I see my post was lost (server crash ?)

I use 3 x 5200 (front) and 4 x 3100 (side and rear) and one SW1600.
The room is a room-inside-room construction of 3.2 x 4.2 x 2.4 meters (WxDxH)

There is plenty of low information in this room. It does not compare to a concrete box shaped room sound wise, as it hass in the horizontal plane only one 90 degree angled corner and no parrallel walls.

Sold all M equipment