I have my WP7s in a 13.5 x 17 foot room with one corner squared off by a fireplace, and two thirds of one of the side walls opening out into a much larger, reasonably well damped room. Because of the enormous amount of acoustic energy these speakers generate, I found that I had to treat the corners, walls and wooden floors to eliminate some harshness that obscured detail. About $600 bought me some inexpensive, but quite beautiful oriental rugs of various sizes from Ikea, which I put on the floor and mounted on the walls. Some inexpensive Roomtunes pillows (stuff I had from long ago and forget the price of) were placed into the corners where the walls meet the ceiling. This has banished all but a hint of echoslap that is intrusive only on certain opera recordings, played at tremendous volumes. I wouldn't be surprised if the full ASC treatment is more effective, but I'm very, very pleased with the current results. In summary, while I am no acoustician, I would predict that you could obtain some pretty spectacular results with the judicious application of absorptive materials to the walls and floor.