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Old 20th January 2010, 04:43 PM   #901
AndrewT is online now AndrewT  Scotland
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does each driver have it's own chamber/s?
then simulate with just one driver and one/two chamber/s
Use 400W. You will see when you exceed Xmax and you will see the max SPL for these two limits, Xmax and maxP.

Xmax is the usual parameter for maximum unclipped SPL. Xlim is a form a soft compression that avoids hard clipping until you run out of travel and then hard clipping quickly destroys the VC.
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Old 20th January 2010, 05:16 PM   #902
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The xmax is not cumulative, each driver can only move so far.

Xmax = 13.

Power applied is for the system as a whole, 2400 W total (6*400) but it is expressed as a voltage, not a wattage, so the value entered depends on the wiring topology.
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Old 23rd January 2010, 05:49 AM   #903
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Quote:
Originally Posted by Ivo View Post
I enter a value and when I leave the box, it adds a number of zeroes. It goes from 250 to 250000.
Hi Ivo,

Not sure if it applies in your case, but with a standard Windows operating environment, the 'multiply by 1000' problem is caused by the user having a non-standard regional number setting specified on their computer.

Kind regards,

David
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Old 23rd January 2010, 05:58 AM   #904
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Originally Posted by bubblersound View Post
I just thought it was be easier to compare them with a graph or from the export text file.
Hi bubblersound,

You are correct, of course.

I could perhaps add the efficiency figures to the chart export file - it would not be a difficult thing to do.

I will keep it in mind for a future update :-).

Kind regards,

David
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Old 23rd January 2010, 06:09 AM   #905
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Originally Posted by bubblersound View Post
I'm not sure what I should input in the Maximum SPL window. My horn has 6 drivers with each driver being 400w rms, 800w program, 13mm xmax, 22mm xlim. Do I use 13 (or 22) x 6?
Hi bubblersound,

As indicated in the Maximum SPL tool description in the Hornresp Help file, Pmax is the driver rated thermal limited electrical input power and Xmax is the driver diaphragm linear mean-to-peak displacement limit. In your example, this means that you should enter Pmax as 400W and Xmax as 13mm (the values for a single driver).

The program automatically takes multiple drivers into account. If you sample your Maximum SPL chart at a power limited frequency, you will see that the total electrical input power to the system is given as 2400 watts (6 x 400W).

I am assuming that you are using Hornresp Version 25.00.

Kind regards,

David
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Old 23rd January 2010, 06:14 AM   #906
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Originally Posted by Kolbrek View Post
Hornresp gives you true efficiency.
Hi Bjørn,

Thanks for the clarification.

Kind regards,

David
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Old 23rd January 2010, 06:48 AM   #907
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I got it now. Yes, I'm using version 25 on Windows 7. Thank you.
BTW: Sometimes when I press ESC from the spl response window it says "Run-time error '340': Control array element '1' doesn't exist". Then the program closes. Restarts and works fine, not a big deal but just thought you should know.

Last edited by bubblersound; 23rd January 2010 at 06:54 AM.
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Old 24th January 2010, 12:02 AM   #908
brsanko is offline brsanko  United States
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Quote:
Originally Posted by Kolbrek View Post
Strictly speaking, that's sensitivity, but the two often get mixed up.Bjørn
I fully understand the difference and that is true except when you know what the impedence is you know the eficiency too!
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Old 24th January 2010, 08:23 PM   #909
Ivo is offline Ivo  Netherlands
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Originally Posted by David McBean View Post
Hi Ivo,

Not sure if it applies in your case, but with a standard Windows operating environment, the 'multiply by 1000' problem is caused by the user having a non-standard regional number setting specified on their computer.

Kind regards,

David
Well it sounds like a very good start to me. I don't recall specifying the number setting to something unusual, and I don't know whether to specify it in my main linux OS or in Wine. I will try this out. Again, hornresp itself seemed to run fine, in that it runs a simulation and shows a graph without error messages.

Thanks for great software!
Ivo
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Old 25th January 2010, 05:55 AM   #910
Kolbrek is offline Kolbrek  Norway
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Originally Posted by brsanko View Post
I fully understand the difference and that is true except when you know what the impedence is you know the eficiency too!
True, just use actual impedance at the actual frequency (from the impedance curve), not the rated impedance.

Bjørn
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