To all of you engineers out there-and others...


I'm considering on building a couple of  sound diffusers without any back.  It will be based on a quadratic diffuser, QRD-11, with different depth wells and all-just no back.  I have some bass absorber panels on my rear wall and I was thinking of hanging them in front of the bass panels.  They will have a full enclosed frame-just no back.  I think I may have gone too far, as far as bass absorption.  Please give me your

Handymann
handymann
Randy-11: The diffuser will have a main frame, different depth wells attached to the top and bottom of the frame, as well as the sides, but no main back. It will be open in the back. 
can you explain how they have no back?
and what they are constructed from

you might want to run REW and see about the bass, etc.