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how to check for polarity

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=94469
Printed Date: October 31, 2024 at 6:48 PM


Topic: how to check for polarity

Posted By: snhtown
Subject: how to check for polarity
Date Posted: June 02, 2007 at 7:18 PM

hey guys i have  pair of speakers, but they are not maked +/-  there is a red dot and i am assuming that marks positive, but i want to be sure.  they are cdt's.  does anyone know how to check with a meter? is there a way?




Replies:

Posted By: swerve
Date Posted: June 02, 2007 at 7:40 PM
take a 9 volt battery and hook it up to the speaker and "pop" it. if it goes up your polarity is correct. if it goes down you have to polarity reversed. you can't check it with a meter.

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git yer swerve on!




Posted By: snhtown
Date Posted: June 02, 2007 at 8:03 PM
bummer, thnx ll try that




Posted By: stevdart
Date Posted: June 03, 2007 at 9:20 AM
The red dot is always the positive terminal.  On some woofers (such as 8 ohm), it is purple.  Another method of marking polarity is wide spade / narrow spade, with the wide spade positive.  Otherwise, it is marked with a +.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.





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