I get a decent --tho mild-- improvement in imaging and reduced treble hardness from placing a faux ficus tree between each speaker and the rear wall. Each tree has natural branches densely fitted with silk & wire leaves & twigs. Each is about 6.5 ft. tall, and is "potted" in light-weight wicker baskets w/ realistic faux ground cover. IMHO, the visual effect is pleasing, softening the hard lines and planes of techno gear, partly camouflaging cables, lending a more organic feel and ambience to the listening room.