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Zobel network

Having to build my own crossover, I have come across to tweak my crossover by adding a zobel network. From my understanding, a zobel network helps flatten the impedence curve of a speaker to nominal. With the impedence curve flat, the phase of the speaker comes close to in-phase or 0%.

Since this tweak is very simple, does anyone know of anyone of any speaker company that uses this network or have modified a speaker with a zobel network?

Thanks
Alfredo
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usblues
1,217 posts
 
I am not a techie,but a real good amp designer in So Cal said a few months back,he does not like what they do in amps with regards to the sound coming out of the speakers.Just an opinion of course...Bob
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highend64 OP
277 posts
 
Thanks for the responses. Gregm, judging the speakers T/S parameters, the impedence is up to 28 ohms at the crossover point with is 2500hz. At the point where the the impedence start to rise is at about 350 hz. At 1k, it has risen to 16.30 ohms.

So far I have the resistors but I'm still need the capacitors but don't with one to go. Electrolytic or poly caps?

Thanks
Alfredo

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highend64 OP
277 posts
 
The electrolytic is non-polarized. Sorry about the mis interpretation. Polarized electrolytic is a no-no. :)
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highend64 OP
277 posts
 
Just tested the network today and notice an improvement in the midbass. As of now, midbass sound punchy and articulate. Their seem to be more control on the cone but I can't conclude on this since the components are not fully burn in.

Thanks
Alfredo
gregm
3,409 posts
 
Alfredo, use the cheapest caps to determine the optimum value. Since you're nearly (already?) there, one way of "burning in" caps is to charge and discharge them (outside the circuit of course) with ever increasing voltage until you reach ~90% their nominal value.
Sean's input would be useful here
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