bro.
listening area around 20 sq. mtrs. height is about 3 mtrs.
problem: comment of one auditioner before was the echoing.
adjustments made:
1) vertical banners using thick center table top, two at the back and three at the front.
2) carpet at the center of the listening area.
I do not have bass absorber and sound traps, not into it yet. it collects dusts, requires detailed cleaning and occupies space.
vertical banners requires a few dusting only while the carpet requires some vacuuming, it's also a space saver since you just have to hang it on the wall and the aesthetics of the banners (these are hard to find weaves by our tribes from Zambo).
you have first hand experience on the result of the adjustments.