Sure. Cut a sheet of OC703 to make a test panel and stick it up raw wherever you think it might work. Listen and compare. Don't really need 2", for treble/midrange 1" will do fine. Pin cushion pins (the ones with the little round plastic knobs, not push pins which are thicker) will hold them fine at least temporarily and be invisible from a few feet away.
These panels are best done sparingly. Might start with a couple 12" triangles cut to fit in the front ceiling corners. Then some 10x48 cut to go where the side walls meet the ceiling and/or where the side walls meet the front. These locations are really effective at the kind of noise you're getting without making the room seem damped. There's probably pros with better ideas but this worked great for me.
The raw test panels in this old photo have all come down leaving only the dark fabric covered ones in the corners, so you know what I'm talking about. http://www.theanalogdept.com/c_miller.htm
These panels are best done sparingly. Might start with a couple 12" triangles cut to fit in the front ceiling corners. Then some 10x48 cut to go where the side walls meet the ceiling and/or where the side walls meet the front. These locations are really effective at the kind of noise you're getting without making the room seem damped. There's probably pros with better ideas but this worked great for me.
The raw test panels in this old photo have all come down leaving only the dark fabric covered ones in the corners, so you know what I'm talking about. http://www.theanalogdept.com/c_miller.htm