It is reflective and it is also absorptive (depends on how thick and what type the wood is ), but are we all that concerned with reflectivity below a chair rail? To some degree yes, but mostly no. Don't take the above drawing to scale nor as a true room. It was not intended to be that way. All it is depicting is some ideas. No sound aspects of sound analysis was done for this room.Is that wood paneling? Isn't it reflective?
No sure what you are quire asking here, but if you plan to permanantly enclose 703 inside of a wall, I would not do it. If it gets wet, it will cause mold to grow. Good luck!can I put 703 in the 2x4s framing the front wall or does it need to go on top of it?
Or it could be sound panels framed into wood panelling.You can do some wood on the bottom but not with 4" or so of ear level. Some folks make the inlays cloth and just strips of trim to frame it.