Using SPL & Impedance graphs to generate ZMA & FRD files for crossover modeling
Is there a way to use the data in freq. response and impedance graphs to generate FRD and ZMA files?
I've heard the term 'graph grabbers' but I don't know where to find them, or how to use them. I assume this is a software to interoperate graphs somehow? Any pointers greatly appreciated! 🙂🙂🙂
Hi, I'm new here so correct me if I'm wrong but...
As I understand it:
FRD files = Frequency Response data
ZMA files = Impedance data
Correct?
I need both ZMA and FRD files to use crossover modeling software however...
Manufacturers often share Frequency Response data and Impedance data as PDFs or PNGs but (with the exception of Dayton Audio) rarely FRD and ZMA files.
Dayton are great but I don't want to be reliant Dayton components solely for the reason they're the only drivers I can model with.
Thanks in advance <3
Is there a way to use the data in freq. response and impedance graphs to generate FRD and ZMA files?
I've heard the term 'graph grabbers' but I don't know where to find them, or how to use them. I assume this is a software to interoperate graphs somehow? Any pointers greatly appreciated! 🙂🙂🙂
Hi, I'm new here so correct me if I'm wrong but...
As I understand it:
FRD files = Frequency Response data
ZMA files = Impedance data
Correct?
I need both ZMA and FRD files to use crossover modeling software however...
Manufacturers often share Frequency Response data and Impedance data as PDFs or PNGs but (with the exception of Dayton Audio) rarely FRD and ZMA files.
My question is: Is there a way to use the data in freq. response and impedance graphs to generate FRD and ZMA files?
It should be possible, all the data is there... just in the wrong format.
It should be possible, all the data is there... just in the wrong format.
Dayton are great but I don't want to be reliant Dayton components solely for the reason they're the only drivers I can model with.
Thanks in advance <3
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Copying the graphs is really just step one of a multi-step process. Here's a great write up of all the steps:
Paul Carmody's DIY Speaker Pages - Simulated Measurements pt1
Paul Carmody's DIY Speaker Pages - Simulated Measurements pt1
Note that the cabinet affects both frequency response and impedance. This is not included in the information stated in the data sheet. The primary thing is to add the effect of baffle step to the frd files. VituixCad can do this.
Furthermore, the real specs can be off from the data sheet. Measuring them yourself is preferred.
Furthermore, the real specs can be off from the data sheet. Measuring them yourself is preferred.
Yes. See step 5 in the Paul Carmody link to see how the in-cabinet impedance should be simulated. Steps 6 (low end response) and 7 (baffle step and diffraction) simulate the in-cabinet frequency response.