Hi bg 1968: The link you provided is not valid.
PI Audio Group Diffusors
Looking for thoughts on how these have worked in systems both sound improvements and placement. Also how they may have compared to other diffusion products. I am assuming they will not diffuse lower frequency like a wood QRD or Skyline diffuser. Thanks
http://piaudiogroup.com/site/mobile?url=http%3A%2F%2Fpiaudiogroup.com%2FSound_Diffusors.html#2878
http://piaudiogroup.com/site/mobile?url=http%3A%2F%2Fpiaudiogroup.com%2FSound_Diffusors.html#2878