Horns, Physical attributes as related to sound

I am curious about how the size and math affect the actual response of the horn. Does that make sense? I have no input as of yet but thought it may be a good topic for others to learn from.

Here is a pic of a midbass/midrange horn that I slapped together. I followed the info found here: http://www.audioroundtable.com/PiSp...ages/14407.html. I first tried a 12 full range Utah driver I had laying around with surprising results. I immediately wanted to hear two of them so I slapped another together. Not having two 12 or 10 inch drivers that matched my dad remembered that he had some 6 1/2 inch coaxial car speakers, so we tried them. Now the original info said a 10" Emminence Delta woofer would produce a useable 200Hz to 2000Hz. I found that the car speakers easily played that low and because of the coaxial tweeter played much higher. I think as long as the speakers used is capable of those frequencies that this horn will work very well. I am curious to get home and make a set for myself and test them with a db meter and tone generator. We also tried filling in the bottom end with a small HT sub with a variable crossover(100HZ) and modest power with very good results as well. Enough enjoyment was derived for me to start to plan better construction and parts selections. I will try different shapes (not just straight sides) for the horn to see how it effects the frequency response/ouput. Keep watching as I will continue to post my findings and results.

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Cool project, keep it coming.

Wish I could add something constructive here, but I'm pretty much clueless regarding horns. I do remember some discussion about horn size and issues in this Magico Ultimate review. It might not contain anything more than you already know, but plenty of eye candy.

- JP

Here is a good primer on horns by no means a comprehensive look.
There are many things that effect what you hear and usually the horn dictates the quality of sound,not the compression driver as you would think.
Greg
http://aa.peavey.com/downloads/pdf/qwp1.pdf

To expand on this subject the bigger the horn the lower its cutoff point and I believe the lowest a horn can go is 30hz.Something to do with phisics.
Greg

Can you do that out of metal?I ask because I noticed in your avatar something about metal manipulation.Sounds like a fun project!
Greg

Did someone say HORNS? Ahh HORNS! I know I did not add any good info but I do love HORNS!

Right Greg?

AH!..10-4

Horns and TUBES...oh yea!

Greg

I'm with charlieboy. I just love horns and tubes.

Steamer, to be a bit arrogant, yes I can make them from metal. If it's metal I can work it into something usable. Usually just and ash tray but certainly usable. I just ordered a couple of 48x96 sheets of 16ga plate steel to make some horns. I'm gonna try getting an exponential curve on at least two sides of the basic horn dimensions I posted earlier. I've got alot of ideas but not much information to draw from. I'll just wing it and make my own evaluations and conclusions. Ya gotta start somehow.

OK, I have figured out how to draw an exponential curve. Now, how does the wavelength of the frequencies covered and time apply? Anyone?

not sure if I understand your question?
Here are a few links I had saved to favorites that might give you an answer.
http://www.quarter-wave.com/Horns/Horn_Theory.html
http://www.ossaudio.com/hornbackgrounder.htm
http://melhuish.org/audio/horn.html
Greg

Where do I hook up the wires?

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see those thingys on the back?

Larry,

Is that an early Bose design?

Jorge