Cheap Speaker Finder

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=85164
Printed Date: May 10, 2025 at 3:05 PM

Topic: Cheap Speaker Finder

Posted By: hotwaterwizard
Subject: Cheap Speaker Finder
Date Posted: November 05, 2006 at 1:41 PM

Here is a circuit that will cost about 10 bucks and will help you find unknown speaker wires in a car.

It is an Audio Generator or otherwise known as an Audio Oscillator.

It just puts out a simple tone so you can find the speaker wires.

The Transistors I used were out of an old car stereo in the scrap pile and my cost was nothing.

posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Replies:

Posted By: hotwaterwizard
Date Posted: November 05, 2006 at 1:54 PM

You can use the same Circuit as a Continuity tester for wires and fuses, etc. by rearranging the wires.

posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: coppellstereo
Date Posted: November 05, 2006 at 5:13 PM

fancy

I usually just pop the speaker wires with my 12v drill battery

your way is much cooler

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Posted By: sin0cide
Date Posted: November 05, 2006 at 8:03 PM

what about amplified systems? wouldn't your 12volt battery or this continuity tester toast the amp?

Posted By: hotwaterwizard
Date Posted: November 06, 2006 at 1:45 AM

Not if you use two 1.5 volt batteries instead of the 9 volt.

An amplified system will accept up to about 3 volts without dammage. But, the amp is not on when the hot lead or remote is not connected. You can use a capacitor of 1uF on the output as isolation if you are really concerned with this.

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

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