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Old 13th November 2017, 02:28 AM   #7921
mwmkravchenko is offline mwmkravchenko  Canada
Mark Kravchenko
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To much silence.

A bug fix is most appreciated.
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Old 13th November 2017, 07:29 AM   #7922
David McBean is offline David McBean  Australia
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Originally Posted by mwmkravchenko View Post
To much silence.

A bug fix is most appreciated.
Thanks Mark :-).
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Old 13th November 2017, 08:06 AM   #7923
Sabbelbacke is offline Sabbelbacke  Germany
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Hunting down even the most tiny bugs Thank you for the ongoing support, David !!!
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Old 13th November 2017, 08:50 AM   #7924
David McBean is offline David McBean  Australia
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Originally Posted by Sabbelbacke View Post
Hunting down even the most tiny bugs Thank you for the ongoing support, David !!!
And thank you Sabbelbacke, for your ongoing support also, in continuing to provide the download website for Hornresp!
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Old 15th November 2017, 02:04 PM   #7925
mwmkravchenko is offline mwmkravchenko  Canada
Mark Kravchenko
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Originally Posted by David McBean View Post
And thank you Sabbelbacke, for your ongoing support also, in continuing to provide the download website for Hornresp!
I have never added a thank you for your services Sabbelbacke. What would we be doing without an internet host?

There are alternatives but not as easy to use.

Thanks for your time and continued support on this most interesting and useful software.
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Old 17th November 2017, 08:20 PM   #7926
andreasmaaan is offline andreasmaaan
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Hi all,

Iíd like to clarify something about modelling multiple drivers in Hornresp.

In the attached screenshot, all the entered chamber parameters result in optimal modelled performance (e.g. frequency response, phase response, driver displacement, etc.) for the project Iím working on, which is a midrange multiple entry horn.

What Iím not sure about, however, is whether the chamber parameters are correct for each of the 4 drivers, or whether they are correct for a hypothetical driver with 4 times the Sd of a single driver.

In other words, when building the design, do I want to build (for example) a rear chamber of 0.6 litres for each driver, or a rear chamber of 0.15 litres for each driver? Should (for example) the average throat chamber area be 376.8cm2 or 94.2cm2 per driver? I presume the latter is correct in both cases, but Iím not sure.

And ofc I have the same question in respect of all the chamber parameters, i.e. Vrc, Lrc, Ap1, Lp, Vtc, Atc.

Many thanks for your help

Cheers
Andreas
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Last edited by andreasmaaan; 17th November 2017 at 08:23 PM.
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Old 18th November 2017, 12:32 AM   #7927
andreasmaaan is offline andreasmaaan
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Quote:
Originally Posted by andreasmaaan View Post
Hi all,

I’d like to clarify something about modelling multiple drivers in Hornresp.

In the attached screenshot, all the entered chamber parameters result in optimal modelled performance (e.g. frequency response, phase response, driver displacement, etc.) for the project I’m working on, which is a midrange multiple entry horn.

What I’m not sure about, however, is whether the chamber parameters are correct for each of the 4 drivers, or whether they are correct for a hypothetical driver with 4 times the Sd of a single driver.

In other words, when building the design, do I want to build (for example) a rear chamber of 0.6 litres for each driver, or a rear chamber of 0.15 litres for each driver? Should (for example) the average throat chamber area be 376.8cm2 or 94.2cm2 per driver? I presume the latter is correct in both cases, but I’m not sure.

And ofc I have the same question in respect of all the chamber parameters, i.e. Vrc, Lrc, Ap1, Lp, Vtc, Atc.

Many thanks for your help

Cheers
Andreas
Sorry, I should have said multiple driver horn - not multiple entry horn (the horn uses four identical drivers which enter at the same axial point along the horn, although ofc at different points around this axis; think of something like just the midrange section on a synergy horn).

EDIT: could I also take this moment to thank David for his incredible piece of software
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Old 18th November 2017, 07:30 AM   #7928
David McBean is offline David McBean  Australia
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Hi Andreas,

Quote:
Originally Posted by andreasmaaan View Post
What Iím not sure about, however, is whether the chamber parameters are correct for each of the 4 drivers, or whether they are correct for a hypothetical driver with 4 times the Sd of a single driver.
The answer is in the Hornresp Help file :-).

"Multiple drivers share the horn system, throat chamber and rear chamber as defined by the input parameter values and as shown in the schematic diagram."

Quote:
Originally Posted by andreasmaaan View Post
In other words, when building the design, do I want to build (for example) a rear chamber of 0.6 litres for each driver, or a rear chamber of 0.15 litres for each driver?
The built rear chamber volume should be 0.15 litres for each driver.

Quote:
Originally Posted by andreasmaaan View Post
Should (for example) the average throat chamber area be 376.8cm2 or 94.2cm2 per driver?
The built average throat chamber area should be 94.2 cm2 for each driver (* Note that the throat chamber length remains constant at 0.93 cm).

Quote:
Originally Posted by andreasmaaan View Post
And ofc I have the same question in respect of all the chamber parameters, i.e. Vrc, Lrc, Ap1, Lp, Vtc, Atc.
Nothing changes, the principle remains the same. Hornresp chamber volumes and areas (Vrc, Ap1, Vtc, Atc) are total system values, shared across the multiple drivers. Hornresp chamber lengths (Lrc and Lp) remain constant, not affected by the number of drivers *.

Built values:

Vrc(B) = 0.60 / 4 = 0.15 litres
Lrc(B) = 2.50 cm *

Ap1(B) = 40.00 / 4 = 10.00 cm2
Lp(B) = 1.80 cm *

Vtc(B) = 350.00 / 4 = 87.50 cm3
Atc(B) = 376.80 / 4 = 94.20 cm2

Ltc = 350.00 / 376.80 = 0.93 cm
Ltc(B) = 87.50 / 94.20 = 0.93 cm (no change) *

To summarise - when building the system simply divide the Hornresp chamber volumes and areas by the number of drivers and leave the lengths unchanged.

Kind regards,

David
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Last edited by David McBean; 18th November 2017 at 07:33 AM.
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Old 18th November 2017, 10:22 AM   #7929
andreasmaaan is offline andreasmaaan
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Many thanks David, that's extremely helpful!
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Old 26th November 2017, 05:23 AM   #7930
mashaffer is offline mashaffer  United States
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Default Resistive vent ala Dynaco

Have tried searching through this thread and have not found what I need. Question is whether one can simulate a resistive vent (classic aperiodic) enclosure like the old Dynaco speakers which were essentially a sealed enclosure with a controlled leak by means of a stuffed (i.e. resistive) vent using hornresp.
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