Looking at building a Yuichi A-290 horn I soon realized that’s beyond my woodworking abilities.
I could however manage a conical horn along the likes of this:
And maybe add a slight roundover to the throat and mouth.
Have anyone tried something like this?
I could however manage a conical horn along the likes of this:
And maybe add a slight roundover to the throat and mouth.
Have anyone tried something like this?
Absolutely. You may spend some time tweaking and adjusting things to learn why it isn't perfect, but this is the kind of learning you want to do at the beginning. It helps you later.
I'll just add this - https://www.diyaudio.com/community/threads/is-it-best-to-use-a-non-axisymmetric-waveguide.375799/
I'll just add this - https://www.diyaudio.com/community/threads/is-it-best-to-use-a-non-axisymmetric-waveguide.375799/
Hi,
you can simulate this very kind of device using the tool Ath (https://at-horns.eu/, download Ath 4.9 PRE-RELEASE) and an old ABEC trial version, possibly the new AKABAK as well.
A smooth termination is critical. What you show would be quite sub-optimal.
you can simulate this very kind of device using the tool Ath (https://at-horns.eu/, download Ath 4.9 PRE-RELEASE) and an old ABEC trial version, possibly the new AKABAK as well.
A smooth termination is critical. What you show would be quite sub-optimal.
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BTW, if you could bend the boards, a lot better device can be built (Ath script included):
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7131988
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7133359
3D overview: https://seznam848.autodesk360.com/g/shares/SH35dfcQT936092f0e43a6f12cf091d04668
(with a 3D-printed throat adapter which is not strictly necessary but recommended)
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7131988
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7133359
3D overview: https://seznam848.autodesk360.com/g/shares/SH35dfcQT936092f0e43a6f12cf091d04668
(with a 3D-printed throat adapter which is not strictly necessary but recommended)
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i have made some simple horns in masonite and used hornresp for simulation, i made some with secondary flare too, i guess one could use the bill waslo's cosine excel-sheet to design the horn and also get the size of each panel to cut
A JBL SRX712 horn should be fairly easy to make, the shape appears to be simple.
https://reconingspeakers.com/wp-content/uploads/2015/01/353299-001-3.jpg
Axisymmetric horns can be turned like pottery, using their 2D profiles.
https://reconingspeakers.com/wp-content/uploads/2015/01/353299-001-3.jpg
Axisymmetric horns can be turned like pottery, using their 2D profiles.
Wow, lots of responses here! I'll take a look at the software and the ath scripts provided.
The horns should be of similar size and shape as the Yuichi A-290.
I can theoretically bend the boards by cutting slots (Kerf bending) using by table saw. Might be worth it
The horns should be of similar size and shape as the Yuichi A-290.
I can theoretically bend the boards by cutting slots (Kerf bending) using by table saw. Might be worth it
or even 3D printing: https://sphericalhorns.net/2022/09/...timized-william-neile-horns-part-2/#more-2378
The Edgar tractrix midhorn is quite an easy build, but the LE-5 driver is probably difficult to source now. I was pleased with the pair I built myself.
Rob
Rob
Horns like Mabat linked in post #4 can be built using bendable plywood, (AKA bendy-ply, Curve-Ply, Flexply, Wacky Wood and Wiggle wood etc.).
Plywood made with the veneer layers all running in one direction can bend easily without cutting slots.
Wish I had known about bendy-ply when I was building curved horn walls, would have saved a lot of sawdust..
Art
Last year, for fun, I made a horn like object using 2x quarter slices of 6" pipe. I have no idea how to calculate its parameters, but it worked
Tried the software on both Win 10 and 11, but it just opens and immediately closes again 🤷♂️
Bendable plywood could actually allow me to manage building a pair of Yuichi's.
How does a conical horn with optimised throat and mouth roundover compare to the more advanced shapes?
Conical (optimised) offers more constant directivity. It is also a larger device, but for a given length and mouth size it holds directivity lower in frequency, and ideally it won't beam although sometimes the highest frequencies are limited by the driver itself.
I haven't used it, but Celestion has that wizard that may be of use somehow. Perhaps someone who knows can comment.
How do people here go about exporting the horn profile to something physical like a jig or paper drawing?
If you are hand crafting the horn you probably want simple (flat) wall surfaces. Depending on the calculator's output, you could print CAD cross sections or take measurements from the CAD files. This would allow you to markup plywood for cutting or making jigs. Keep in mind you actually need the "flattened" version of the horn wall to cut a piece of material.
If you have simple flat surfaces and they bend in 1 plane then you could use Hornresp to produce and export the CSV XYZ coordinates or prints. Hornresp can calculate the profiles for 10 different standard horn flares. It can also calculate them as n-petal horns. I've attached a few that were made from foam board and hot glued but it would also work for thin/bendy plywood. It can provide the "unfolded / flattened" shape required for the material cuts. Fun, low budget playing around.
If you have simple flat surfaces and they bend in 1 plane then you could use Hornresp to produce and export the CSV XYZ coordinates or prints. Hornresp can calculate the profiles for 10 different standard horn flares. It can also calculate them as n-petal horns. I've attached a few that were made from foam board and hot glued but it would also work for thin/bendy plywood. It can provide the "unfolded / flattened" shape required for the material cuts. Fun, low budget playing around.
