Zobels and 3rd order crossover???
when using a zobel calculator I was given 14uf and 8ohms for my driver, however this is for use with a 3rd order crossover and will essentially be put in parrallel with a 4uf and 2ohm.
Does this need to be taken into consideration?
Should I run a 10uf instead of the 14?
Is there a formula?
Also is there a calculator for a zobel using an inductor to take the low range impedance hump out? I'd also like to experiment with that while I'm currently running wires out of my ports.
Thank you
when using a zobel calculator I was given 14uf and 8ohms for my driver, however this is for use with a 3rd order crossover and will essentially be put in parrallel with a 4uf and 2ohm.
Does this need to be taken into consideration?
Should I run a 10uf instead of the 14?
Is there a formula?
Also is there a calculator for a zobel using an inductor to take the low range impedance hump out? I'd also like to experiment with that while I'm currently running wires out of my ports.
Thank you
Why still use such calculator? Many software are free and easy to use, and you will understand things much better with the visual presentations.
I tried using two different software and ended up frustrated, one was eminence software which is very limiting when free, stumbled across that when I was looking for specific files from eminence to run in another program that needed them (forgot the name, I think it was an independent software). couldn't get either to work for me.
Can you recommend one?
Can you recommend one?
The impedance rise compensation that you are using can stay as it is. Apply the third order filter regardless. If you were measuring or simulating you could afford to consolidate and minimise the component count. It is difficult to calculate and otherwise not recommended to guess.
About the impedance resonance peak filter, yes that can be done but you may not need to.
About the impedance resonance peak filter, yes that can be done but you may not need to.
well crossover workshop doesn't seem to want to allow me to put anything in parallel??? And there's no help file or tutorial... so is there a trick or a better program?
never mind about that figured it out,
BUT, same problem with the other programs I've used, need frd zma files, they seem to be hard to get, but I guess I'm on the right track.
Thanks
BUT, same problem with the other programs I've used, need frd zma files, they seem to be hard to get, but I guess I'm on the right track.
Thanks
The best zma and frd files are the ones you measure yourself, with the driver in your actual cabinet 🙂
Impedance is quite easy to measure. You only need a cable, a resistor and a full duplex sound card with line out and line in. software such as ARTA, REW, AudioTester or speaker workshop can then be used to measure the impedance. I used to use speakerworkshop but found with light cones it doesn't seem to get it right, so now use REW.
http://www.claudionegro.com/sw/swsetup/cables/cables.html
FRD requires a bit more, in that you should have a calibrated microphone, and potentially a microphone preamplifier. REW, ARTA or Holm Impulse can all do frd measurements.
I find speaker-workshop great for simulating crossovers, and it has an auto zobel calculation.
Tony.
Impedance is quite easy to measure. You only need a cable, a resistor and a full duplex sound card with line out and line in. software such as ARTA, REW, AudioTester or speaker workshop can then be used to measure the impedance. I used to use speakerworkshop but found with light cones it doesn't seem to get it right, so now use REW.
http://www.claudionegro.com/sw/swsetup/cables/cables.html
FRD requires a bit more, in that you should have a calibrated microphone, and potentially a microphone preamplifier. REW, ARTA or Holm Impulse can all do frd measurements.
I find speaker-workshop great for simulating crossovers, and it has an auto zobel calculation.
Tony.
Speaker Workshop.
The idea is that calculators (even SW to some extent) just don't work. But with SW you will learn a lot of thing, to understand the concept of things. When you have understood the concepts, a calculator will be more usable to you than a computer to those who do not understand.
So do I. Other than that I only use it for displaying, operating on and combining charts. I still need to export everything to display polar charts, and I still need to do my own power and D.I. calculations. I don't use any of the automatic functions or measurement tools. Still, it accounts for many lost hours.
I gave up using speaker workshop for measurements. I just couldn't get consistent results. Now use holm impulse for FR and REW for impedance, but I import into speaker workshop for the crossover modeling and also for the chart combing 🙂
Tony.
Tony.
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