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Old 15th March 2013, 02:29 PM   #3951
kees52 is offline kees52  Netherlands
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Join Date: May 2009
Location: Sprang-capelle Holland.
Quote:
Originally Posted by David McBean View Post
Hi kees,

It is not necessary to use the exported schematic diagram data to construct a bass horn. Simply ensure that the internal cross-sectional areas and axial lengths match those of the Hornresp input parameters.

For your given text file example, this means that:

S1 = 100
S2 = 200
S3 = 800
S4 = 959

L12 =50
L23 = 430
L34 = 50

You will need to use you own judgement when determining the effective lengths of acoustic paths around bends.

Kind regards,

David
Hi David

When use the output I can make nice bends? see the picture post 3848 as example, not the real one afcourse.

If I do S3 800 and S4 959 then it go like on the picture, I need to get S1 to S4 so that it is pure conical otherwise I have a bend in the middle of the speaker, this is the last part I do need to now, the rest I have it.

I think S1 200 S2 800 S3 800 and S4 so That it do not bend, maybe I need to now a rule here from the experienced here. I see that I can make the mouth smaller or the S3 taller to get it a straight line to the mouth.

Sorry about my green ears.

thanks

kees
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File Type: jpg s3-4 flare.jpg (51.6 KB, 212 views)

Last edited by kees52; 15th March 2013 at 02:33 PM.
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Old 15th March 2013, 02:35 PM   #3952
AndrewT is online now AndrewT  Scotland
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Why does the final section need to be conical?
What's wrong with parabolic for all sections?
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Old 15th March 2013, 05:20 PM   #3953
kees52 is offline kees52  Netherlands
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Join Date: May 2009
Location: Sprang-capelle Holland.
Quote:
Originally Posted by AndrewT View Post
Why does the final section need to be conical?
What's wrong with parabolic for all sections?
Hi Andrew

I don,t get how to set it like you all do, one straight line from mouth to throat I did mean all parabolic, I show what I want to see in the picture below.

I have now uses only measurement of S1 S2 S3 S4 like David say, the picture in the post before S3 and S4 did bend, and how it looks now I do need for easy workout the box.

picture horn, and response of the infinity 1260W etc like it is now with straight angle and not as last post this is what I want but what is the best way, that is what I did mean so Andrew there is nothing wrong with parabolic but I need no bend in the middle of the speaker...

What I also not get 100 % is how I do fill in extra volume in hornresp for braces and such, like the driver volume, do I make the S3 and S4 bigger ? for example if bracing is 10 liters in the long part I do make S3 10 liter bigger, this are the last parts, If I now them then I have remove my greenery behindthe ears I hope.

Thanks all for the help, and some input about the design I do like also and maybe some extra info..
Attached Images
File Type: jpg respons.jpg (49.3 KB, 206 views)
File Type: jpg ScreenHunter_04 Mar. 15 17.13.jpg (49.6 KB, 202 views)
File Type: jpg ScreenHunter_05 Mar. 15 17.13.jpg (27.8 KB, 194 views)
File Type: jpg ScreenHunter_06 Mar. 15 17.13.jpg (66.9 KB, 197 views)
File Type: jpg ScreenHunter_07 Mar. 15 17.14.jpg (36.7 KB, 30 views)
File Type: jpg mal-tappedhorn.jpg (40.0 KB, 34 views)

Last edited by kees52; 15th March 2013 at 05:49 PM.
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Old 16th March 2013, 01:11 PM   #3954
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Quote:
Originally Posted by kees52 View Post
for example if bracing is 10 liters in the long part I do make S3 10 liter bigger
Hi kees,

S3 is a cross-sectional area, not a volume.

To remain consistent with the simulated design, the value of S3 should not be changed.

Kind regards,

David
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Old 16th March 2013, 01:59 PM   #3955
kees52 is offline kees52  Netherlands
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Hi David

Yes I do now but how do people implement the braces and the speaker itslefs? when I put that in the hornresp design your cros-sectional area change, the only way I see it when there is a 18 mm brace I have to extra widen the box to get the same area again, or do I see this wrong? I can tread the braces also as a cross sectional area, better I need to do that and fill in that extra space in hornresp, some do 20-30 procent extra to the outcome of hornresp.

Do you like the graph in the post 3953? I now did only measure s1 s2 s3 s4 and drawn a straight line like you say, I think with a notch or damping I get to 100 Hz bandwith with some loss of efficienty.

I go try to find some more info, the tapped horn treads are sometimes very very big, special if i am there:-)

Last edited by kees52; 16th March 2013 at 02:04 PM.
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Old 17th March 2013, 09:21 AM   #3956
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Hi kees,

Quote:
Originally Posted by kees52 View Post
the only way I see it when there is a 18 mm brace I have to extra widen the box to get the same area again
That is the correct approach to take.

Quote:
Originally Posted by kees52 View Post
Do you like the graph in the post 3953?
The SPL response curve from 20-70Hz looks fine to me :-).

Kind regards,

David
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Last edited by David McBean; 17th March 2013 at 09:23 AM.
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Old 17th March 2013, 03:32 PM   #3957
kees52 is offline kees52  Netherlands
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Hi David, Thanks for your help, now I now what to do and how, the LE in your program
do this also include the coil for the crossover? do I need also include resistance of that coil in the speaker RE in hornresp?

And that is all I need to now, nog learn folding what is more difficult if I use longer L12.

regards and thanks again learn me using your wonderfull software.

kees
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Old 17th March 2013, 10:09 PM   #3958
kees52 is offline kees52  Netherlands
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Faulty respons, sorry

Last edited by kees52; 17th March 2013 at 10:35 PM.
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Old 17th March 2013, 10:13 PM   #3959
kees52 is offline kees52  Netherlands
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Ahh I did not now everything, One thing resists.

The outcome see pictures, here I have a strange outcome but a very good graph, The question is precisely on the center of S2 or S3 where the speaker is I can not assemble the speaker because there is a angle there, what do you in such case put the speaker on the back of the horn? so it will fitt on that angle, I hope you understand what I mean, my english in technical form is not as good.

This grahp from hornresp is from two speakers, I can put them like it is in TH-Spud tapper horn, but this is nog a real tapped horn, more a combination of a tapped horn and a T-TQWT, the question here is about one speaker, if there is a bend on S3 or S2.

see exort sketchup the circle on S2 this box is just a testing for me, I even have not that mivoc speaker.

Have a nice weekend.

kees
Attached Images
File Type: jpg Mivoc-aw3000.jpg (86.8 KB, 39 views)
File Type: jpg ScreenHunter_06 Mar. 17 22.01.jpg (31.6 KB, 36 views)
File Type: jpg ScreenHunter_04 Mar. 17 22.01.jpg (50.4 KB, 37 views)
File Type: jpg ScreenHunter_05 Mar. 17 22.01.jpg (63.1 KB, 35 views)

Last edited by kees52; 17th March 2013 at 10:18 PM.
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Old 18th March 2013, 07:07 AM   #3960
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Hi kees,

Someone with practical experience in constructing tapped horns would be in a better position than me to answer your latest questions.

Kind regards,

David
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