You want absorption!
If you don't you will have diffracted reflection on a panel on the wall.
If you don't you will have diffracted reflection on a panel on the wall.
Would this room treatment be worthwhile?
A pair of these https://www.gikacoustics.com/product/freestand-acoustic-panel-gobo/ sitting somewhere approx. between the edges of the flatscreen and the inner back speakers, at an angle (experiment) (i.e. neither parallel nor perpendicular to the wall behind) will work wonders. Depending on the amount of space, you may not even have to move them to watch TV. |
Front wall between the speakers one would be more inclined to use diffusion as opposed to absorption, but given your limitations, anything will be better than nothing. A blanket as suggested is going to work over too limited a frequency range. Heavy pleated curtains may work well as the first wave from the speakers will be at a sharp angle and hit multiple pleats. |