So me and my Dad first started off with that room calculator, but I didn't see a setting for rooms that weren't a rectangular prism, so I only really got the rough settings. 10.5x11.5x8 ft.
We started off playing all the tones, moving traps around. Nothing even remotely felt different.
So then we decided to play a few songs that were bass heavy, but in different keys. We ended up on the second half of Massage Situation - Flying Lotus. I sat in the listening position and closed my eyes while dad moved the trap around. The only time I obviously noticed anything was when he would have a trap right by my ear.
So then we set up a mic. A Sennheiser MK4. Put it in the listening position and we recorded about 5 minutes of moving the bass traps around. A few times we had to step in front of the speakers, but we remember which times those were. Other than that, we really didn't notice a difference. I did notice, however, the room sounds pretty damn live. Maybe I do need to build these fiberglass panels since Ethan's reflect higher frequencies.
What we did was pretty extensive. Corners, ceiling slots, behind the mic, over the speakers. No real difference was heard. The mic never moved and we never changed any gain settings.