Question: Sound Treatment behind the Listener?

Got a reply from GIK. I need more info.

"OK, yeah that's a fair amount of space to work with. It will really come down to tolerance of thick panels and of course budget. If you can fill the entire wall with sound blocks that will work very well but that's a bit of a space commitment. 

If not getting Alpha 6As for that wall will help quite a bit still, and take up less space. 

We can also mix things up a bit, using Range Limited bass traps low near the floor and high near the ceiling, with the Diffusors (Alphas or others) in the middle at ear level."

ozzy

@ozzy  makes sense I think. You have a decent size room so they’re recommending abfusors.
FWIW, for my room, which is smaller, Mike recommended absorbers on the sides for early reflections and tri traps with range limiter in corners behind speakers. 

Thanks,

I'm not sure how many of the Alpha 6a's would need to be acquired. 3 of them with shipping is $763.

ozzy

I use Rockwool @ 35Kg per M3 floor to ceiling in height as a Absorption Room Corner conditioners. Directly behind and spanning between the Speakers I use a Diffusion Panel.

Each Side Wall has a diffusion pane.

The Rear Wall has a Aborption and Diffusion Panel set at a height of the listeners ears.

The sound is managed in a manner that has improved attraction with these measures in place.

Would it be identified as a accurate treatment using tools the can measure room modes is an unknown for me. 

Thanks Vinyl Shadow for the info.

I'm getting some advice from GIK but also just started a dialogue with Jeff at HD Acoustics who I found when searching here. It won't be free but it will (should?) be unbiased and sounds like he knows what he is talking about....because I don't w/ acoustic treatment on the rear wall.