[microsound] Infrasound loudspeaker

["Sune T. B. Nielsen" <suneni@xxxxxxxxxx>]

Hi
I'm doing a sound-istallation with infra-sound and hoped I could do with 4
old (partly working) standard hi-fi subwoofers together with my 4x12"
Marshall bass cabinet. The woofers are a bit better than expected, but I
did'nt expect much, whereas the bass cabinet performs really lousy
(distorting at very low volume).

Therefore I decided to buy a better one and in my search I found this
infrasound loudspeaker that plays 17hz at up to 100dB!
http://www.npl.co.uk/acoustics/consultancy/airborne/infrasound.html

Could I build a similar one from an old 12" driver and some drain pipe in
the right length? (at least I am going to try it, since its very cheap)
Or are there alternative ways of building such a thing.
Or are there subwoofers/speakers that you can buy for around $200 that could
play 12-30hz - maybe not at 100dB, but enough to get a physical expirience..

Thanks in advance
Sune TB


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