Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Easy horn, quadrant horn?
Easy horn, quadrant horn?
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
Reply
 
Thread Tools Search this Thread
Old 29th January 2012, 08:44 AM   #1
Hentai is offline Hentai  Japan
diyAudio Member
 
Join Date: Nov 2006
Default Easy horn, quadrant horn?

Hello,

It's been some time since i've been thinking of a horn contour thats very easy to build with handheld tools besides conicals.
So it came to mind the arc that describes a quadrant of a circle. In the picture below it would be the green part:

Easy horn, quadrant horn?-2dsfdxd-gif

The circles have their centers on the same plane with the hornís
throat so x coordinate of the center will always be 0.
In practice it can differ as other segments can be added between the throat and the driver to provide a better match between the driver and horn.
Using a hand operated router its very easy to make the contour since its part of a circle.

In the drawing we have Rt - Throat Radius, Rc- Radius of the circle, this is the radius you will need to set for your router and it will also be the length of the horn, Rm - Mouth Radius.

The equation to determine the diameter of an axisymmetric horn is:
y(x)=2*[(Rc+Rt)-sqrt(Rc^2-x^2)], with x=[0,..,Rc]

From here its easy to determine S(x). I could use help with the wave equation, i got it up to a point but im stuck.

Attached there is a excel sheet that will generate AxiDriver baffle input numbers in 5mm steps and Akabak script lines with conical sections of 5mm length.
The akabak scripting will require some adjustments.
Below are axidriver simulations for mouth diameters ranging from 10cm to 35cm with 1cm increment. 25mm throat.

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?
Attached Images
File Type: gif 2dsfdxd.gif (9.4 KB, 123 views)
Attached Files
File Type: zip quadrant horn spreadsheet.zip (459.3 KB, 21 views)
  Reply With Quote
Old 29th January 2012, 08:48 AM   #2
Hentai is offline Hentai  Japan
diyAudio Member
 
Join Date: Nov 2006
Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?

Easy horn, quadrant horn?
  Reply With Quote
Old 29th January 2012, 08:50 AM   #3
Hentai is offline Hentai  Japan
diyAudio Member
 
Join Date: Nov 2006
looking forward to your opinnion.

Soon i will build one and measure it.
  Reply With Quote

Reply


Easy horn, quadrant horn?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Easy Horn Excel Spreadsheet soho54 Subwoofers 57 9th June 2016 03:20 PM
easy exponential horn speakers anyone? 12345chris Full Range 9 21st March 2012 11:32 AM
Something a little different: quick-and-easy iPod Horn chris661 Full Range 37 16th January 2012 09:53 AM
An easy to build classic horn? dabbler Multi-Way 22 1st September 2011 08:01 AM
easy-to-build 3D-folded horn el`Ol Multi-Way 0 24th January 2009 09:57 AM


New To Site? Need Help?

All times are GMT. The time now is 02:08 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki