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Old 23rd March 2008, 03:22 AM   #1
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Default T/S parameters for horn drivers

What are the most commonly used T/S parameters for selecting drivers used for horn applications? I guess they will differ some for bass, midbass, mid etc. horns? That is, what are you looking for?
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Old 23rd March 2008, 10:28 PM   #2
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Default My 2 cents worth!

For cone driven horns with compression chamber backs to seal them, I look for the lowest value of "Qts" I can find.

Ron
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Old 24th March 2008, 05:38 PM   #3
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For LF/MB read Bruce Edgar's articles at www.volvotreter.de .

For HF read Geddes.
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Old 24th March 2008, 09:38 PM   #4
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Quote:
For HF read Geddes.
Do you mean his book "Transducers etc"?

I was a bit sloppy in my initial post. I intend to do a 4-way horn system, and the low pass horn will be a tapped horn.

I would also like to know if any of you out there, have any preferences regarding the upper mid section, that is, if you prefer a cone driver or compression drivers, and why you have that particular preferens?

In the meantime, I will have a look at the suggested papers.
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Old 24th March 2008, 10:18 PM   #5
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Quote:
Originally posted by buggsson
Do you mean his book "Transducers etc"?
I've never read it, though I might now the USD is about to be renamed the NAP (North American Peso) and it's more affordable to me. There is a long thread here called Geddes On Waveguides that has lots of info.

Quote:
Originally posted by buggsson
I intend to do a 4-way horn system, and the low pass horn will be a tapped horn.
I was once a mad hornie, but I think a HE direct radiator system will prove superior. Still in the final design stages of mine, though I will be using TH's for subs.

Quote:
Originally posted by buggsson
I would also like to know if any of you out there, have any preferences regarding the upper mid section, that is, if you prefer a cone driver or compression drivers, and why you have that particular preferens?
Define upper-mid

Magnetar's posts here are worth reading; he has a lot of experience with many horn designs and is using a dipole/horn hybrid currently. Well as currently as I'm aware; he builds a new speaker system more often that I change my socks.
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Old 24th March 2008, 10:54 PM   #6
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Yes, I've seen the Geddes thread, I will dig in a bit later.

The upper mid would be covered approximately between 800 - 1K Hz to 6K - 8K Hz or thereabouts.


Quote:
HE direct radiator system will prove superior.
What is a HE direct radiator system? Cannot say I've ever heard of it earlier. Do you have a nice source I can turn to to see what it is?

I will try to look up some of magnetar's posts to see what he's been up to.
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Old 24th March 2008, 11:11 PM   #7
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Quote:
Originally posted by buggsson
The upper mid would be covered approximately between 800 - 1K Hz to 6K - 8K Hz or thereabouts.
Previously I would have said tractrix, but I've played with some terminated conicals (using rolled blankets at the mouth) with excellent results. Got waveguides on the way, so I'll be interested in my own findings re those.
I've got DDS, 18Sound 1" versions on the way, and a friend turning up some 2" versions a bit larger than Bouska's.
Quote:
Originally posted by buggsson
What is a HE direct radiator system? Cannot say I've ever heard of it earlier. Do you have a nice source I can turn to to see what it is?
High Efficiency Direct Radiator. Not common and usually large.
Here are my two inspirations for the current build though there are a lot of other influences too.

http://audioheritage.org/vbulletin/s...ad.php?t=12126
http://www.audioheritage.org/html/pe...ues/system.htm

There are too many compromises in horns I don't like so much now, so I'm after the efficiency, dynamics, SPL capability and low distortion and compression but with better integration with the new system.

I'm even selling my Klipschorns.

Quote:
Originally posted by buggsson
I will try to look up some of magnetar's posts to see what he's been up to.
Also go to Audio Asylum High Eff board as there are a lot of old posts and descriptions of some of his previous exploits.
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Old 25th March 2008, 08:53 AM   #8
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Hey Brett, could you shoot me an email, thanks?

Got some questions about Tractrix stuff.
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