Talk to pros. Call or e-mail GIK Acoustics. They have a section where you can upload pictures and ask for professional advice. No one I know has better products and advice for less.
How do you know what room treatments to use?
I am thinking improving my system with room treatment. My system sounds “loud” (distorted?) when turned up. It is a high resolution, very good $100K system built over several decades. I am getting a new preamp that will improve things but think that the room is significantly to blame. How can I actually tell what is amiss and what is needed?