My advice before you spend some money is to temporarily hang a heavy towel, or a rug in that spot to see if it makes a wholesale improvement. If it does, then some nice absorbent treatment there should do the job. I wouldn't recommend diffusion in a spot like that, so close to your listening position. I prefer to be at least 6' or so from any diffusion product.
Back wall treatment?
I have a small room which I’ve treated with bass trap in the corners and absoprtion panels at 1st reflection points on the front wall, side walls and ceiling. I am quite happy with the results. I am considering what to do with my back wall. Due to the size of the room I have to sit with my back essentially right up against this back wall. The wall only goes up to about ear level, above that its open to my family room and kitchen.
So my question is what do you suggest for this short back wall? Broadband absorption with something like the GIK 244 panel or diffusion or nothing at all?
So my question is what do you suggest for this short back wall? Broadband absorption with something like the GIK 244 panel or diffusion or nothing at all?