Great speaker/sub combo @mscetal! As you are new here, you probably don't know that I have for years been recommending the GR Research/Rythmik Audio OB/Dipole Sub for use with planar loudspeakers. I made the double-woofer version, in W-frames rather than H.
Planar Speakers and Diffusors
I have the Clarisys Speakers. They are the Planar type. I would like to treat the wall behind the speakers. I have been told not use any type of sound absorber, so I am interested in the GIK Acoustics Q7d Diffusor
I have a large 85" TV in between the speakers, so the only area that can be treated is behind the Planers. Check out my systems page.
I have yet to find a review of these diffusors, so has anyone used these and can comment on the effectiveness?
ozzy