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 Multi-Way Conventional loudspeakers with crossovers

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Tyimo
diyAudio Member

Join Date: Nov 2002
Location: Hungary

Hi!

I saw the Carfrae Litle-big-horn laudspeaker and the design is fascinated me a lot! So, I would like to try to build a back loaded horn like this, in this style.

I read a very good articel on the Lowther Club of Norway about their's All fun horn. My plan is that I would use theirs calculated reducted size horn. (ca.40Hz)

Has somebody any idea how could I calculate the bend around a circle?

Tyimo
Attached Images
 little-big-horn.jpeg (20.2 KB, 562 views)

 5th April 2005, 08:02 PM #2 purplepeople   diyAudio Member     Join Date: Mar 2003 Location: London, Ontario, Canada http://www.diyaudio.com/forums/showt...933#post280933 This is a simplification of the problem, but it might help. :)ensen. __________________ Those who claim to be making history are often the same ones repeating it.
Tyimo
diyAudio Member

Join Date: Nov 2002
Location: Hungary
Hi Purplepeople!

I attached the horn what I would like to bend ca. 270 grade.
I don't kno how I could calculte the line lenght modification for the
bending?

Tyimo
Attached Images
 expo-horn2.jpg (59.8 KB, 457 views)

mike.e
diyAudio Member

Join Date: Sep 2004
Location: NZ
http://wiki16.parsimony.net/cgi-wiki...gi?wiki27133;1

Quote:
 HornFolding - Microsoft (tm) Excel (tm) spreadsheet by W.H.Geiger HornMath - Collection of formulas, mostly provided by W.H.Geiger

 7th April 2005, 05:46 PM #5 Tyimo   diyAudio Member   Join Date: Nov 2002 Location: Hungary Hi Mike.e! Thanks a lot! Very good site and this is what I meant. Greets: Tyimo
Tyimo
diyAudio Member

Join Date: Nov 2002
Location: Hungary
Hi!

I am trying to ask here also my question:

Could somebody tell me which horn folding method would give better result:

-the factory Fostex enclosure with sharp corners & steps or
-the attached (Isophon) enclosure with smooth curves?

Tyimo
Attached Images
 h510_2.jpg (92.3 KB, 388 views)

GM
diyAudio Member

Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!
Quote:
 Has somebody any idea how could I calculate the bend around a circle?
If you mean the acoustic length then it's SQRT(inside pathlength*outside pathlength).
Quote:
 Could somebody tell me which horn folding method would give better result: -the factory Fostex enclosure with sharp corners & steps or -the attached (Isophon) enclosure with smooth curves? What are the advantages or disadvantages?
Depends on your performance goals. If you don't want much upper harmonics coming from the mouth then you can use sharp corners to limit BW, though some argue that the reflections back to the throat can modulate the driver, but if you make smooth bends then you may have to deal with excessive comb filtering mids BW emanating from the mouth.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

 12th April 2005, 05:07 PM #8 Tyimo   diyAudio Member   Join Date: Nov 2002 Location: Hungary Thanks GM!! Tyimo
Tyimo
diyAudio Member

Join Date: Nov 2002
Location: Hungary
Hi!

I find (only) the picture on the fullrangedriver.com site.
It called Replikon.

Thanks

Tyimo
Attached Images
 replikon.jpg (10.8 KB, 280 views)

 14th April 2005, 07:59 PM #10 planet10   frugal-phile(tm) diyAudio Moderator     Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III There is a manufacturers site somewhere -- i even have a bookmark (which i can't find)... i'm pretty sure i got there off of the FR Forum... dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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