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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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gregm
3,409 posts
 
Alfredo, are there gross anomalies in yr woof's impedance curve around the chosen x-over point that necessitate a zobel?? If not, live with the woof's inductance pattern. If yes, you're stuck with it! If you're adventurous, try the zobel both in front and behind the xover & choose the setting you prefer...
eldartford
4,262 posts
 
My Seas Odin speakers (rears) have a network across the two W18E001 magnesium cone woofers. Its purpose is to tame a well defined peak in the response of these drivers, just before they roll off. Away from this peak, the response is very flat, and the peak and the associated network to tame it is the penalty. Nothing comes for free! These drivers would have to be crossed over much lower if they were used without the network.
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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