where can I get FRD files of my drivers?

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#2
If the manufacturer doesn´t tell you on his webpage for example you might only be lucky that somebody measured his drivers and supplies you with the files.

Of course they´d need to know which drivers you are talking about...

If you have them on paper, like from a magazine...
there is a program called SPL tracer which writes frd-files from diagrams you scanned in. So for example (*.jpg->*.frd)
I just recently read about it in the Klang+Ton magazine and am just about to download it.
(They say there are some more useful tools on the site.)
http://www.pvconsultants.com/audio/frdgroup.htm
 
#3
yes, I have just downloaded it too, and started playing with it while I wrote the first post, but I couldn't figure out how to trace the graph - I configured everything but couldn't figure xactly how to trace.
I would be grateful if you could post an explanation when you understand it.

P.S
there are more useful told, like a crossover simulator and some other free stuff, all Excel-based, that simulator is why I wanted the FRDs in the first place...

P.P.S
My drivers are SEAS T17RE and vifa DX25TG(05-05) or XT25TG(30-04)
 
#4
You have to set the limits as you obviously did.
Go to options and define if you wanna trace-free-form or with limits.
The program will move on the frequency axis and you just have to click the corresponding dB-value.
In the trace-free-form it wants quite a number of values and so moves very slowly.
Choose the latter option and say from 20Hz-4kHz and choose like 100 values.
 
#5
Don´t know why but SPL tracer puts a "," as decimal point which a lot of programs including passive crossover designer don´t "understand"..:whazzat:
You can load in the *.frd file with SPL-viewer, normalize the frequency response and save it.
SPL viewer will save the frd-file with decimal points.😎
 
#8
piro said:
yes, I have just downloaded it too, and started playing with it while I wrote the first post, but I couldn't figure out how to trace the graph - I configured everything but couldn't figure exactly how to trace.
I would be grateful if you could post an explanation when you understand it.

P.S
there are more useful told, like a crossover simulator and some other free stuff, all Excel-based, that simulator is why I wanted the FRDs in the first place...

P.P.S
My drivers are SEAS T17RE and vifa DX25TG(05-05) or XT25TG(30-04)
Click to expand...
I have files at my site for the two Vifas, though the DX25 was an early one. I don't know if they've improved the top end on newer ones. These are @0.5m, so they will be 6db higher than the standard 2.83v @1m. You can drop the sensitivity using the FRC or other software such as the free version of Praxis. Impedance files are included.

Here's a short cut to the main measurements page:

Large baffle measurements

Dave
 
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