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Old 19th June 2013, 02:34 PM   #3541
tb46 is offline tb46  United States
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Hi simonpink,

For a standard folded construction, with equal duct height (width) throughout the enclosure, you might set the height to the internal enclosure height (width), e.g.: 40cm, and use smaller increments, e.g.: 2.54 (if you want to work in inches). I like to just calculate the values for duct height @ e.g.: S1 in a spreadsheet, and draw the results in a CAD program as a profile. Then I get my values from that drawing.

Regards,
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Last edited by tb46; 19th June 2013 at 02:36 PM.
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Old 19th June 2013, 05:04 PM   #3542
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So I put 40 in the height column like this?
When I open the exported excel file from that I've got height measurements of 20cm? And the product of the width and height isn't equal to the area at each increment along the S1 section, or any of them?
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Old 19th June 2013, 05:54 PM   #3543
kees52 is offline kees52  Netherlands
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@simonpink you need to set height to for example 33 cm for a 12 inch woofer, then export.

for a 5 segment tapped horn you need Th1 I think but then you have bad respons as I see. I did use TH1

I do see you use a dayton UM-15, this woofer is not a good candidate, high qts, high vas, low FS beauty
for closed box. Transition from S1 to S2 it is difficult to mount a speaker.

regards
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Last edited by kees52; 19th June 2013 at 06:19 PM.
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Old 19th June 2013, 06:11 PM   #3544
tb46 is offline tb46  United States
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Hi simonpink,

In your example Post #3542: note that it says Height/2 and Width/2 in the column headings. So you get e.g.: 20 x 2 and 4.375 x 2, and that gives you the area in column B of 350.

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Old 20th June 2013, 04:12 AM   #3545
NEO Dan is offline NEO Dan  United States
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Hi Simon,
You might want to start by setting all values in the width column to the desired width of the TH. It's laods easier to build one that way IMO...
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Old 20th June 2013, 09:57 AM   #3546
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I've got it! I was able to bring it into 3D and the calculated volume matched the hornresp sim. Thanks heaps for your help, guys!
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Old 20th June 2013, 05:51 PM   #3547
kees52 is offline kees52  Netherlands
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Hi David

Still I get strange outcomes from hornresp when export conical.

Because of this I don,t trust this because if wrong I possibledo hours
or work for nothing when folding, when I do export exponential then it works
also par and uni works.

everything is in zip also design import.

regards

kees
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Last edited by kees52; 20th June 2013 at 05:53 PM.
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Old 20th June 2013, 06:37 PM   #3548
kees52 is offline kees52  Netherlands
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I have here a sample of the box, look at the flare and tekst.

it is exp, the con one has a lot of other values some 1 cm more flare somewhere around 150 cm from S2 speaker startpoint, therefore I did not trust the conical one, exp seems to fit wel but has bumps in flare on some places, maybe this is because of sketchup...

regards

kees
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Old 22nd June 2013, 07:23 AM   #3549
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Default Hornresp Update 3220-130622

Hi Everyone,

Changes:

1. The problem reported by Kees in Post #3547 has been fixed.

2. A fatal error occurred when trying to print a hard copy of the group delay chart. This problem has now also been fixed - the bug was introduced when the Filter Wizard tool was added.

Kind regards,

David
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Old 22nd June 2013, 07:26 AM   #3550
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Quote:
Originally Posted by kees52 View Post
Still I get strange outcomes from hornresp when export conical.
Hi Kees,

Thanks for reporting this issue. The problem has been fixed in the latest release.

Width / 2 values now remain constant along the length of the horn when the entered S1 and S2 width values are the same. Previously under some circumstances the Width / 2 values could vary.

Note that Height / 2 values can sometimes vary even when the entered S1 and S2 height values are the same. This is because the Con, Exp and Uni flare settings apply to the width, not the height.

Kind regards,

David
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