I would also second Shadorne thoughts diffusion seems to work best in a very large room . Bass trap's are what most people need in normal size rooms only after you address this should you think about diffusion. I would also address the first reflection point with some absorption before adding diffusion unless the room is very large. I only use absorption in My 23 foot by 17 foot room a nice size room and My speakers have a rear tweeter . I have the speakers about 5 feet out from the wall and have a trap on the wall between the speakers along with every corner and first reflection points plus a couple of others. Marc
