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+--- Thread: Custom made horns and waveguides (/showthread.php?tid=8849)
Custom made horns and waveguides - jzagaja - 9. 10. 2009
Together with Autotech.pl we have made first mold for 400Hz, 1", JMLC, 14 deg throat horn with large mouth radius. It is made of 2-3mm polyester resin, white, green or blue and yellow on Spring 2010. We can make any arbitrary horn or waveguide up to 98cm diameter.
Contact information:
Mr. Lukas Lewandowski
+48 602-647-173 (handy, Englisch)
+48 602-106-005 (mobil, Deutsch)
info@autotech.pl
Picture:
http://img225.imageshack.us/i/img3246n.jpg/
Custom made horns and waveguides - MaBat - 9. 10. 2009
Encounters of the Third Kind
Good luck with your endeavour. What about an 12-15" Oblate Spheroid?
Custom made horns and waveguides - jzagaja - 9. 10. 2009
We are working on CD horn which look and work like OS without violate the patent. Best would be a group buy. Suggested driver Tangband W3-1797S.
Custom made horns and waveguides - MaBat - 9. 10. 2009
Thanks. I thought the patent is only for the foam insert, not the shape... Isn't 3" too big? (Never mind, just thinking aloud...)
It all depends on the price I'm afraid (not too many fans of waveguides here either to make it a bit lower). Personally I'd be interested in CD horn (90 deg) with 1" throat (6 deg possibly) and 12-15" mouth diameter but surely I'm just a small fish for you. Depends on the cost, however.
It just needs time, maybe some more will catch...
Custom made horns and waveguides - jzagaja - 9. 10. 2009
12-15" OS waveguide is about the size of above JMLC horn which cost 370PLN, ca. 2240 CZK. Is it ok?
Custom made horns and waveguides - MaBat - 9. 10. 2009
That would be fabulous! I'll contact you soon...
Custom made horns and waveguides - jzagaja - 9. 10. 2009
Price is for one horn. It isn't cheap because of large mouth radius (double mold).
Custom made horns and waveguides - MaBat - 9. 10. 2009
Sure, I see. It's a fair price, I think. I would just love to see some drawing of the whole thing - later on (and hoping it is rigid enough).
Custom made horns and waveguides - jzagaja - 9. 10. 2009
Anyone here tried horn FEM/BEM simulations? For example if you use balanced mode radiator you can choose radiation pattern according to your needs through waveguides.
MaBat - you can provide Excel spreadsheet or points coordinates or leave this part on me. I think it won't resonate but I have to check because it's a first batch. Flange is usually made of 18mm MDF. For very special order we can think about painting and use special lacquers from Mankiewicz.de: softcoatings, Nextels found in luxury cars and yachts.
Custom made horns and waveguides - MaBat - 9. 10. 2009
OK, I can do that (the coordinates)...
Citace:I think it won't resonate but I have to check because it's a first batch.Even if it was not dead enough alone it would be always possible to add some MDF/wood support - it would be hidden inside the enclosure, so who cares... I hope it won't be nessesary anyway.
I'm sure some more people will be interested also, so I'd give it a few days. We'll see. Nice offer so far, thank you
Much appreciated indeed.
Custom made horns and waveguides - jzagaja - 9. 10. 2009
I took 3 days by one man to produce this horn.
Custom made horns and waveguides - MaBat - 10. 10. 2009
So theoretically would it be possible to produce something like this?
![[Image: 148_oswg.jpg]](http://s4.postimg.cc/6w6cd38l5/148_oswg.jpg)
The dimensions are in cm - just the profile (finally I would make it probably a little bit smaller).
Custom made horns and waveguides - MethMan - 10. 10. 2009
Personally, I'm interested in exact OS with 13-15 inch mouth and 1" throat as I see no reason for using any other profile or mods.
Custom made horns and waveguides - MaBat - 10. 10. 2009
This is exactly what it is (the throat would only have 6,5deg angle to match the B&C drivers more closely). But you allways have to roundover the mouth to the baffle somehow - it just should be smooth enough. Then it may be dufficult to tell exactly what the (effective) mouth size is..
We should make a desicion - the more pieces, the better
MethMan, you would make it even bigger than on the picture? The enclousure would be HUGE (50cm width minimum) - I know the bigger the better....
Custom made horns and waveguides - MethMan - 10. 10. 2009
Nekoukal jsem na tvůj obrázek předtím. Průměr 35 je pro mě ideální, víc mi přijde zbytečný. 6,5 stupně máš na každou stranu nebo celkem? IIRC je to celkem. Další věc je, že výrobek ti musí umožnit přesné dopasování, takže musí začít "dřív".
Custom made horns and waveguides - MaBat - 10. 10. 2009
Myslel jsem, že je to na jednu stranu - ještě jsem po tom nepátral, to by nám řekli Italové. Udělal bych to tak, že se to nechá vyrobit pro malinko menší průměr hrdla tak, aby vyšel požadovaný úhel při tom 1" - pak by se z výrobku odbrousil asi 1mm. Nebo máš lepší řešení?
Co neni zatím vyřešený, je nějaký uchycení pro driver. Tím se to komplikuje, protože to půjde blbě dohromady. Oni asi umí jen ten samotnej profil, bez větších objemů, jak jsem to pochopil (pak by se to dalo odlít i s tím), tj. musely bychom si ho pak udělat sami, ev. to nechat vyrobit od nich už "přesné".
jzagaja: Nothing important...
Custom made horns and waveguides - MethMan - 10. 10. 2009
Nemám, jen bych volil klidně centimetr. Změna profilu na 1mm je asi menší než bude výrobní odchylka. Uchycení driveru jako neřešitelný problém nevidím, ale bude to trochu jebačka. Nedostaneme z toho stoprocentní řešení, ale i 80 je dobrých.
jzaga: still nothing important ...
Custom made horns and waveguides - junglist - 10. 10. 2009
Kluci, co to chystáte?
Custom made horns and waveguides - MaBat - 10. 10. 2009
Konečně něco, za co má smysl utratit prachy (pokud všechno dobře půjde)...
Custom made horns and waveguides - junglist - 10. 10. 2009
Já věřím, že vám to ten polák vyrobí ;-) Takže palcovej drajvr B&C se zvukovodem a co bys viděl pod tím?