I agree with Geoff.
In thread about our acoustical principle you can find a post http://recforums.prosoundweb.com/index.php/t/33208/11544/#ms
g_num_9 with flush mounted speakers, but with front "baffle" built with air transparent
diffusers. Behind it are low end bass trap built with general Hidley/Newell principle (hanged panels) used in non-environment rooms.
Baffle built with air transparent diffusers "smear" diffraction from loudspeaker edges, but don't amplify low end that much, like infinite battle, and in this case you probably don't need to change loudspeaker crossover (a much
), also they don't stop air circulation needed for proper low end absorption in room
More about air transparent diffusers and bass traps behind it you can find in our publications page at http://www.myroom-acoustics.com/index.php?option=com_content
Hope this helps.