does anybody know what this is?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=117446
Printed Date: May 10, 2025 at 2:28 AM

Topic: does anybody know what this is?

Posted By: spmpdr
Subject: does anybody know what this is?
Date Posted: November 03, 2009 at 1:19 PM

I know its a crossover setup of some kind ,It has no identifying marks on the resistor and states 50v 100 uf biploar on the capacitor

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-A vision without a plan is just a hallucination-

Replies:

Posted By: 91stt
Date Posted: November 03, 2009 at 2:26 PM

you might be looking at a Zobel network

Posted By: DYohn
Date Posted: November 03, 2009 at 3:04 PM

Got a picture?

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Posted By: t&t tech
Date Posted: November 03, 2009 at 3:42 PM

Interesting! posted_image

Posted By: haemphyst
Date Posted: November 03, 2009 at 5:38 PM

My crystal ball must be malfunctioning today...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: i am an idiot
Date Posted: November 03, 2009 at 5:45 PM

My Crystal Ball is still broken, so you will have to look at this diagram and see if this configuration is as your setup.

Zobel

A Zobel is a filter used to stabilized loudspeaker impedance in a crossover-speaker circuit. This consists of a capacitor with a value equal to one which gives a crossover frequency at the frequency where the impedance has doubled, in series with a resistor which has a value equal to 1.25 times the nominal loudspeaker impedance. This is connected parallel to the loudspeaker between the loudspeaker and crossover. Zobel Calculator
posted_image

Loudspeaker manufacturers usually provide you with technical data containing an impedance curve and other information such as recommended enclosure sizes, etc.

Posted By: spmpdr
Date Posted: November 03, 2009 at 5:51 PM

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-A vision without a plan is just a hallucination-

Posted By: spmpdr
Date Posted: November 03, 2009 at 5:54 PM

Those are the pics.

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-A vision without a plan is just a hallucination-

Posted By: spmpdr
Date Posted: November 03, 2009 at 5:56 PM

sorry everyone the pics didnt go through earlier ,I thought they did.

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-A vision without a plan is just a hallucination-

Posted By: DYohn
Date Posted: November 03, 2009 at 5:59 PM

Those are crossover parts. The first picture shows a capacitor, the second picture shows a capacitor and an inductor.

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Posted By: i am an idiot
Date Posted: November 03, 2009 at 6:02 PM

Band Pass Filters

Band Pass filters allow a range of frequencies to pass above a selected crossover frequency and below another selected crossover frequency, filtering out all frequencies outside this band. In a first order (6dB per octave) filter, this consist of a low pass filter (coil) and a high pass filter (capacitor) in series with a loudspeaker. Narrow Band Pass Filters are to be used when the bandwidth is less than two decades.
posted_image

Posted By: spmpdr
Date Posted: November 03, 2009 at 6:05 PM

Thats what I figured ,I found them inside the metal body behind the kick panels in my truck they were hooked up on one end to the positive side of the factory speaker wire and the other end was cut away from the negative speaker wire .Does anyone have any idea what type of setup they would be used for?

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-A vision without a plan is just a hallucination-