Terribly sorry. I didn't see your png file before. DUH.
Dimensions don't look too bad.. it is small - what is your height?
The centers of your speakers should be 2' apart and you 2' from them.
IMO, Trap all the corners, create a rfz around your speakers & you are off to a good start.
If I had the height, I could give you a pretty accurate idea of where to position yourself.
cheers,
John
__________________
John H. Brandt
Recording Studio Design/Consulting, Acoustics, & Electronics
Jakarta, Indonesia
go to
http://jhbrandt.net & sign up for my free newsletter "Studio Design News"
"Twenty thousand dollars worth of Snap-On tools does not make you a Professional Diesel Mechanic"