There are certain spaces in a room where sound bounces and causes harsher frequencies than in other spaces. This differs according to the size and layout of the room. You’d need to do a bit of A/B testing to see where the sound panel would be most effective. You could also seek advice from a professional. I have a friend who did this for me. I sent him the specs of my room with pictures, and he advised me on where to hang my panels. One space that will be a constant is each corner of the room. That is where you can hang bass traps.