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Corner Horn Question [message #37827]

Fri, 16 August 2002 08:10

Michaelz
Messages: 25
Registered: May 2009

Chancellor

Hi, everyone:

I am thinking of building some corner conical horns using JBL 2245 drivers I bought from the Tent sale. The horn will consist of the room corner, the sealed back chamber and the driver facing the very point where the back wall, the side wall and the floor join themselves. The box will be a cube with a corner cut off. And the driver will be mounted on that corner. It will have legs to stand on the floor. The space in front of the driver will be the front chamber and the space between the box and walls/floor will be the throat. Of course the size front chamber and the throat can be changed. The ML Util (a utility based on Doctor Marshal Leach's paper on low frequency drivers and bass horn) gives the 4.455 cubic feet for the back chamber, 0.25 cubic foot for the front chamber (these values do not change with horn flair), with requirement to cover 20-150HZ.

I would like to hear what you would think about this project. Pitfalls?

Thanks very much!

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Re: Excuse my English.. [message #37828 is a reply to message #37827]

Fri, 16 August 2002 08:13

Michaelz
Messages: 25
Registered: May 2009

Chancellor

Please allow me to make a correction:

"The box will be a cube with a corner cut off. And the driver will be mounted on that corner." Please read "... the driver will be mounted where the corner was cut off".

Thanks!

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Cornerhorns! [message #37830 is a reply to message #37828]

Fri, 16 August 2002 10:20

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

I really like the π cornerhorn configuration, for lots of reasons. The gain you can expect is 9dB over free-space or 6dB over half-space. The area expansion from the room's corner apex is equivalent to a rectangular straight-walled horn with 70° flare. The corner makes a very large horn, and since the walls are straight, it provides constant directivity for the wavefront. Combine this with matching HF horns and you can generate a very uniform reverberent field. It's a very simple and elegant design, easy to build and great sounding.

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