SMALL ROOM: A house or Condo Den, Library, Bedroom.
The B&O catalogues frequently use large, glass walled Bauhaus-style homes to advertise the B&O product with. Mies van der Rohe comes to mind. They look great of course, as any product would, but the fact is that other than the very wealthy, large homes are not being built much any more. The end result is that the rooms are becoming smaller in general with Apartments, Homes, and Condos.
However, some of the new Pre-Fabricated homes in Europe, Japan, South and North America actually lend themselves to B&O given the application of glass, wood, and aluminum inside, although in a smaller scale.
The Condo, we have in Brasil is six inches of solid concrete, walls and ceilings. Not prefab, but full European-style solid construction, by an Italian builder. We tried the BL 4000 there, and brought in back, in favour of the BL 4. The Reverb-skip effect with the BL 4000 was similar to an echo chamber; A caller in Switzerland noticed this right away while speaking on a Beocom 2 with the music going in the background.
This would be great if we were hosting a Rave or a Techo-Konzert, but we go to Brasil to unwind, and not to wind-up. ( But I do sneak a little techno in now and then via Virus shake on N.RADIO ). Here the BL 4 is just fine.