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#51 |
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diyAudio Member
Join Date: Jul 2003
Location: San Diego, CA
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Bill F.: As always, you present an incredible amount of useful, pertinent information in very little space. I always look forward to your posts!
I have a pending patent for the use of a full or partial vacuum on the enclosed side of the diaphragm and am always quite interested to see how others have attacked the 'self-important' In my vacuum subwoofer prototypes I use half-roll surrounds comprised of a layer of rip-stop nylon (for strength) and a layer of Mylar (to stop in- and out-gassing). It forms an extremely compliant, low loss surround with no limits on excursion. The diaphragm is ½ inch thick honeycomb-core aluminum laminate. I love this speaker-building stuff!!! ![]() -Casey Walsh |
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#52 |
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diyAudio Member
Join Date: Nov 2001
Location: SW MI
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Interesting! I can't see your drawings for some reason, (could you attach one to a post?) but it sounds a lot like something I was chewing on a couple years ago. Here's an early rough drawing from my sketch archives. This one uses a DC servo motor.
Good luck! |
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#53 | |
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diyAudio Member
Join Date: Jul 2003
Location: San Diego, CA
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Quote:
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#54 |
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diyAudio Member
Join Date: Feb 2003
Location: US
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__________________
perspective is everything |
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