Collaborative Tapped horn project - Page 397 - diyAudio
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Old 18th March 2013, 12:12 PM   #3961
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by David McBean View Post
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
Hi David

Yes that was the plan, I was curieus about this outcome, I think that I have to do myself the folding and so I was start learning sketchup, if there is a other drwan software that is better let me now, this is a ask on the diy,ers not david he have provide me with enough info about hornresp.

some ideas about what I did here with the mivoc I do also like.

regards

I awaiting thanks.
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Old 18th March 2013, 08:17 PM   #3962
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by kees52 View Post
...some ideas about what I did here with the mivoc I do also like...
Hi Kees,

First, At the HR input screen: The picture in Post 3959 show a few mistakes:
You’ve added a loss-less inductor to Le, i.e. to a design that is very sensitive to loss in serie components. Further: The Eg value is set to 20 V = a too high value as x-max(6.3mm) is exceeded (~11 mm at 28 Hz).
You should rely on HR's TS consistency-check when entering numbers..Looks like your numbers are a bit off.

When it comes to your enclosure layout problem: I recommend you to consider a different design:
See the submitted picture..

b
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File Type: jpg Mivoc-AW3000.jpg (846.8 KB, 275 views)
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Old 18th March 2013, 09:01 PM   #3963
kees52 is offline kees52  Netherlands
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Hi Bjorno

Hi Bjorno

You have use the MAROC design what I have done as a kind of time consumer, I did want nog how strange it is, but further I do nothing with it, do you have use the the same w3000 as I did? you are more succesfull with the T-TQWT

Here is the one I do want to build, it is a tapped horn because this woofer did not well in T-TQWT otherwise I dod go there it looks better and the peak go away with damping let more bandwidth, less sensitivity of a T-TQWT is not a problem in a home.

Do I add the RE and Le to the already excisting speaker value? Yes I have a question left haha, S1 ts straight S2 begin bending, what if the speaker are precisely on that bend, it wil be good, do people then turn over the pipe installing the speaker on the backside keep in mind this when folding?

Thanks for all your help, I be almost be full learned about it.

see pictures about what I already did en will test, my visatons do work fine in a T-TQWT.

regards

kees
Quote:
Originally Posted by bjorno View Post
Hi Kees,

First, At the HR input screen: The picture in Post 3959 show a few mistakes:
You’ve added a loss-less inductor to Le, i.e. to a design that is very sensitive to loss in serie components. Further: The Eg value is set to 20 V = a too high value as x-max(6.3mm) is exceeded (~11 mm at 28 Hz).
You should rely on HR's TS consistency-check when entering numbers..Looks like your numbers are a bit off.

When it comes to your enclosure layout problem: I recommend you to consider a different design:
See the submitted picture..

b
Attached Images
File Type: jpg infinity-w1260.jpg (50.3 KB, 167 views)
File Type: jpg ScreenHunter_02 Mar. 18 22.24.jpg (61.9 KB, 156 views)
File Type: jpg ScreenHunter_03 Mar. 18 22.25.jpg (29.6 KB, 154 views)
Attached Files
File Type: pdf REF1260W_PI_EN.pdf (130.9 KB, 13 views)

Last edited by kees52; 18th March 2013 at 09:27 PM.
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Old 19th March 2013, 02:03 AM   #3964
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You are modeling at 0.5pi. Bjorno is modeling at 2.0pi. Look at bjorno's models at 0.5pi and compare them to your model.
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Old 19th March 2013, 12:00 PM   #3965
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by BP1Fanatic View Post
You are modeling at 0.5pi. Bjorno is modeling at 2.0pi. Look at bjorno's models at 0.5pi and compare them to your model.
Here we go, but still don,t now how to act as the troat S1 is even square and S2 start to have angle, now I can not install a speaker because hornresp go from center of the speaker as I now, but in schematic it looks that the bend start on the egde of the speaker, do I explane oke?

I have now simulated on 2.0 pi see pictures
Attached Images
File Type: jpg ScreenHunter_01 Mar. 19 12.54.jpg (51.2 KB, 138 views)
File Type: jpg ScreenHunter_02 Mar. 19 12.55.jpg (65.4 KB, 26 views)
File Type: jpg ScreenHunter_03 Mar. 19 12.56.jpg (32.3 KB, 23 views)
File Type: jpg mal-tappedhorn.jpg (58.4 KB, 25 views)

Last edited by kees52; 19th March 2013 at 12:12 PM.
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Old 19th March 2013, 02:11 PM   #3966
kees52 is offline kees52  Netherlands
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Well I see I can cancel my tapped horn, it will not work with a passive filter as I have seen on some threads, I have hybrides and had plans for use of a 24dB or 18dB passive crossover, I use trafo so I have with 14mH inducion 0.81 ohm resistance, plus 0.6 for the second coil, do eventually a T-TQWT work with a passive filter and how do I fill in the coils, both Re and Le of filter multiplied with the driver induction and resistance?

