Small Room... Big Stereo

Can you do a diagonal setup?

You are going to need DSP + Absorption panels badly. Get the 4" thick kind at least from GIK and maybe the art panels if you want to decorate as well.  Thick panels can go deeper and compensate for lack of more panels.

Because the room is so small you won’t be able to fit decent bass traps so you’ll need DSP to clip the massive bass peaks.

Don't forget the ceiling.  Treating it can reduce the echo/cavernous feeling by a great deal.

OK, I'll continue to update the community.  I think it will be obvious as i work through this.   I hope my Roon can do the DSP work.

Check out my systems page. My room is small but not square as yours. I'm  fan of working acoustics out passively.

Munich is the high end !,,,

i also think natural is better, iF you can do it first then if needed let DSP do it’s thing. You can typically get away from null / gain wave w careful chair placement…..of course that assumes listening from a spot…

i have a bigger room but have achieved an RT60 of .62 with careful placement and a LOT of natural material furnishings, including a cowskin rug…..

https://systems.audiogon.com/systems/7100#&gid=1&pid=8

What is your ceiling ht ?

have fun

which NAIM do you have, love mine..

Jim