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Old 19th October 2012, 09:25 PM   #2921
Mark Kravchenko --- www.kravchenko-audio.com
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Default Some ways I did it:

Some of the construction pictures.

Made up of 3mm Baltic Birch plywood bent over a curved form.
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Old 20th October 2012, 05:44 AM   #2922
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Quote:
Originally Posted by NEO Dan View Post
I guess it would be an accurate visual representation of an axisymmetric (round) horn,
Just to clarify - the Hornresp schematic diagram will be shown correctly scaled provided that the display monitor screen pixels are square. In other words, the chosen screen resolution needs to be consistent with the aspect ratio of the display monitor. If not, the picture will be elongated or compressed in either the horizontal or vertical direction.

For example, if the display monitor has a screen aspect ratio of 16 : 9 then a compatible resolution would be 1280 x 720 pixels. A resolution of 1280 x 1024 pixels on the same monitor would show the schematic diagram to be elongated horizontally.

Kind regards,

David
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Old 20th October 2012, 05:51 AM   #2923
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I finally fired up Hornresp for the first time, had it for years on the HD.
Thanks Mr. McBean!

Good point on the screen aspect ratio.
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Old 20th October 2012, 05:54 AM   #2924
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Quote:
Originally Posted by Kolbrek View Post
In any case, I would trust the exported data more than the schematic.
Further to Bjørn’s post:

1. The Hornresp standard exported data for a Le Cléac'h horn will generate a profile identical to that shown in the schematic diagram. The maximum permitted mouth flare tangent angle is 180 degrees. Both the schematic diagram and the standard exported data are calculated using Jean-Michel’s 2007 profile.

2. The Hornresp optional "exact profile" exported data for a Le Cléac'h horn produces a slightly different but theoretically more accurate profile for an axisymmetric horn. The profile is by default automatically generated out to a mouth flare tangent angle of 360 degrees.

3. The attached screenprint shows the difference between Jean-Michel’s 2007 "improved" profile (blue curve) and the more accurate "new" exact profile (green curve). Note the subtle differences near the mouth.

4. See Jean Michel on LeCleac'h horns for further background information.

5. It is recommended that the theoretically "exact" profile data be used when constructing an axisymmetric Le Cléac'h horn - simply truncate the mouth at the desired flare tangent angle, if less than 360 degrees.

Kind regards,

David
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Old 20th October 2012, 06:12 AM   #2925
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Quote:
Originally Posted by ßart West-VL. View Post
I finally fired up Hornresp for the first time, had it for years on the HD.
Hi Bart,

In that case it is probably worth downloading a copy of the latest release, before going too far :-).

Kind regards,

David
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Old 20th October 2012, 06:19 AM   #2926
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Yes, I thought of that, lol.
Now I'm busy trying to design a bass-reflex. I'm getting loads of help from a forum member trough E-mail.
Using the program is one thing, but understanding what's on display is something else. So, lucky me to have an experienced member wanting to put time and effort into a novice.
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Old 20th October 2012, 11:32 AM   #2927
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David, thanks a lot. Now its more clear for me.

Does 360 degree profile have some advantages over less tangent? 180 for example?

Last edited by Charcoal; 20th October 2012 at 11:48 AM.
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Old 20th October 2012, 12:18 PM   #2928
Mark Kravchenko --- www.kravchenko-audio.com
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Quote:
Just to clarify - the Hornresp schematic diagram will be shown correctly scaled provided that the display monitor screen pixels are square. In other words, the chosen screen resolution needs to be consistent with the aspect ratio of the display monitor. If not, the picture will be elongated or compressed in either the horizontal or vertical direction.

For example, if the display monitor has a screen aspect ratio of 16 : 9 then a compatible resolution would be 1280 x 720 pixels. A resolution of 1280 x 1024 pixels on the same monitor would show the schematic diagram to be elongated horizontally.
That makes sense. Because I'm working on a 32 inch 16:9 Monitor/TV
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Old 20th October 2012, 05:46 PM   #2929
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Hi, David! Thank you for your program! It did quality breakthrough in world of Horn speaker building enthusiasts!

I have a question and/or proposal.

How I can simulate an offset port? The hornresp have an ability to calculate an "Offset speaker" system, but what i must do to simulate speaker with offset port, like PMC GB1i (in attachment) ?

Maybe it makes sense to add an "Offset Port" and "Offset Speaker and Port" modes, not only the "Offset Speaker" mode?

Thank You.

Alexander Rogozhin.

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Old 20th October 2012, 06:05 PM   #2930
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Yes, I support Rogozhin`s request. Also wanted always to have opportunity to simulate offset port.
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