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In the Forum: Horn-Loaded Speakers
In the Thread: Midbass Horns and Real Estate.
Post Subject: Make your ownPosted by JLH on: 8/7/2009
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The way I would handle this is make my own 4" exit compression driver. What I mean is select a woofer with known good sonic qualities that match your requirments. Then make a phasing plug for it. My past attemps have been decent. However, I have noticed that most woofers (cone drivers) do not want to see much more than 6.5 : 1 compression ratio. You can make a perfect casting of the woofer and use this as the blank to begin machining the phasing plug. See below pictures for an example for 5" woofer.
Cover woofer with Parafilm thermoplastic
combine fast setting resin according to instructions
Pour resin up to the correct level
Allow resin to set up
Pop the phasing plug blank off of woofer - now machine it
Rgs, John Rerurn to Romy the Cat's Site