I just bought this from a local hi-fi shop. It's a one off using a Mackie 12" driver (no more details than that) and his own 140W amp. Dimensions are 625mm tall and 474mm width and depth. I'd guess it weighs somewhere between 30 and 35 kg. The design is something I've never seen before. It fires upward onto a dispersion plate which is like an upside down pyrimid. There is no crossover or anything fancy. Just a single port at the rear (about 3-4" I think, not measured), a low level input and a gain control. The only thing I've compared it to is my Velodyne CHT-10 which it comfortably beats, though I'm judging purely by ear. It is designed for hi-fi rather than HT use.