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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Compressibility of rear chamber "stuffing"Posted by jessie.dazzle on: 8/31/2010
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I didn't know rigid (hard) foam was available in a spray can.
Be careful; if you're using proper rigid foam, it expands with great force and would likely push through any tape protecting the cone of the driver.
However, the only really rigid foam I know of is a 2-part product that must be mixed in proper proportions. If high density is desired, the reaction must take place in a confining (volume-limiting) and very strong container.
http://www.uscomposites.com/foam.html
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