I agree, I had no echo either. I found tall silk plants/trees and some open shelving for my vinyl placed at first reflection points to bring everything into place. I have open timber running across the ceiling which is great for helping with diffusion and de fraction.
My room has "zero" slap echo. Do I need room treatments?
So I have floor standers and 2 subs. The room is shaped like a "T" with none of the walls the same length and most walls are 8" by 8" logs. The distance for rear wall reflections from left and right speakers and subs are both different. So as I said, there is no slap echo so what should I treat the room for? Any suggestions?