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In the Forum: Horn-Loaded Speakers
In the Thread: Jessie Dazzle Project
Post Subject: 115 Hz made easyPosted by jessie.dazzle on: 6/23/2008
And now, going back to page 2 of this thread; here we pick up with some shots of the upper bass horn and the associated primitive "tooling"
Mold without core
Mold with core. Before core is put in place, mold is loaded with a thick
coat of plaster and hemp, which is visible here. Once this starts to solidify,
a pair of ropes are slipped in. From there, the mold is topped off with plaster,
which is allowed to set up hard.
Natural expansion of the setting plaster helps kick out the core (with the
rubber mallet seen in the background)
Here the core has been set aside and the inner surface
of the horn is for the firt time visible.
Lifting the horn half out of the mold; this is how to do a 4-man job with
the help of only 2 cats (later the part will lose about 100 lbs in water,
dropping down to a lithe 210 lbs for the half horn).
While still fresh and damp, the plaster is easy to work;
at this point both halves of one horn are positioned on
end facing eachother (held together by rope out of view
of the camera), and the gap is adjusted until no light
passes (and the inspector in the foreground says its ok).
Making sure the horn sits properly in the lower part of
the frame.
Another view of the horn sitting in the frame (this is
the point when the WAF went all squirly on me).
More photos (finish work, and the setup in the new place) coming later.
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