"Joseph Oberlander" wrote

Regardless of what they say, wall mounting a dipolar speaker
is a bad idea. Conventional cabinets absorb the backwave.
Wall mounting these speakers would cause the backwave to
propagate right through the panel.

These are curved and are mounted on a metal open frame - so
the sound isn't too terribly messed up from backwaves. Also,
because it only goes down to 100hz or so, the backwaves are
minimal.

Sound Labs has a product called the Sallie ($970 pair)
http://www.soundlab-speakers.com/accessories.htm
which acts on the backwave propergation phenomena.