This is a great Video to show many things for acoustics
1. a strategy to a room acoutic approach from scratch
2. just how comprehensive it needs to be to make an actual signficant difference - even then miles from perfect, but miles better
3. how it clearly doesnt deaden the room even though there is a ton of treatment in the room
4. it looks cool (dedicated room)
5. you can hear the difference in treated vs untreated clear as day
EDIT - whats really funny is listening to the demos now I can hear this system is in desperate need of some dirac treatment
I couldnt tell that before, been a while since I listened