yes they are very nice, the nicest ive heard. the theatre is isolated, so you cant hear it elsewhere under normal levels. velodyne has replaced the hgs-II with a digital drive series, that adds a calibration mic and a few settings, same drivers/amp though. 1 would be enough for most rooms, they are thx ultra2 rated. i could use just 2, but im not paying to use the other 3 so why not.