Pick up a dozen or two 5' artificial Ficus trees from a big box discount home dec store like At Home (@Home). Scatter the artificial trees around the room focusing on behind and to the sides of the speakers and behind the listening position. The artificial Ficus trees act as sound diffusers and absorbers.
I bought mine at At Home for $40 each. Completely converted my listening room, got rid of all kinds of room problems. And they are appealing as room decorating accessories.
I bought mine at At Home for $40 each. Completely converted my listening room, got rid of all kinds of room problems. And they are appealing as room decorating accessories.