What one change to your room, system, or setup made the biggest improvement?

I’m getting ready to get this to put in between the TV.
https://share.google/I6frx0PooJR7eHm25

I am also looking at getting a network switch. Figure the panel will do more good plus it’s $1000 cheaper Lol 😆. 

For sure, implementing a distributed bass array and getting professional to do it. 

GIK’s two 244 panels in the center of the front wall simply locked the sound, especially vocal. i moved from a secondary room to the current room and this treatment has worked like a charm. The soundstage simply locks and music sounds wonderful.