " It doesn’t matter how beautiful your theory is, it doesn’t matter how smart you are.    If it doesn’t agree with experiment, it’s wrong."       THAT’S, "logic".

Experimentation in science requires more rigour that almost all audiophiles ever subject themselves to. Every change can't and isn't "night and day", though so often that is exactly what is reported due to confirmation bias and nothing else. Absent knowing the change, audiophiles can rarely with any accuracy identify a cable change which blows that whole "night and day" claims out of the water. Meanwhile they are still "trusting their ears" while having no clue about their room response, nor dealing with the acoustic issues far worse than any cable.

 As one notable, Physicist, theorist and Nobel Laureate is usually quoted, " It doesn’t matter how beautiful your theory is, it doesn’t matter how smart you are. If it doesn’t agree with experiment, it’s wrong."      THAT’S, "logic".

Who is this notable Nobel Laureate? I doubt very seriously if his criteria for experiment is put a cable in a system sighted and proclaim the sonic superiority of the cable. Physicists, theorists and Nobel laureates use stringent criteria for experiment. 

Too lazy to copy/paste something, in your search bar?     Typical naysayer, to ignore something so simple!      If he ever owned a sound system, I have no doubt, he’d have EXPERIMENTED with it!       Your ilk is an embarrassment, to the scientific community, not to mention: a waste of keystrokes. https://www.brainyquote.com/quotes/richard_p_feynman_160383

@freedomgli and @rodman99999 : stop feeding the Troll. You will get nowhere. It will continue to be a circular argument going nowhere and you will accomplish nothing but empower him on his anti-audio hobby