speaking of "warm glow of energy" (nice image, by the way), with the bass that my M80s put out, it makes the walls move/flex, and after a while those walls warm up from the internal friction; free heating in the winter.

as long as it doesn't make the neighbors "red hot".

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery