I started with GIK full range absorbers at my first reflection points and that helped tremendously. I then added quadratic diffusers to my rear wall and to my left and right. I temporarily have some diffusers in my mid wall corners for the bass until I get more absorbers. I also want absorbers for my front wall and front corners. My virtual system has pictures of the room.
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?