Simple question but, I'm not sure about that:
Bass speaker crossover; there is serial inductor and paralel capasitor&resistance (6,8uf&3,3ohm-series). Speaker is 3,8-4ohm and 0,06mh.
So, question is this series capasitor&resistance(c3, r4) are Zobel network?
Bass speaker crossover; there is serial inductor and paralel capasitor&resistance (6,8uf&3,3ohm-series). Speaker is 3,8-4ohm and 0,06mh.
So, question is this series capasitor&resistance(c3, r4) are Zobel network?
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It looks like you are trying to paste the image in directly, that doesn't work. How to attach images to your posts.
Tony.
Tony.
I don't have frd and zma for a four ohm driver with that low a voice coil inductance, but doing a quick sim on a driver with 0.2mH voice coil it certainly isn't having much of a zobel like effect.
It may be being used for subtle repsonse shaping or possibly to modify the phase a little to get better phase alignment with the drive it is intgerating with.
edit: sorry it is acting like a zobel, I'm tired, and stuffed up the sim 🙂
Tony.
It may be being used for subtle repsonse shaping or possibly to modify the phase a little to get better phase alignment with the drive it is intgerating with.
edit: sorry it is acting like a zobel, I'm tired, and stuffed up the sim 🙂
Tony.
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Haha, yes well done. I went of to convert the image and it was all done when I got back. 🙂
It might be for impedance, or it might be for increasing the rolloff. It's the same thing in one sense.
I made an other measurement for speaker as 0.37 mh. I want to correct it.
0.06mh was look too low. Another device another result 🙂
0.06mh was look too low. Another device another result 🙂
That certainly looks more realistic. A woofer with such low voice coil inductance certainly seemed unlikely.
Tony.
Tony.
Sorry, what do you mean with driver? amplificator, full crossover, speaker? If speaker I don't know the characteristics. tannoy MX1. Old speaker, I'm testing for a new diy speaker.
The graph was just to show what the 6.8uF cap + 3.3ohm resistor does to the impedance of a similar woofer 🙂 the black curve shows the rise in impedance due to the voice coil inductance, a filter works differently depending on the impedance. Using a zobel to flatten out the impedance (as in the blue curve) means that the crossover (in your case the 1mH coil) is dealing with a more constant impedance which will change the rolloff to an extent.
Tony.
Tony.