The acoustic of very small room cannot be set as very big room... And great hall acoustic is very different...
I dont have money , then i decided to embark in a homemade set of experiments 7 days on 7 for more than a year because i am retired...
A dedicated acoustic room make it possible such set of experiments,,,
i learned to experiment with passive material treatment but also with what i called active mechanical controls with a grid of distributed Helmhotz resonators tuned by ears all along the room near the speakers and near to my listening position...
The end results was not perfect but so hugely different from average speakers in a living room , there is not even comparison...my 2 way box system gave me what a multichannels gave in some way...
It was not perfect because my speakers so good they were , were not top nor my other gear pieces...
But my experience was so stunning that it resemble being in the sweet spot on a great musical hall and hearing music around me ...
Because my gear was average it can be improved on many acoustic aspects, but learning how to control a room taught me how general acoustic recipe given as solutions can be useful but scratch only the surface of the acoustic puzzles and the acoustic power of transformation in a room...
Those who did not experiment it cannot have an idea...
If someone want to reach the top, he must create an acoustic room for his speakers , buy the best gear, and buy the BACCH filters....No need to multichannel...
Acoustic consist in helping the ears to create, not tricking the ears to go where human brain do not naturally go...The difference between these two roads is very, very small... Milliseconds...
It is only my limited experience teachings...
There is three main focus in my tuning experience of very small room ( 131/2 feet by 15 feet by 8 feet 1/2) : the main aspect is timbre experience, because you can have localization of sound in space with a not optimal timbre experience or a distorted one....Then in second localization of sound sources all around you....But the third last aspect ask for more work and it is immersiveness, the way the listener is included in the recording acoustic translation experience in his acoustic room reproducing the recording but including him with his listener position in the soundfield...
This is possible to some level with purely mechanical means... It is not perfect as i said but going back to normal room listening or even to a room only passively treated with usual acoustic recipe is impossible...But to reach perfection is impossible with homemade mechanical controls made by tuning ears ... If someone read about the BACCH filters i think the next acoustic tool to buy it is this one...
I learned a lot doing it...
I learn at least that it is less the gear but acoustic that is the basis of audio...
We are all different with budget differences and different spaces... Then no one can impose his road to others for sure...
I only advise people to read basic acoustic more than gear review...😊