The time I spent learning about room acoustics has been the single greatest enhancement of ALL the changes through the years of listening.. It was also the least expensive..
Same here...
All the rest is gear conditioned mass ignorance and selling technique...Not because all gear are equal, they are not, but matter way less than acoustic...
But even acoustic seller sell ignorance or easy to made passive costly material...
An acoustic tuning and control is too complex to be sold at low cost...
We must do it ourselves..
But it is not very popular to say to people that 20,000 bucks system or 100,000 busks one that did not matter the way they think...
Audio system are like woman, most dont want to take the time to learn them, plug and play, plug off... This is audio for most...
And their brand name is proof enough for them that it is good...They think that they know how to hear but hearing must be learned like any acoustician or musician know already...
The truth is not popular and science either is not... propaganda and publicity are more easy to swallow...
You know all that already ...
My deepest respect to you...