Hi Bill, I worked with GIK Acoustics of Georgia. http://gikacoustics.com
Their lead engineer is a guy named John Dykstra.
They have a 3D room drawing tool and a questionnaire which forms the foundation of their analysis and recommendations. They want to know the configuration of the room like windows, doors, window treatments, flooring, listening purpose, equipment used, etc.
John nailed what was happening in my room and made 5 specific recommendations in rank order of impact and sonic expectations for each. The beauty of this approach is it allows a person to scale into a full treatment if budget is a challenge. For ~$250 progress is made as a first step.
In my case 4 of the the 5 treatments were installed. My current room is the worst room I’ve used in 30 years of hifi listening. Investing $1460 made this same room the best I’ve heard.
GIK prides themselves on cost effective proven with science treatments. Their absorber/diffusers were $244 a pair in a market were many charge $900 and much higher with use of crazy exotic materials of no added value.
I have measuring equipment, but a simple slap test can say a lot. In my case a single loud hand clap caused an ear piercing echo before treatment. After treatment the slap echo test was crisp, but not ear piercing. It proved the treatment only tamed the room while not reducing it to an anechoic chamber.
The bass traps on the ceiling probably shocked me most on the upside.
My wife has always been “tolerant” of the hifi and occasionally enjoying it. The room treatments were ordered with matching wall/ceiling colors to make them blend in as best as possible. She appreciate the aesthetic, but loved the sound improvement even more. She now listens to the hifi on her own and has fully embraced the whole set-up.
GIK is seriously back-logged, expect 16 weeks to delivery.