technical question re: speaker Xovers.
Nov 4, 2008 at 3:29 PM Thread Starter Post #1 of 6

Champ04

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So I ran across something I've never seen before and would like someone with more experience to explain it to me.

I have a pair of Dunlavy SC-1 speakers. The design uses a pair of Vifa P13WG-00 8ohm drivers in parallel.
It's a first order design, so only one coil. The coil has no value marking on it but I know it to be crossed over at 3500Hz.

Here is the confusing part. The circuit has a zobel (2ohm/2.7u). But instead of paralleling the drivers, which is what I have always seen before, it parallels the coil.

Why?

Looking at the impedance/phase measurements, it is obviously preventing the impedance from rising in the upper frequency of the driver's operating range.

What difference does this design make?

Thanks!
 
Nov 6, 2008 at 8:24 PM Post #2 of 6

Champ04

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okay, no bites on this one.

Can anyone suggest a forum somewhere more fitting for this type of question?
Thanks!!
 
Nov 7, 2008 at 8:33 PM Post #3 of 6

Nick 214

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Quote:

Originally Posted by Champ04 /img/forum/go_quote.gif
okay, no bites on this one.

Can anyone suggest a forum somewhere more fitting for this type of question?
Thanks!!



Yes. Come on over to PE's Tech Talk.

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We're a small, yet dedicated group. If you don't get many responses, I'll send out some PMs...

Good Luck!
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Nov 10, 2008 at 4:14 AM Post #4 of 6

Champ04

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cool.
Thanks!
 
Nov 10, 2008 at 4:27 AM Post #6 of 6

sunseeker888

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Like you say, this design is used to prevent impedance swings at certain frequencies. I sincerely doubt that that crossover circuit would degrade sonics much; and it is requiring for overall system response.

As usual, if the quality of parts is decent, and the design is implemented correctly, there is no need for concern.
 

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