Back Loaded Horn Bending

Tyimo · 5th April 2005, 04:50 PM

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

purplepeople · 5th April 2005, 08:02 PM

http://www.diyaudio.com/forums/showt...933#post280933

This is a simplification of the problem, but it might help.

:)ensen.

Tyimo · 6th April 2005, 04:59 PM

Hi Purplepeople!

Thanks! I will read it.

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

mike.e · 7th April 2005, 01:09 AM

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

Tyimo · 7th April 2005, 05:46 PM

Hi Mike.e!

Thanks a lot! Very good site and this is what I meant.

Greets:

Tyimo

Tyimo · 11th April 2005, 05:13 PM

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?

What are the advantages or disadvantages?

Tyimo

GM · 12th April 2005, 01:51 AM

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

Tyimo · 12th April 2005, 05:07 PM

Thanks GM!!

Tyimo

Tyimo · 14th April 2005, 05:21 PM

Hi!

Has somebody any information about this fascinating BLH enclosure?
I find (only) the picture on the fullrangedriver.com site.
It called Replikon.

Thanks

Tyimo

planet10 · 14th April 2005, 07:59 PM

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

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.

14th April 2005, 07:59 PM	#10
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	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 ........ commercial site planet10-HiFi p10-hifi forum here at diyA

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Using PVC Pipe For A Back Loaded Horn	JimOfOakCreek	Full Range	13	15th April 2008 07:30 PM
Back loaded horn bipoles? What? Why?	kaltsoplyn	Full Range	6	19th February 2008 11:37 PM
Front loaded and back loaded horn	DrWoofer.com	Subwoofers	0	3rd August 2007 06:55 PM
Back Loaded Horn Calculations	Tyimo	Multi-Way	3	15th March 2005 03:34 PM
Would like details of this Back Loaded Horn	mrlots2do	Multi-Way	7	16th January 2005 02:54 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

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

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

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)