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Old 28th August 2012, 09:18 AM   #11
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P.s. A small R before the cap(on the amp side) should help to reduce the peaking at Fc on the HP. Say 1 to 3 ohm? Yes you lose a bit of volume, but it may alleviate the problem.
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Old 2nd March 2013, 10:56 AM   #12
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Spent a couple of hours with Boxsim and I have some question.

Are there any driver files available for Boxsim on the net?

Is there a way to save only driver parameters? I find it tedious if I need to retype driver parameters when trying different projects. I can rename and load project and continue from there, but sharing driver information would be nice if possible.

...I found the Chassis catalog thought, but files in there are not plain text files for editing.
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Old 2nd March 2013, 12:39 PM   #13
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Quote:
Originally Posted by DEQ+TheEnd View Post
Spent a couple of hours with Boxsim and I have some question.

Are there any driver files available for Boxsim on the net?

Is there a way to save only driver parameters? I find it tedious if I need to retype driver parameters when trying different projects. I can rename and load project and continue from there, but sharing driver information would be nice if possible.

...I found the Chassis catalog thought, but files in there are not plain text files for editing.
If you are looking at the '.BCH' files, then you are correct. That is from the tab 'Load driver from file'. This is the Visaton data.

However if you look you can import .ZMA and .FRD data using the 'import' tabs in the lower half of the driver window (drivers & enclosures > driver1 > driver data)

If you can find, OR make (using FRD consortium tools SPL trace etc) your own .ZMA and .FRD files with which you can simulate other drivers.

Some useful links:

FRD Consortium tools guide
FRD Consortium tools guide

some .zma and .frd files:

Driver FRD & ZMA files

I like this guys site, and he had files for the Audax I have. Unlike many, he does quote the measurement environment, although in the end (for me at least) it isnt of much use.

I gather hes an advocate of SpeakerWorkshop (by that I mean that perhaps in SW the driver location and box size can be accounted for in the imported files.

However, Boxsim is more limited (it is free after all).
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Last edited by mondogenerator; 2nd March 2013 at 12:52 PM.
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Old 2nd March 2013, 01:01 PM   #14
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Thanks mondogenerator !

I'll look more into this. My initial observation conclude that we still don't have a tool to save and share complete driver files but this helps a lot?

Is it possible to simulate open baffle with Boxsim?
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Old 2nd March 2013, 02:05 PM   #15
Rudolf is offline Rudolf  Germany
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Quote:
Originally Posted by DEQ+TheEnd View Post
Is it possible to simulate open baffle with Boxsim?
Basicly yes. Boxsim will simulate the rear radiation as a BR port on the back of the baffle. The simulation is better for large baffles than for small ones. Simulation of "raw" drivers (without any baffle to speak of) is useless.
There is a guide at boxsim.de for filling in the "Enclosure & Impedance" window tabbed from the "Edit driver x, enclosure and baffle" window: Boxsim - FAQ 011
Just fill in exactly the same values as in the picture.
You need to make sure the BR opening is really exactly opposite the driver opening.
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Old 2nd March 2013, 02:15 PM   #16
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Thank you!
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Old 2nd March 2013, 06:32 PM   #17
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ive learnt that alot is possible in Boxsim, and that if you make zma and frd using SPL trace, and you use published graphs, then using the infinite baffle or DIN baffle setting seems appropriate. However, few specs quote IEC DIN or other standards, so it may not be totally accurate. However, should you measure SPL in free field and using the intended box geometry and volume, then entering the same into Boxsim and using option5 in the measurement condition drop down list, then it should be just as good as sims using the visaton database.
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