Room treatment with acoustic panels

@fire_water Every improvement adds to the final result. When you think it can't get any better, it does. 

@cshenon You're welcome. They are pretty busy. The lead time for my panels was a little over a month to get them made. Your room model should be as accurate as the information you gave them though.  I used their suggested placement plus the mirror trick to start placing panels. 

@toddsyr   Congrats on making the jump into the acoustics pool, so to speak.  I'm sure your GIK additions have provided more musical details and engagement with your music.

I was where you are many years ago and hope you might be open minded to a few suggestions to take things further.

> acquire and learn OmniMic or REW measurement software so that you can tweak panel placement, angle, quantity etc.  GIK has done their best to guesstimate what you need but accurate measurements of early reflections, decay times, and frequency response will tell you what's going on in your room.

> in terms of using measurements to tweak things, I'd suggest starting with early reflections of 0 - 10ms using an Entergy Time Curve (ETC).  You'll want the early reflections to be down -15 to -18dB from the direct sound ideally.  Here L vs R symmetry is important if you can't reduce them down to -15 / -18dB because a stronger/louder reflection will pull the image to that side messing with your image stability.

> measure a T30 decay time in 1/3rd octave intervals to see what's happening, one channel at a time.  Your curve should be flat across mids/highs but be longer (about 150% longer) than your average mids, and ideally fall within a 200 - 450ms overall range.  Add panels to reduce decay times if too long but be careful not to over absorb >2kHz as it'll make the room dead sounding and less engaging.  Use diffusion and reflections for mids/highs and absorption for bass.

> use gentle EQ to correct L vs R frequency responses loudness differences as the last step, typically restricted to the bass region only.

I provide remote analytics services and am in the Toronto area if you're interested.

After a week of a few emails & phone messages, I finally received an email from John @ GIK yesterday. He asked me my room size (again) & to add photos. Now I'll see how long this takes.

@toddsyr I'm looking forward to getting my ceiling clouds.  TheQuietRoom.ca here in Ontario Canada where I live make these beautiful felt boxes in an array of colours. I was torn between simple white or dark brown but looking at my renderings the dark brown is visually more grounding. GIK displays a beautiful Walnut brown Quadratic diffuser I've considered for the front wall but it looks like it's no longer available in this color. I'd also like to know if my room could benefit from a bass trap tucked behind my couch.  For various architectural constraints I don't want to clutter my room with more treatments than this.  

To connect the dots so to speak as I saw the post from @kevinzoe, he produced the analysis and report that I provided a link to above. For clarity I have no affiliation or incentive, I am just a very satisfied client.

Whatever GIK comes back with will be pretty generic and in some cases a best guess based on previous set ups. John is a nice guy. Nothing against them whatsoever though - I use GIK products and will be buying more soon.