On 17 Nov 2004 20:12:45 GMT, ohawker (Andy
Evans) wrote:

Don - I was thinking of ported. If I use a 5" I can get decent bass from a
ported 21 litre enclosure with one of two drivers like the MW144 for instance.
Decent = reasonable response at 40hz.

It is certainly going to be dropping a bit by 40Hz, but it won't be
very loud in the bass. At 5" diameter you need a great deal more than
the 3.5mm displacement of this unit to make any serious amount of bass
noise.

My Adire tempest is 15 inches, and has plus or minus 16mm of movement
- that is more like the sort of thing you should be aiming at. OK, you
can't put that sort of diameter into the tube, but to get the volume
you must compensate by greater excursion. Two drivers help, but you
must then use double the cabinet volume for the same shape response.

d
Pearce Consulting
http://www.pearce.uk.com