Laurence Payne wrote:

On Sat, 09 Sep 2006 09:10:18 +0100, Rob
wrote:


I thought it was more to do with air being pushed out of the rear reflex
port and hence proximity to a wall.


It's sucked in precisely as much as it's blown up. Otherwise your
speaker enclosures would either implode or blow up like a balloon.

Air blowing out of the port is more directional than air sucked in.
The forces may be measurable but are too small to propel a cabinet.

I have had a speaker without rubber feet slide down a shelf that wasn't
perfectly level and jump off the edge. It may have been driven to suicide
by the volume and the quality of the music. :-)

--
Eiron

No good deed ever goes unpunished.