[sdiy] sXeXmXi ot: loud speaker for synths

[Dave Krooshof]

>TIm Daugard wrote:
>
>>  > The other problem with an 18 inch cab is you need another speaker for the
>>  > articulation. 18s aren't good for much above 1000 Hz (or less).
>>
>>  However 21 Hz at 100 watts into the 18 inch (Bass low E into a frequency
>>  divider) shook the bolts out of the ceiling for the sound 
>>deadening panels over
>>  the keyboards in my studio. :-()
>>
>>   Tim

>I guess we will have to launch a military expedition to remove
>your "speakers of mass destruction"   :^P
>
>H^) harry  (now cringing in his flamesuit :^)
>

Don't forget you need to take the room into account here.
Either it wants to resonate on a bass frequency, or...

If you hit it for some time in it's resonance frequency, you
do not need to produce all the energy at once, but you can
build up the amplitude over time. This way, you will surely
manage to damage the entire block, and they'll never know what
hit them.

There's a famous club here in the Hague (.nl) called "Het Paard"
and it recently underwent a major reconstruction, because they
needed to have more capacity (audiencewise).
Another famous project in the Hague is the tramtunnel that keeps
being flooded and is years overdue. The old Paard suffered
heavily from drilling the tunnel. Inches wide cracks ran down
the walls. The tunnel still isn't finished, the Paard is, though.

Before the Paard was closed for a few years to do the work,
they organised a big party. An artist placed a dozen unbalanced
washing machine motors, screwed them to the walls where the iron
wall-anchors were, and tuned them with variacs so that the walls,
and finally the whole building, was vibrating. Brrrrrrrr...
The cracks got A LOT bigger. A LOT.

-- 
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groets,

_          >^v<        _

website http://www.dendriet.nl