Nice drawings. I suggest some very heavy drapes in front of that window as absorptive panels aren't going to work there. Especially if your seat is right up against the window.
Yep I used the manual. Don't recall it being specific about the amount of tilt. No substitute for dialing it in with listening though. The stand up, sit down test is very revealing if there is too much tilt.
Did you use the formula in the manual? If you set everything just right, it should sound OK as long as you don't have other problems like a bad room, or your head is too close to the rear wall.
Zd542
Yep I used the manual. Don't recall it being specific about the amount of tilt. No substitute for dialing it in with listening though. The stand up, sit down test is very revealing if there is too much tilt.