MikeMilliken Posted February 26, 2009 Share Posted February 26, 2009 Can someone please direct me to a good book/books on theory. The most current research would be appreciated! Specifically, I got to figure out whats going on at the point of driver coupling to the horn. What needs to be happening there, mostly. Thanks guys! Quote Link to comment Share on other sites More sharing options...
Don Richard Posted February 26, 2009 Share Posted February 26, 2009 Much of the information on horn design is written for engineers, with loads of college-level math. The internet has some easier-to-understand info: http://ldsg.snippets.org/HORNS/design.html http://www.volvotreter.de/dl-section.htm http://www.quarter-wave.com/ http://diyaudioprojects.com/Technical/Papers/Horn-Loudspeaker-Design-Part-1.pdf Here is a link to David McBean's free Hornresponse design program: http://mywebsite.bigpond.com/dmcbean/ This should get you started and keep you busy for a while. Good luck! Quote Link to comment Share on other sites More sharing options...
WMcD Posted February 28, 2009 Share Posted February 28, 2009 I've posted most of the important literature. The most important concept is that we want the driver to be forcing air in and out of tube to make it an effective pump. But then we want the tube to have a big other end to couple to free air. That is a horn. The small end is the throat and the big end is the mouth. The throat must present the proper acoustic load to the driver. The throat impedance is established my the amount of area at the throat. Generally the idea is to figure out the acoustic impedance of the driver and make it a match. That can be figured from the TS parameters. As far as geometry . . . in bass horns we generally fold the horn. With the folding we may have two paths too. Often this means the horn structure makes a 90 degree turn just in front of the driver. The theory is that here, near the driver, there is so much pressure that the wave (such as it is) has no problem making the turn. In the K-Horn, Belle, and LS you'll notice that there is what I call a restrictor plate where the opening is 3 x 13, whereas the rest of throat has a total area established by 6 x 13. In my view, that is an effort by PWK to define a chamber in front of the driver. There is a reason for this. In my view, the chamber helps form a resonance between the driver diaphragm mass and the chamber to increase the output above 300 Hz. This is not used in the Jubilee. In the Klipsch bifurcated horns there is a little prism just at the throat. That, I think, is just to maintain area rather than being a reflector. Wm McD Quote Link to comment Share on other sites More sharing options...
BigStewMan Posted February 28, 2009 Share Posted February 28, 2009 You're lucky! My Mom always told me "No Horns until your homework is done." Quote Link to comment Share on other sites More sharing options...
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