Don Keele

[Rick Craig]

Here's a link to the papers of Don Keele, one of the best engineers in the speaker industry. Lots of good stuff here http://www.xlrtechs.com/dbkeele.com/papers.htm

[Carl V]

Thanks for the link Rick. Yeah, remember back in the day when AUDIO magazine had a bevy of well educated & talented people on staff.


Your SSR's have been very nice out of doors lately....it's amazing how they sound when you tak ethe room out of the equation.

[jdybnis]

His recent papers on constant beamwidth transducers are an interesting twist on line arrays.

[Rick Craig]

His recent papers on constant beamwidth transducers are an interesting twist on line arrays.

I agree; in fact, I'm privileged to be part of a project building a CBT array for my church.

[jdybnis]

How are you handling lobing? He doesn't really discuss it in his papers. What does the polar response look like in the crossover region?

[chrismercurio]

Line Sources

Although I have heard a few impressive ones....how do you get around comb filtering and destructive interference? I ask because Rick builds some nice ones.

Thanks in advance,

C

[Rick Craig]

How are you handling lobing? He doesn't really discuss it in his papers. What does the polar response look like in the crossover region?

Actually I'm not the designer but a friend who used to work with Mr. Linkwitz.

[Rick Craig]

Although I have heard a few impressive ones....how do you get around comb filtering and destructive interference? I ask because Rick builds some nice ones.

Thanks in advance,

C

It's really a matter of driver spacing and crossover points.

[Gir]

It's really a matter of driver spacing and crossover points.

Could you elaborate? Or are we getting into some real heavy theory here...

[Rick Craig]

Could you elaborate? Or are we getting into some real heavy theory here...

If you read Jim Griffin's paper that will give you a good start.