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Old 12th December 2012, 05:07 PM   #3031
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WAY COOL!

I had no idea this was possible.

I couldn't get it to work in my favorite FRD tool (assymmetrical response pattern estimator) but I *was* able to get it to work in Bagby's xover simulator.

Here's how I did it (very easy)

1) to get the FRD file, open your hornresp design's frequency response plot. Then export the plot as a text file.
2) to get the ZMA file, do the same thing as step 1, but do it using the impedance plot, instead of the frequency response plot.

The last step is that you have to comment out the first line of the file. Do that by typing "*" at the beginning of the line.

That's it!

Here's a Paraline simmed in Bagby's xover simulator:

Click the image to open in full size.
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Old 12th December 2012, 07:42 PM   #3032
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by epa View Post
hi martin
i opted a simular question a few pages back.
Hi epa,

Thats easy to do: You only need to convert the HR textfile to a format that any of these program can recognize:

FRD Consortium

PS: I usually first import the .wav files from HR to HOLMimpulse where I edit the IR/FR and then export to e.g. MPRM program where you can do all filtering/ Eq. and the back to Holmimpulse to present the resulting graphs you want to display.
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Old 12th December 2012, 08:32 PM   #3033
epa is offline epa  Netherlands
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you read my mind bjorno.
i was going to send you a pm for a tuteral.
got this post bookmarked.
verry bussy till the holidays,then i wil try it out.
already got the wav file imported in to holmimpulse,but never found the time to go furter.
tnx ,much apreciated.
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Old 12th December 2012, 10:40 PM   #3034
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Quote:
Originally Posted by Xoc1 View Post
... For bass reflex designs and tapped horns, a hi-pass filter is a necessity above a fairly low power level, and must be concidered as an integral part of the design process.

There is also the QB5 reflex alignment that uses a port tuned for a resonant peak and a filter to reduce cone excursion and give a resultant extended flat reponse. ...
There's no one program that I am aware of that does it all "in the box".

For classic enclosure topologies (sealed, ported, bandpass), Brian Steele's "Ported" spreadsheet from diysubwoofers.org has a comprehensive set of built-in filters. I use it for experimenting with non-standard alignments such as QB5 and for enclosures for car use.

Kristian Ougaard's Unibox spreadsheet allows importing an active filter response in .frd file format.

AkAbak allows defining active (and passive) filters. You can define active filters to place inline with the driving signal, and passive filters (inductors, cpacitors, resistors) to place inline with the drivers. The active filters can either be "black box" (defined response) or built from components (op-amps, R, L , C).

I usually use Ported or Hornresp to get a design "in the ballpark", then export it to AkAbak for refinement if it shows promise.
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Old 13th December 2012, 06:20 AM   #3035
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Quote:
Originally Posted by more10 View Post
Is there any chance of adding Helmholz chambers in between segments? Is there any chance of adding ports in between segments?
Hi more10,

Unfortunately I cannot justify the amount of work required to add the above features to Hornresp, particularly as they are already available in AkAbak.

At the very minimum, major changes would be required to the input parameters screen, the schematic diagram, the loudspeaker wizard, and the AkAbak script export tool.

Kind regards,

David
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Old 13th December 2012, 06:40 AM   #3036
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Quote:
Originally Posted by Xoc1 View Post
I do feel that it would be a great addition to your software and would result in some very creative designs.
Hi Martin,

Sorry, but there is nothing that anyone can say (no matter how compelling the argument) that will cause me to change my mind with regard to electrical filters in Hornresp.

I do give you full marks for trying, though :-).

There is always AkAbak, of course...

Kind regards,

David
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Old 16th December 2012, 01:20 AM   #3037
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I havent read this whole thread, but would like to know if i can simulate multiple drivers into a single horn, like two of the same driver with a common throat/mouth.

what i was thinking was if one had an Sd of 310, would it be as simple as changing it to 620? would i also need to change anything like Fs or Vas? ect?
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Old 16th December 2012, 04:44 AM   #3038
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Quote:
Originally Posted by klampykixx View Post
I havent read this whole thread, but would like to know if i can simulate multiple drivers into a single horn, like two of the same driver with a common throat/mouth.

what i was thinking was if one had an Sd of 310, would it be as simple as changing it to 620? would i also need to change anything like Fs or Vas? ect?
Hi klampykixx,

Enter the driver parameter values for a single driver, and then select the Tools > Driver Arrangement menu command from the Input Parameters window when in Edit mode.

It is not necessary for the user to manually adjust any of the driver parameter values to account for multiple drivers - Hornresp does this internally, automatically.

Kind regards,

David
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Old 16th December 2012, 04:52 AM   #3039
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ok, so that will act as two or more drivers in the same horn as is simulated, not as if there were two of the same horn next to each other?

edit: just tried it in both pre calculated section and post calc section. it definately changes things. thanks
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Old 16th December 2012, 05:21 AM   #3040
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Hi klampykixx,

Quote:
ok, so that will act as two or more drivers in the same horn as is simulated,
When you use the Driver Arrangement tool, that is correct.

Quote:
edit: just tried it in both pre calculated section and post calc section. it definately changes things. thanks
If by "post calc section" you are referring to using the Multiple Speakers tool, then please note that this tool allows multiple horns to be specified, not multiple drivers. By using both the Driver Arrangement tool and the Multiple Speakers tool together, it is possible (for example) to have two horns connected in parallel, with each horn containing two drivers connected in series.

Kind regards,

David
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