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Bending mid horns

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gen0me View Drop Down
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    Posted: 12 February 2017 at 12:28pm
Does anyone has experience in bending horns. Im thinking about horn going to 3-4kHz. Very long horn. How far can I bend it?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 1:29pm
You could bend it but it's unlikely to sound good.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 1:31pm
Horns below 500 hz can be bent or folded. Lots of models on the market that sound good. Horns from 500 Hz to 5000 Hz should not be bent or folded. Not many folded or bent mid horns that sound good. Bent mid horns may sound like a paging horn. If you must make a bent mid horn make the curve as smooth as possible.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 1:55pm
I understand that option 2(with straight walls) is failure.
How about option 2? Lets say the horn canal would be drilled so the shape could be any. Any chance of reaching at least 3kHz? to connect it to nice 1" driver? I want to try some more HiFi crossover range.

Or only straight horns like Unity can go so high?

Any examples of bend horns? Good or bad.


Edited by gen0me - 12 February 2017 at 1:57pm
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Thomas Hosker View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thomas Hosker Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 5:56pm
Why does the horn need to be so long, to need to have a fold? Whats the intended lower cut off?

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gen0me View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 7:14pm
To reproduce everything over basses. Right now Im in the middle of making one playing to 1kHz. Im curious if it is possible with different HF driver. If this one sounds good.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 7:33pm
As long as the horn expansion is always smooth and continuous, in theory a bend should not matter. But when you get into it the radius of a bend vs frequency will probably begin to have an effect.

You can see the effect in an impedance plots when the peaks that due to horn transmission are damped in magnitude as you go up in frequency, walls are absorbing the sound.


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gen0me View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 8:00pm
What can be the radius?
Can I simulate bend in akabak?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bitSmasher Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 8:50pm
Have a look at the DR**0 horns by Bill Fitzmaurice for ideas
"Battery Acid Sound System" blog hopefully happening in 2017
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SouthwestCNC Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 8:59pm
what effect will the bend have on directivity? Out of interest.
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gen0me View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 9:30pm
I checked them(DR200) but cant find any info how high is crossover. Only size of HF horns could get ROUGH idea. What are recommended speakers?

On intuition the directivity should be dictated by shape of bend end and exit of horn. Ofc bend should be narrow to keep similar patchlengths. Now I see where DR shapes came from.
Am I right? Whats DR directivity?
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Post Options Post Options   Thanks (1) Thanks(1)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2017 at 10:48pm
"You could bend it but it's unlikely to sound good"

https://www.youtube.com/watch?v=fYhpRlY_EfM

A straight horn sounding like S*it.

https://www.youtube.com/watch?v=wNFK4w9NgoM




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