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Old 6th June 2006, 01:09 AM   #1
Paper mache horn fabricator
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Default Here's a spiral bass horn I'm designing

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Old 6th June 2006, 02:03 AM   #2
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That should be pretty!
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Old 6th June 2006, 02:07 AM   #3
Paper mache horn fabricator
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I'll probably fabricate it from wire mesh and plaster--paint it with a pretty faux finish.

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Old 6th June 2006, 03:36 AM   #4
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very cool, please keep us updated on your progress
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Old 6th June 2006, 05:30 AM   #5
Paper mache horn fabricator
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Default I'll do that.

I suppose I'd better take pictures...
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Old 7th June 2006, 03:45 PM   #6
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Snail shell, I mean golden ratio yes?
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Old 7th June 2006, 05:27 PM   #7
Paper mache horn fabricator
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Default no...

There was no intentional thought given to a golden ratio. The horn doubles its area every 36" or so. It's a curved horn, so the X axis doesn't apply for length. I moved the axis outwards to the 5/8-3/4 point and measured from there.

This is a 20hz horn meant to be loaded in a corner. Being truncated, it will require EQ, but seems like a doable experiment. Beings that there are no hard reflective angles, the output may register a higher frequency before tapering off.

I base this notion on the fact that I can get fairly high frequency response from my goose-neck bass horn.

John
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Old 14th July 2014, 12:52 AM   #8
Paper mache horn fabricator
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I've improved upon the design, made it MUCH larger!

Here's some snapshots of the fabrication process:
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File Type: jpg 7-13-2014 003.JPG (208.3 KB, 271 views)
File Type: jpg 7-13-2014 009.JPG (202.4 KB, 249 views)
File Type: jpg 7-13-2014 013.JPG (235.7 KB, 250 views)
File Type: jpg 7-13-2014 019.JPG (235.5 KB, 249 views)
File Type: jpg 7-13-2014 020.JPG (194.7 KB, 170 views)
File Type: jpg 7-13-2014 022.JPG (177.6 KB, 172 views)
File Type: jpg 7-13-2014 044.JPG (190.6 KB, 158 views)
File Type: png True SPL.PNG (52.7 KB, 156 views)
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Old 14th July 2014, 12:57 AM   #9
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I see the original post took place in 2006!! My god, have I been working on this project eight years?!?
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Old 14th July 2014, 01:06 AM   #10
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super cool.
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