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Old 17th November 2009, 06:10 AM   #1
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Default Modeling stacked horns in hornresp

Ahoy. I'm trying to model a bunch of stacked Altec 816s in parallel. According to the HornResp wiki (diyAudio.com Wiki - projects by fanatics, for fanatics), this can be done, but it doesn't say how. I've tried going into the driver wizard and specifying "2P" drivers, but the curve looks like it's amplified a few db but the frequency response hasn't changed at all. Note that I've also tried a quick search of the forums.

Any idea what I'm doing wrong?
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Old 17th November 2009, 06:26 AM   #2
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Originally Posted by letsbangout View Post
Ahoy. I'm trying to model a bunch of stacked Altec 816s in parallel. According to the HornResp wiki (diyAudio.com Wiki - projects by fanatics, for fanatics), this can be done, but it doesn't say how. I've tried going into the driver wizard and specifying "2P" drivers, but the curve looks like it's amplified a few db but the frequency response hasn't changed at all. Note that I've also tried a quick search of the forums.

Any idea what I'm doing wrong?
Hi letsbangout,

After calculating the SPL response for a single speaker, select 'Multiple Speakers...' from the Tools menu.

Note that for multiple-segment horns Hornresp Version 23.50 or later is required.

Kind regards,

David
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Old 17th November 2009, 07:32 PM   #3
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A cheater method to simulate the behavior of four from one is to choose corner loading when you know you'll be using them in 1/2 space. Or 1/4 space for two in 1/2 space.
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Old 19th November 2009, 12:21 PM   #4
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Thanks David.

Do you have any plans to make hornresp more network-aware? Whereas "network" is one or more tuned circuits which comprise the array of drivers in the horn. Specifically, I'm a bit curious how some of my designs would look when run from multiple amps, versus paralleling up a bunch of drivers.
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Old 19th November 2009, 12:41 PM   #5
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Originally Posted by davygrvy View Post
A cheater method to simulate the behavior of four from one is to choose corner loading when you know you'll be using them in 1/2 space. Or 1/4 space for two in 1/2 space.
Cheating indeed. That would, in no wise, account for the broadened electrical Q, only the space gain. Maybe David can comment on this?
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Old 20th November 2009, 06:23 AM   #6
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Originally Posted by letsbangout View Post
Do you have any plans to make hornresp more network-aware?
Sorry, no :-).
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Old 20th November 2009, 06:30 AM   #7
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davygrvy
That is how I "cheat" to simulate 4 cabs.

it isn't perfect but close.
I mean if you want perfect go use Akabak. I just need close.

Last edited by FlipC; 20th November 2009 at 06:32 AM.
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Old 20th November 2009, 06:48 AM   #8
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Originally Posted by letsbangout View Post
Cheating indeed. Maybe David can comment on this?
Hi letsbangout,

As far as Hornresp is concerned, two single-segment horn loudspeakers connected in parallel radiating into 4 pi space will produce the same SPL response as one speaker with the same Eg radiating into 2 pi space, provided that Rg = 0. This "mirror" principle can of course be extended as required.

Kind regards,

David
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Old 23rd November 2009, 06:03 PM   #9
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Originally Posted by David McBean View Post
Hi letsbangout,

As far as Hornresp is concerned, two single-segment horn loudspeakers connected in parallel radiating into 4 pi space will produce the same SPL response as one speaker with the same Eg radiating into 2 pi space, provided that Rg = 0. This "mirror" principle can of course be extended as required.

Kind regards,

David
I'm not sure I follow what you mean about the same SPL. My understanding is that drivers in parallel will half the inductance, thus a broader Q. It also shifts the entire usable frequency spectrum downward.

Are you saying that hornresp does not take this into account?
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Old 23rd November 2009, 06:37 PM   #10
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Is your question about multiple cabinets or multiple drivers within the same cabinet?
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