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.



@ozzy why not reach out to GIK Acoustics

I’m working with Mike Major to finalize everything I need for my room and I find Mike to be very knowledgeable. Provide your room dimensions and photos and see what they say. 

I did reach out to Mike at GIK. Sent him pics of my listening room. 

He suggested, and I bought, 3 acoustic panels to go on the wall up and behind my listening position. Which was on a couch with a wall right behind it. 

Timely thread as I'm looking into this as well - absorbsion and/or deflection on the rear wall. @vinylshadow  , which GIK panels did you put up? Thanks.

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.