There's an even more elegant solution if you're lookig for a seismic event
generator.  I saw a catalog listing "Bass Shakers", which are apparently a
low-frequency, high-mass device that you bolt to the floor joists from
below to turn your floor or furniture into a giant subwoofer.  I'm sure
they would work just as well bolted to a wall stud.

Dale
--
"Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only the cat died nobly."
          - Arnold Edinborough


On Sat, 18 May 2002, T.C. Phelps wrote:

> Or how about borrowing someone's nice big subwoofer?

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