Hello there
I do not know if this is the right place to post
I would like to know how well my 8020 genelecs place in my home studio beside a window overlooking the street, knowing that I have a 2m space between the walls and what type of treatment to use
thanks all
ps: Sorry my English is very bad

well, glass is thin.
 
unless it is a really nice performance window, thicker glass, gas in the void, double pane...
 
are you worried about sound going out....... or coming in?
 
the glass will cause some issues with your high end, for sure...
but it is very easy...
to create a panel, with some kind of insulation or sound treatment, 
to temporarily fit into the window box while you mix.
 

this  picture of the place, so you can advise me what to do better in the treatment  " />

The window shouldn't be too big a problem. Just try to center the window between the speakers if you can, and pull them as far away from the window and back wall as possible. Your biggest problem will simply be that the room is small. Are you willing or able to add acoustical treatments to the room?

Yes I will do the necessary treatments in the room, I want to stay face to the window just to be a bit more  inspired   to work :)

Start with a visit to Ethan Winer's Realtraps site. There is a lot of excellent information there on acoustic treatments you can do yourself. You're going to need lots of absorption in that room, especially in the corners.

some random links
 
http://johnlsayers.com/phpBB2/viewforum.php?f=1
http://www.acoustimac.com...rtuemart&Itemid=21
http://www.readyacoustics...=index&cPath=26_11
http://www.atsacoustics.c...ic-Materials--102.html
http://forum.studiotips.com/viewtopic.php?t=535
http://www.realtraps.com/index.htm

http://audio-video-supply...E.y=0&IMAGE=search
http://www.gikacoustics.com/products.html
http://www.theprojectstud...ook.com/articles15.htm
http://www.clearsonic.com/index.html
http://www.acoustimac.com/
http://www.thefoamfactory...foam/acousticfoam.html

Thanks guys :)