Just updated my virtual system

@baylinor , IMHE not enough absorption is used by many. People are use to the bright glare caused by higher frequency reflections. When you remove them the first impression you get is that the system sounds dull. Which at first disappoints until you listen more carefully to the image. The instruments, particularly cymbals are much better contained and have a more solid image in space. I think the problem for many of us is that we do not have enough late reflections because we are using smaller closed rooms.  Larger rooms that are open to the rest of the house usually sound better to me al least. If GIK over does it it is probably because they do not factor in the dispersion of the speaker as they can be hugely different and many do not require as much as they recommend. 

@erik_squires , Good work with the crossovers! I might make one suggestion. Stuff the drawers in your speaker stands where the crossovers are located with a folded bath towel nice and tight. Cavities resonate. Putting one right under the speaker could be a problem and make sure the drawers/crossovers do not rattle. Do the towel and let me know what you think. -Mike

@mijostyn  Those stands are inert.  The speakers are heavier than they look.  There's no drawer rattling. :)

The problem with the "diffusers" that are basically some cut out flat material placed on top of absorbers is they do a lot less diffusing than absorbing. They do look great but to properly diffuse you need to have diffusers that actually have multiple elements protruding out without any absorbers behind it. Just my opinion.

@erik_squires 

Of course you have many more windows than I do. I only have two 2' x 3' triple glass pane 4" thick so the sound of our rooms would be drastically different regardless of treatment. Maybe you will be fully satisfied as designed. That was my hope :)

They do look great but to properly diffuse you need to have diffusers that actually have multiple elements protruding out without any absorbers behind it. Just my opinion.

@baylinor 

Well, depends on what you mean by "proper".

The effectiveness of these is limited by the depth of the material.  I consider them to be high-value, for what they cost and where they fit, but I expect deeper, bigger, much more expensive panels if properly designed would provide even better performance.