Diffusion vs. Sound Absorption views


I have Spatial Audio M4 Triode Master open baffle speaker in my listening room.  I have sound treatment behind the top of the speakers with sound absorption panels hung on the wall and an Aurelex foam panel down to the floor. 

It was recently brought to my attention that sound diffusion panels behind the speakers might yield an improvement in SQ over the sound absorption panels.  The advice I got is that OB speakers benefit more from rear wall sound treatment with diffusion rather than absorption.  I put the issue to you learned folks for advice.  Thanks. 
whitestix

Showing 3 responses by ptss

On a basic level - high frequencies add sparkle and life to music even to those listeners with diminished high frequency hearing. With that in mind I suggest diffusion should be your first priority and when you feel you’ve done a decent job of it then limited absorption behind the speakers as you find provide enhanced detail and depth to your sound. What types of music do you listen to most?
Essentially 
Diffusion everywhere, particularly front and back walls and ceiling in your case. 
Absorption only where benefits are obvious through experimentation 
@whitestix. 
The drywall you used does not “damp” the room.   In fact by reducing spurious noise from thinner, flexing drywall it provides much enhanced clarity. IMHO virtually every listening room would benefit significantly from your approach. It also significantly enhances accurate bass response :)