By the way milhorn you are right about the waveguide redesign impact... I redesigned mine and not only my rear porthole geometry then the tweeter waveguide matter a lot...( the impact on timbre and soundstage is evident as is evident the redesigning impact of the rear porthole redesign geometry as is evident the role of reflected waves done right even in near listening field ...
But the room acoustics is not replaced by any waveguide either ...It contribute in a way the waveguide could not , and the wave guide contribute in a way the room could not ...
I want optimal results not only room acoustic or wave guide alone ...I did the two and more ...My low cost system is very good now ...
That’s why the sound must sent to the listener rather than send to walls, floor and the ceiling. **80% left side of my room is the glass doors. Alewx/WTA