High Efficiency Speaker Asylum

how to make spherical ( tractrix ) wood horns, step by step

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angeloitacare

here you can learn how to make spherical wooden horns, explained step by step ( thanks for John Haskin for his precious informations ) :
http://www.flickr.com/photos/7808268@N07/
if you decide to make a pair, i can email you corel graph's for tractrix horns with 88cm diameter ( 150hz ) and 58cm ( 250hz ) horns.
John Hasquin does not recommend to make them bigger than with 88cm diameter :
" I would advise you not to make a horn any bigger than 88cm mouth. The 95cm mouth horn is too big and you will not be able to get good high frequency out of it. A 95cm mouth horn with 10cm throat will be about 92cm deep. For a horn that is between 80cm to 73cm deep, you will need a very efficient speaker like the Fane Studio 8M or the Ciare 8.5 Nd MR " .
If you do not have a lathe, you can use a file, and make them manually, as explained at vincent.brient site: http://vincent.brient.free.fr/pav_ronds.htm
angelo

Edits: 05/28/07

Follow Ups:

RE: how to make spherical ( tractrix ) wood horns, step by step - limono 20:01:58 05/28/07 (2)
Nice website !Thanks for sharing .Since John is rarely seen here what was the predicted response of 95cm horn? I'd li8ke to build 80-100 Hz round tractrix .It doesn't have to go high-600-800 Hz is Ok as I already have 200 Hz mid -range horn.Regards, L
- RE: how to make spherical ( tractrix ) wood horns, step by step - angeloitacare 20:14:05 05/28/07 (1)
  hi L
  you can check this website.
  http://petoindominique.fr/php/pav.php
  it is in french, but it has a lot of information.
  i have data only for 88cm diameter horn, wich i am building.
  
  Edits: 05/28/07
  - English - RCA-fan 07:12:53 05/29/07 (0)
    http://translate.google.com/translate?hl=en&sl=fr&u=http://www.petoindominique.com/&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Dpetoindominique%26hl%3Den%26client%3Dfirefox-a%26channel%3Ds%26rls%3Dorg.mozilla:en-US:official%26hs%3DAhM%26sa%3DG

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