Thanks everyone! The problem in my room was indeed in the 1st reflections on the ceiling and 1st & 2nd reflections on the side wall. We damped the ceiling simply by placing a carpet covering the 1st reflection point for both speakers (it looks nice, too) with a foam between ceiling & carpet as extra protection. Ditto with 2nd reflection points on the side walls, with smaller rugs.
Ofcourse, I have to review speaker placement again; but already, high frequency details / space between instruments, are more palpable.
Thanks again, all!
Ofcourse, I have to review speaker placement again; but already, high frequency details / space between instruments, are more palpable.
Thanks again, all!