Placement is very sensitive, but it's not nearly as simple as Musicnut put it. It depends on several factors including: size of panel, separation of speakers, distance of listener to speakers, and distance of speakers to sidewalls (probably in that order--but not necessarily if one item is out of whack--such as being too close to the sidewalls). There is no straight forward formula. There are a few things to keep in mind that will help place the speakers. One is the bass and panel should be seamless--if you are too close or too far from the rear wall it will not be seamless. So try to get this part right first--its the simpliest. Second is imaging--this is where these speakers shine. I like to use female vocals (Patricia Barber or Janis Ian) to do this part. The voice should appear central and should not spread across the soundstage. There are two critical positions here. The first is the distance between the speakers. In general it can be no more than about 5 to 6 times the panel width. You can get away with a little more with smaller speakers--but this is still a good rule of thumb. Then the toe in is important. To do this start with the speakers aimed straight out--the image will be difuse. Then start moving toeing the speakers in until the voice is central and easily identified (spatially). Go a little farther, then reverse the process. When the voice becomes diffuse you know you've gone just a little too far--toe it back in a bit and you're there. Lastly, be sure you aren't too close to side walls--at least a couple of feet and I would definitly put some sound absorbers on the adjacent walls for 1st order reflections. Another tip--use a tape measure to insure symmetry--it's pretty important for these speakers, and it's a lot easier than trying to eyeball it. Have patience--and good luck.
