Question: Sound Treatment behind the Listener?

I have treated the 1st and 2nd reflection points and I have sound panels between my speakers. I also have tube traps in all 4 corners, but I am not sure what (if any) should be done with the wall behind the listener.

That wall presently has a DIY rack system that holds about 5000-6000 cd’s. I believe it helps scatter the sound. But I’m not sure if that is the right approach.

So, what are you guys using on that wall? Diffusion, Absorbtion, Reflection? Anything else?

I would appreciate your thoughts.



Also, the ceiling in the room has acoustic tiling glued and stapled over the drywall and there is 6" insulation in the jousts. There is no slap echo at the back of the room.

I was ok with the sound with the Cd’s/rack combo, just thinking of removing it now that I don’t play the CD’s.

I have already in the room Stillpoint Aperture 2’s at the 1st and 2nd and center points, perhaps adding a couple more of these in the back? I also will check out the GIK and see what suggestions that adds.




I put up 3 square 242 Acoustic Panels With Scatter Plate (+$30)
Pure White Fabric (standard) to better blend into the white wall.

They are about 18" above and behind my head evenly spread out with about 2" in between them.


Perfect, thanks. I'm thinking about moving my 242s to the rear wall but they don't have scatter plates - maybe I can buy those sep and then pull the staples out of the fabric and put those in and restaple. I'd probably make a big mess of things though.

That youtube vid posted earlier is excellent. I'm thinking about ordering  2D / GIK polys to put next to (new and larger) GIK 242 panels on my side walls. 

I just need to take a smidge of treble energy out of the room - not much but some - well quite a bit for some recordings but none to very little on others. Resisting buying an EQ.

Well, I submitted the form to GIK. Before being able to submit the form, I must say the constant need for showing that I am not a robot is annoying. Especially so for the GIK website. Why is that necessary?