Before you spend a penny on new equipment or room treatments get this:
https://www.musicdirect.com/accessories/IsoTek---Ultimate-System-Set-Up-Disc-CD
No affiliation.
I was really surprised what a difference repositioning my speakers made ad the unconventional position that sounds best. I would never have them set this way if I didn't hear the difference using this CD. But it may be mostly because I have a very asymmetrical room. Still the difference is at least on the order of a speaker upgrade or more for me.
https://www.musicdirect.com/accessories/IsoTek---Ultimate-System-Set-Up-Disc-CD
No affiliation.
I was really surprised what a difference repositioning my speakers made ad the unconventional position that sounds best. I would never have them set this way if I didn't hear the difference using this CD. But it may be mostly because I have a very asymmetrical room. Still the difference is at least on the order of a speaker upgrade or more for me.