As you can see from the pictures I have a cabinet between my speakers, though the speaker baffles are out in front by several inches. In the middle of it is a large cavity (50"w x 49"h x 24"d) housing a new tv (46" plasma). Had to remove the doors to fit the tv so no longer able to hide the cavity and tv while listening to 2 channel audio (without video of course).


Should I treat only the tv (perhaps heavy blanket) or do I need to treat/cover the entire cavity?
And if I need to treat the cavity, must the treatment fit tightly?
Panels? Diffusors? Heavy blanet?
Any suggestions? I sit about 12 feet away from the speakers.