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Looks like acoustically a nice space. What exactly is/are your compliant(s)? My experience with shows is that nearly all rooms have crappy setups, so I normally come home a proud papa. Have you run a frequency sweep? Have you tried DSP/EQ? How far back do you listen?
See the third post here by Floyd Toole: http://www.avsforum.com/forum/113-subwoofers-bass-transducers/2945266-bass-trap-reflective-surface-behind-subwoofer.htmlIf you're interested in upgrading your bass absorption technology, you might consider tuned/diaphragmatic bass absorption or VPRs like RPG's Modex Plate for passive, otherwise bass arrays (like DBA or double bass array) or PSI AVAA C20 for active options.
There are very, very few of us with the ability to determine the room dimensions we listen in. I learn much more from reading the solutions arrived at taming less than ideal rooms.
Sadly room acoustics/treatments/DSP-EQ are poorly understood and the effects under appreciated. While treatments/DSP-EQ can help, they aren't cure alls. So most in-room audiophiles way over-buy gear for the given poor performing room. And nobody wants to hear that (pun intended). Honestly I'd rather have a well sized/shaped room with a $2000 system than a poor room with a $100,000 system.
I went a bit mad with room treatments last year (I had used some before), now employing a total of twenty-one bass traps (GIK Soffit traps) in all the corners except the floor wall ones, that in a 14' x 13' x 8' room. I took measurements as I added these bass traps using REW (I can post them if anyone's interested). I also noticed that there was a major improvement in decay times, down to between 120 to 180ms. That's probably too low for some but the result is really nice percussion, piano and plucked guitar for example. The decay times are something DSP/EQ cannot really change as I understand it and would guess these new active speakers can't do either?
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