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Another nested basshorn design

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_djk_ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Topic: Another nested basshorn design
    Posted: 30 October 2007 at 1:48am
This design has a large front cavity to eliminate the dip above Fc for a small horn mouth.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 30 October 2007 at 1:50am
By sectioning the cabinet at the line, and adding a hinge where shown, the cabinets will nest for hauling eight in a standard cargo van (4'x4'x8').
 
 
 


Edited by _djk_ - 30 October 2007 at 8:10am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 30 October 2007 at 1:51am
Fold out the wedge, and this is how they would set-up.
 


Edited by _djk_ - 30 October 2007 at 1:52am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hifiger Quote  Post ReplyReply Direct Link To This Post Posted: 30 October 2007 at 5:03am
looks like a really space efficient design!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tommysb Quote  Post ReplyReply Direct Link To This Post Posted: 30 October 2007 at 8:49am
that setup negates the need for a large rear chamber to compensate for the small mouth, the mouth looks decidedly large!


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Disco Stu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 30 October 2007 at 12:07pm
My kind of horn - so thats a 40Hz horn length?
 
Only problem is the requirement for a plate over the mouth area
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Timber_MG Quote  Post ReplyReply Direct Link To This Post Posted: 31 October 2007 at 4:00pm
Just stack enough that it no longer really matters :)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2007 at 1:49am
A 2x2 stack is about 8' tall, you won't get much more output with a top plate.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2007 at 4:42am
Your gonna have to put a guard rail up to stop bass heads standing in themShocked
 
I'd like to hear these when they're doneWink its getting exiting now what with your design and Levs etc, bout time too.
 
 


Edited by mykey - 01 November 2007 at 5:57am
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_djk_ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2007 at 9:53am
The basic design and drawings are by Bill Woods, a commercial horn designer with 30+ years experience.
 
My contribution is the nesting scheme.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pgolde Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2007 at 8:33pm
What driver was this horn designed for? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 11 November 2007 at 1:26am

Kind of a 15" version of the Lab 12 driver. Fs in the low 20s, Vas over 10 cu ft, Qts 0.30~0.40, high x-max.

The original driver was only about 92dB as a direct radiator, and came up to 100dB in the horn. One pair stacked would be about 105dB/2.83V/1M below 50hz. Four stacked as in the drawing ought to be close to 110dB/2.83V/1M.
 
The reason for posting it here was mainly conceptual. In practice I would adjust the back chamber and throat cavity for the driver under consideration, and probably simplify the corner reflectors.
 
 
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