The only non-science tweaks I genuinely use are these two guys:
View attachment 1308293
View attachment 1308294
The Inner Health Plus Guy on the left speaker and
The Walrus on the right speaker. Whatever speakers are out to be played with, they sit on top. It's a ritual now. I think they are blurring/absorbing wall reflections or something.
To me, speakers sound better when these dudes are sitting on them.
Soft toys are cheap, fun and whimsical and I swear they increase enjoyment especially with small bookshelf speakers (my current passion). Give it a try.