Would this room treatment be worthwhile?

I have a 63" wall mounted plasma TV between my Rockport Mira 2 speakers.  The Rockports are 11 feet apart and 3 feet from the back wall.  I'm thinking of designing and hanging some sort of heavy fabric cover over the entire surface area of the TV when I'm listening to music in hopes of improving SQ (i.e. absorption, imaging).  Have any of you tried this with positive results?  If so, what do you recommend the cover consist of?  My wife is pretty handy with a sewing machine so I could fit fiberglass insulation between two blankets or comforters if need be.  Other ideas would be appreciated.

My floor is carpeted and I already have 6 RPG "BAD" panels mounted at various positions around the room so this is not my first attempt at room treatment.  The room is in the basement and dimensions are 20'W X 25'L X 9'H  with the system along the 20' wall.
I know I could just go ahead and try something but I wanted to see if others already had before I put my wife to work!
Stillpoint Apature Acoustic panels are the best by far.They make a noticeable difference in acoustics in any room.
@ebm  A Stillpoints dealer is bringing a few of the Aperture panels for an in home demonstration. I'll reach out via message for more details on your experience. Thanks.
When I listen to music in bed the 80" mirror on my headboard caused lots of reflection.  I installed a sound absorbing window blind.  Works great.
I’ve experimented for years in my room. Before putting your wife to work, go find some dacron. It’s available at upholstery vendors in various sizes. It can be halved by carefully separating/splitting it, for experimentation. In large rolls, it comes mostly as 3/4 oz or 1 & 1&1/4 oz thicknesses. I use is currently behind my thin curtain on the front wall covering my center window. I just hang it with zip ties to the curtain rod. Experimenting with different thicknesses is very enlightening.
Good Luck!

IME, going heavy, sucked the life out of the music.