I discovered recently that if you say “gullible” slowly enough, it sounds like “cable”.
Perhaps if Jason 71 had put it this way; “It’s possible but, if there is a difference it will be many orders of magnitude smaller than spending an equivalent amount of money on upgrading your speakers” people might not be so rude to him.
There is a genuine role amongst the “audiophile” community for scepticism. Otherwise we are all vulnerable to snake oil pedlars.
The only way to know the answer to this question would be to do a double crossover randomised control trial and apply a statistical process to determine whether the results are likely to be due to chance, or not.
I’ve been into audio since 1969. The acuity of my hearing is not what it was. But the credo I used in choosing components back when my hearing was very good, was never to pay more for something that I couldn’t immediately appreciate as an improvement. I never regretted a single purchase based on this approach.
My hearing is deteriorating, but my appreciation of music and the pleasure it brings is still increasing. This is likely to happen to all of you, too, as the decades advance.
In the meantime, I hope you all can appreciate the music.