Now about acoustics...I don’t use a single thing. I treat the room by stuffing it with all sorts of different fabrics/upholstery/furnishings etc.... It sounds good to me, and I can care less if it does not to someone else.
Perfect for you as my room is perfect for me...
Congratulations..
But your feeling does not invalidate my experience with acoustics nor science itself...
Acoustics is the only way to put any system at any price at his working peak potential once we had control over mechanical &electrical problems...
Changing a piece of gear instead of making the system we already own work at his optimal level, before the necessary or unnecessary upgrading will not do much, or as well as we imagine...
No one can know if his room is optimal to serve his system acoustically BEFORE experimenting with all aspect of acoustics... our feeling that all is right has nothing to do with objective experience in changing conditions and changing acoustics parameters..
It is hard to do. We must study, We must have time for many experiments to learn (most of people work and dont have the luxury of time) We must have a room to do it(most people has no dedicated room ).
But the truth must be tell for the sake of it and for the benefit of all...It cost me nothing to do it, it is the good news...