I guess I was about 10 years old when I opened up the back of my speaker cabinet and discovered a power cord and plug taped inside the speaker cabinet. I had recently begun reading various audiophile magazines in the library. They were way above my head, but I enjoyed looking at the photographs...
To be perfectly honest, when experiencing audiophile nerviosa outbreaks of uninterrupted fiddling with the dang stereo , I swear out, “Why does everything make a difference?!”
“This listening performance was made in front of a live audience!” Lol! Everything matters, if by that you mean, can it be detected? I’m sure everything you mentioned can be detected by a machine calibrated to measure it. Listening subjectively and then trying to define (and often defend) it...