Should someone be looking for modern acoustic treatment devices, made of polymer (not using any kind of wool whatsoever), just check this one out. It is the result of cutting edge tech developed by an engineer with PhD in acoustics.
They look awesome (they can print any picture you want) and work wonders.
They do sell internationally. It is worth giving them a look.
http://www.audiodifusores.com/
A picture of my room, with them installed.
If you must lay on the floor when listening, you’ll get better results moving the mats back and centering them between the speakers 
That looks great!
Graphs are really where it’s at here. I’ll dig mine up soon and post. Before and after if possible, for obvious reasons. Be especially careful with absorption. Diffusion is friendlier.
The best sort, beautiful BTW!
I wish they had a site in English. The products look very interesting.
Signed,
Ignorant American who barely speaks English
Just drop Tomás (lead engineer) a message. He will take care of you.
He is very nice and knowledgeable (attended UCLA and such).
What are the dangling electronics on your devices? Very curious.
My 20’3"x14’x11’ dedicated room and room treatment compliment as of March 2021.
I think I noted sometime before that I love your room/system and appreciate your attention to detail.
Just looking at the pictures, my thought is that you may have over done it with the absorption on the side walls – but I assume you took great care to listen along the way so as to optimize everything.
Much more recently I replaced that last pair of DIY Tube Traps along the sidewalls with identically sized stacks of ASC’s current 13" Isothermal Tube Traps. Also after a long trial period, I replaced my front 4’x2’x5" broadband absorbers with customized 4’x2’x8" RPG BAD Arc hybrid diffuser/absorber panels.
Finally I added a pair of smaller customized 2’x2’x8" RPG BAD Arc hybrid diffuser/absorber panels on the rear wall.
I actually just completed the modifications to the RPG bad panels yesterday. They will be upholstered in GoM acoustic fabric to match the other treatments in the room and the rears will be permanently mounted on french cleats like all the rest of my wall mounted panels.
When you have five bed loudspeakers, you have 5 primary reflection points along each sidewall to address @scotte1. Computer modeled ray tracing and a multitude of REW measurements with the invaluable assistance of Jim Farrell (a local acoustics guy and REW expert), along with lots of critical listening, confirmed that this was the correct choice.
Its also always worth repeating the fact that truly broadband absorptive treatments manifesting an absorption coefficient of 1.0 or higher from 200Hz-10kHz, do not tilt your room’s spectral balance. So my sidewall panels with 4" of 3lb/cu ft rigid fiberglass and a 1" air gap do not “deaden” my room sound. This complaint always comes up when folks treat their rooms with cheap acoustic foam, too shallow 1-2" deep fiberglass, or blankets/tapestries/drapes- all of which only efficiently absorb high frequencies.
10-4.
Again, great work all around.
Does anyone recommend anything (non-DIY) that beats or equals GIK at comparable (±20%, say) cost?
I haven’t gotten into room treatments but want to, but the little I’ve gathered over the last couple years is that GIK is the value leader. Better performance surely available, but at higher costs.
GIK offers excellent performance for the price as the core design of their product is based upon real science and independent test lab data rather than wishful thinking and pseudo-scientific bafflegab. However as others have noted with GIK, the fit and finish reflects their economical pricing. If you want something sleeker looking you’ll need to spend considerably more with their competitors like Real Traps, ASC, or RPG for example- or back to DIY, assuming you have some competence in that regard.
Thanks