For as hornresp, speaker coils is parallell with ohms of speaker and coils from crossover is
in serial, also the crossover coils have caps to null and so I don,t now if coil has to be all included.

Some explaning I do like, thanks for all the help.

kees
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Old 19th March 2013, 03:58 PM   #3967
kees52 is offline kees52  Netherlands
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I am started the advise of Bjorno.

Go to T_TQWT, and so maybe I have to remove then also to a T_TQWT thread?

I did see and test with hornresp that a T-TQWT is more forgiven about the crossover when passive, I deed then minimal 18 dB crossover.

here a the tests, box is also a lot smaller but efficienty is lower 91 dB in stead of 98 dB I think with damping it go wider bandwith.

Bjorno, I have also the sheets from martin, what did you use for simulation tqwt a TL sheet?

thanks all here for the help.
Attached Images
File Type: jpg ScreenHunter_07 Mar. 19 16.35.jpg (66.5 KB, 22 views)
File Type: jpg ScreenHunter_08 Mar. 19 16.36.jpg (31.7 KB, 15 views)
File Type: jpg ScreenHunter_09 Mar. 19 16.38.jpg (53.2 KB, 19 views)

Last edited by kees52; 19th March 2013 at 04:01 PM.
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Old 19th March 2013, 06:56 PM   #3968
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Quote:
Originally Posted by kees52 View Post
Here we go, but still don,t now how to act as the troat S1 is even square and S2 start to have angle, now I can not install a speaker because hornresp go from center of the speaker as I now, but in schematic it looks that the bend start on the egde of the speaker, do I explane oke?

I have now simulated on 2.0 pi see pictures
You are using 2.83v/1w for an 8ohm speaker instead of using 2.00v/1w for a 4ohm speaker. Here's a 349 liter, 17 foot long TH that can handle 250 watts at 13mm xmax. Box = 53.25"H x 17.5"W x 31.75"L using 0.75", 19.05mm, 1.905cm stock. The thickness of wood is factored in with Vtc & Atc.
Attached Images
File Type: jpg TH 2.jpg (58.2 KB, 30 views)
File Type: jpg TH 3.JPG (34.5 KB, 29 views)
File Type: jpg TH 4.JPG (53.8 KB, 16 views)
File Type: jpg TH 5.jpg (59.5 KB, 19 views)
File Type: jpg TH 1.jpg (67.9 KB, 25 views)

Last edited by BP1Fanatic; 19th March 2013 at 07:03 PM.
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Old 19th March 2013, 07:08 PM   #3969
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by BP1Fanatic View Post
You are using 2.83v/1w for an 8ohm speaker instead of using 2.00v/1w for a 4ohm speaker. Here's a 349 liter, 17 foot long TH that can handle 250 watts at 13mm xmax. Box = 53.25"H x 17.5"W x 31.75"L using 0.75", 19.05mm, 1.905cm stock. The thickness of wood is factored in with Vtc & Atc.
Thanks for thinking, I presume that input voltage for 4 or 8 ohm is not as important for me, give onlysome more or les spl, it wil go loud enough.

Buttt a tapped horn wil not work with a normal passive crossover and I do use that because I have no extra bass amp, this I do wil make some day but not now, a T-TQWT is then a better option, less sensitive for coils and resistance.

I think however that hornresp simulate not accurate with a serie coil? because the speaker induction is paralell with ohmic resistance.

thanks again for your sims.

kees
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Old 20th March 2013, 04:03 PM   #3970
kees52 is offline kees52  Netherlands
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Well my again have some test done with T-TQWT,s, I send back the infinity if not suitable, I did see the mtx is better.

Please let your eyes glide in it and maybe some has a idea about the passive filtering, wot to implement that in hornresp, for example a 18dB octave one, need I to include al the coils or only the one after the capacitor because the first coil has cap to ground.

thanks al and have a nice day/night.
Attached Images
File Type: jpg MTX audio rt12-04-1.jpg (50.8 KB, 26 views)
File Type: jpg MTX audio rt12-04-2.jpg (67.2 KB, 22 views)
File Type: jpg MTX audio rt12-04-3.jpg (47.0 KB, 15 views)
File Type: jpg MTX audio rt12-04-4.jpg (65.3 KB, 7 views)
File Type: jpg MTX audio rt12-04-5.jpg (43.2 KB, 10 views)
File Type: jpg INFINITY1260W-1.jpg (55.4 KB, 15 views)
File Type: jpg INFINITY1260W-2.jpg (58.5 KB, 17 views)
File Type: jpg INFINITY1260W-5.jpg (53.0 KB, 12 views)
File Type: jpg INFINITY1260W-4.jpg (69.4 KB, 7 views)
File Type: jpg INFINITY1260W-3.jpg (48.9 KB, 7 views)

Last edited by kees52; 20th March 2013 at 04:28 PM.
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