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04-15-2013 Post does not mapped to Knowledge Tree
Wojtek
Pinckney (MI), United States
Posts 158
Joined on 09-01-2005

Post #: 1
Post ID: 19223
Reply to: 19223
Another horn manufacturer
fiogf49gjkf0d
I can recommend Attila from Hungary ; fast , professional and reasonable . He advertises on AA classifieds :

 http://www.audioasylumtrader.com/ca/listing/Speakers-Horns-Parts-Stands/Manufacture/tractrix-le-cleac-39-h-spherical...../Wooden-horns-until-110-cm-diameter/80890

Rgrds, W


04-16-2013 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-27-2004

Post #: 2
Post ID: 19238
Reply to: 19223
What king horns do audio people need?
fiogf49gjkf0d
Attila from Hungary send me emails telling that he got CNC lathe, carver and the rest of gear and that he is very much willing to make horns.  He asked: “I would like to ask your opinion, what type of horns people most need”. I find it is interesting question.  The guy wants to optimize his operation and would like to research what is the most demanding type of horns. Sound very reasonable and I would like to run this subject at my site.

So, if you start your own horn making operation and have option to make any profiles and types then what products would you offer to public?

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
04-16-2013 Post does not mapped to Knowledge Tree
zztop7
Edmonds, WA
Posts 40
Joined on 11-02-2012

Post #: 3
Post ID: 19240
Reply to: 19238
Product to the Public
fiogf49gjkf0d
Public - now that is broad.   The Public wants easy; not perfect.   I would offer a simple two way: 12" paper cones LF with first order low pass [not a horn].   Iwata or Yuichi  radial hyperbolic [MF & HF] horn above with first order medium-high pass. 

http://www.geocities.jp/arai401204/Horn/A290S/A290-S90.html

Best to all,   zz.
04-17-2013 Post does not mapped to Knowledge Tree
tuga


Posts 174
Joined on 12-26-2007

Post #: 4
Post ID: 19248
Reply to: 19238
Eliptical profile.
fiogf49gjkf0d
I would definitely produce either Le Cleac'h or Tractrix eliptical profiles as these are far more domestic friendly, especially in Europe were rooms are rather small and ceilings low.
And perhaps a half-circular (80/150Hz) for the same as well as cost reasons...


Cheers,
R


"Science draws the wave, poetry fills it with water" Teixeira Pascoaes
04-18-2013 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-27-2004

Post #: 5
Post ID: 19262
Reply to: 19248
Some of my ideas.
fiogf49gjkf0d
This is an interesting metal exercise – what would be the most beneficial for audio public and what would be “signaturial” for a manufacturer. Since the company do not turn the horn as most of the people do but use CNC machine then it would be very interesting if they design a product that would be not individual horns but a horn assembly. I would like to see the Macondo-like assembly of elliptical Tractrix 3-4 horns, organized by very intelligent frame. No drivers, no high price, juts very flexible and intelligent horn origination.  The removable back plates that would accommodate any drivers: from 1” to 2” let say. The subject of upperbass horn is very interesting. The 110 cm maximal diameter is fine but it would be interesting if it possible to get more by “smart” design. Let pretend that we has a stock of 4 horns in Macondo configuration (nothing else works). So the topmost horn is elliptical and almost circular. The next horn is eliptical but in slightly squarish shape. The next horn is still eliptical but even with more squarish edges. The last uppers horn is almost rectangular, let say 80Hz but it still has some curvature and elipticness. If all of it gradually organized in a very elegant assembly and supplemented with a frame that can care everything in time-align fission then it might be very interesting.

I would say that a set of 3-4 unfinished horns might be sold for $5K-$7K, juts to keep the price intentionally low. The reality is that with CNC programmed to make such of assembly is very easy and would cost very low. If such of kit would be properly designed I would very much endorse it, but it must be properly designed and made.

Rgs, The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
04-18-2013 Post does not mapped to Knowledge Tree
zztop7
Edmonds, WA
Posts 40
Joined on 11-02-2012

Post #: 6
Post ID: 19265
Reply to: 19262
Reply to the Cat
fiogf49gjkf0d
I think that $5K-$7K might be adequate for the project if no profit was involved.  Different path: CNC for the mold, but fiberglass boat style construction - gel coat, chopped fiberglass, dense closed cell spray in foam for structural strength, final coat of glass etc. /  or use carbon fiber instead of fiberglass.  The carbon fiber would not have to be a layup.  Newer Lamborghinis & Callaway golf clubs are using an easier system developed at the University of Washington.   This production would not have the typical exterior horn appearance; it would be an exterior block appearance.  The interior horn layout would be as you the Cat described.Best to you,zz.
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