I thought I would put up some of my REW graphs for others to see and comment. My room is an l shaped room with a lot of glass and I’ve added treatment over the course of the last 2 years culminating in the photos below. I did take an initial reading before treatment (although in retrospect I should have set it louder). It at least shows how the treatment has altered the measurements, mainly improving the low end resolution. I also took measurements with the curtains closed and this noticably smoothes the results especially around 200hz - I suspect this is the glass windows vibrating. Note particularly the clarity overlay in the lower frequencies - this is where the really big differences were made. As you can see from the photos bass trapping was the main thrust of the improvements, bought on by switching from Isobariks to the 707’s and realising the bass needed taming. The bass traps on the rear wall are actually 10” (250mm) deep rather than the standard 6”. This audibly made a large difference.
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