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Oris 150 horn?
Oris 150 horn?
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Old 12th May 2014, 10:00 AM   #1
LTD Co is offline LTD Co  United States
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Default Oris 150 horn?

I'm looking for exact dimension of Oris 150 horn. I want to build them myself. if anyone has any information please let me know and receive the first pair for free as an appreciation.
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Old 12th May 2014, 10:53 AM   #2
CLS is offline CLS  Taiwan
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You can figure out the dimensions by tractrix formula or hornresp.

In hornresp, a tractix horn with 150Hz cutoff is:

mouth: 4185 cm^2 (or 73 cm in diameter)
throat: 250.62 cm^2 (or 17.86 cm in diameter) - for 8" Lowther or other 7~10" drivers
length: 40.7 cm

The Oris 150 has roundover at the mouth, so the overall diameter is strecthed a bit to 76 cm or so.

Formula here: Tractrix - Wikipedia, the free encyclopedia


ps. I don't need another pair. Thank you.
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Old 12th May 2014, 06:52 PM   #3
LTD Co is offline LTD Co  United States
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Quote:
Originally Posted by CLS View Post
You can figure out the dimensions by tractrix formula or hornresp.

In hornresp, a tractix horn with 150Hz cutoff is:

mouth: 4185 cm^2 (or 73 cm in diameter)
throat: 250.62 cm^2 (or 17.86 cm in diameter) - for 8" Lowther or other 7~10" drivers
length: 40.7 cm

The Oris 150 has roundover at the mouth, so the overall diameter is strecthed a bit to 76 cm or so.

Formula here: Tractrix - Wikipedia, the free encyclopedia


ps. I don't need another pair. Thank you.
Thanks for the input
I have Tractrix calculator but Oris 150 is different. it's not a pure Tractrix. it's a bit different. I know the basic info about them but I want the ark curve

thanks anyway,
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Old 13th May 2014, 01:22 AM   #4
CLS is offline CLS  Taiwan
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Join Date: Jun 2005
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If you had played some sims in hornresp, you would've known that minor changes to the curve affect the response very little.

And, don't forget all the 'imperfections' on the big throat and the driver itself, which is the starting point of the whole thing. In addition, such big throat mid horn is not very effective above 1-2k Hz, effort (and obsession) on the minor detail of horn contour won't give you much reward.
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Old 19th May 2014, 02:51 AM   #5
tkollen is offline tkollen  United States
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In case you are interested in buying a pair of Oris 150 horns I was just thinking putting mine up for sale at eBay. I bought mine from Doppenberg in Holland about ten years ago but I never had a chance to finish the project I had in mind. My horns are still unused, they are painted in high gloss red. Please let me know if you are interested.
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Old 21st May 2014, 06:07 AM   #6
LTD Co is offline LTD Co  United States
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I obtained Oris 150 precise plan. in case anybody needs it, send me pm
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Old 12th July 2018, 01:42 PM   #7
nautilussigma is offline nautilussigma
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Join Date: Feb 2012
Default Oris 150 Horn

Hello,




here is Jürgen from Germany.
I am inetressted in an Oris Horn 150.


You wrote, that you have the precise plan an you can send it?


(sorry for my bad english)


Is ist posible to sende it to me?


j.fleck@gmx.net or jdot@gmx.de


I hope you will answer.


Thanks a lot.


Greedings
Jürgen








Quote:
Originally Posted by LTD Co View Post
I obtained Oris 150 precise plan. in case anybody needs it, send me pm
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Old 13th July 2018, 11:17 AM   #8
Tyimo is offline Tyimo  Hungary
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Hi!
Quote:
I obtained Oris 150 precise plan.
Now can you tell us what is the difference between a conventional tractrix and the Oris horn's curve?

greets:
Tyimo
__________________
"Replacing any coupling capacitors with a well designed and correctly matched driver or interstage transformer yields an almost shocking improvement in sound..." Peter Qvortrup
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Old 13th July 2018, 12:53 PM   #9
nautilussigma is offline nautilussigma
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Quote:
Originally Posted by Tyimo View Post
Hi!


Now can you tell us what is the difference between a conventional tractrix and the Oris horn's curve?

greets:
Tyimo

HI, where is the Ortis horn curve?
have you send it to jdot@gmx.de ?
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