On Fri, 26 Dec 2003 15:17:13 +0100, Peter Larsen
wrote:

Stewart Pinkerton wrote:

Nobody seem to worry about air distortion ...

Could you give me a pointer to such a site? It's the idea of a *big*
hole in the ceiling that is caused WAF problems.

http://t-3.cc/users/audioworx/page13-12Shiva1.html

- a subpage of http://www.klone-audio.com/ - 12 large bass units firing
into a box with an estimated 12 by 12 inch opening into the listening
room.

Very impressive! Especially considering the ratio of driver area to
throat area.

For a more practical implementation of using multiple loudspeakers one
should in my opinion think differently. I would arrange a row of
loudspeakers on the loft in each side of the room and let the sound
enter the room via a long slit near the ceiling/wall junction. It would
still be possible to mount the loudspeakers vertically for longevity
(playing "downwards-sideways" into the slit) and it could be implemented
very discreetly. It will also provide a superiour coupling to the room.

A slit is certainly an option in my room, although I might have to
write my own modelling program! :-(

Peerless has a 10" sub-bass that looks about right if used in multiples.

At the moment, a pair of Adire Tempests looks to be the most likely
solution.
--

Stewart Pinkerton | Music is Art - Audio is Engineering