The experiment was a succes. The Beosound 1 did a good job. On saturdaynight my wife and I saw the movie Hidalgo.
The movie was 200cm wide instead of on our Beovision 7-32 which is 70cm wide.
On sunday afternoon I closed the curtains, set up the beamer again and witnessed the movie 300. Now not with the Beosound 1, but with the A8 headphones. Because I don't want to wake up my wife and son who rest some time during the day.
It was a succes because we could project the movies directly on the wall. The wall has a vanille kind of colour. But did didn't affect the colours of the movie.
My wife has seen the possibilities of a beamer and projecting directly on the wall. That is the first step to actually setting up a permanent beamer in our living room.
Now I hope she will bring the beamer more often.