Square room Soundstage??

Apart from DIY, atsacoutics has the cheapest panels and corner traps that I've seen.

Try near field listening as much is as possible in a room that size. Also smaller monitor speakers.

Contact SpatialAudio.Com re Black Hole bass node attenuator, A subwoofer type unit with mic attached that puts extra bass energy into the room to counteract nodes. $1000, has made a significant imprvt in my system. Email them.

Can you describe your setup; how far the speakers are apart from each other, from you, from the walls and where your listening position is?

I have tired alot of diffrent speaker placements. I seem to get the best results from near field listening and maybe 7 feet in between speakers. With the speakers far away from side or back walls

My speakers are rear ported. Is there any information the can be gained due to the fact that near listening has produced the best results? When I am put the speakers up close some intruments sound like there right over my head other still come right from the speaker.

Thanks