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  1. 01-17-2006, 02:38 PM #1
    E T Frog
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    Help! Old speakers--polarity not marked

    I have a pair of old Fisher speakers I want to use, but the polarity is not marked. One terminal is marked GROUND/COM. Is that the positive or negative terminal? Thanks very much.
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  2. 01-17-2006, 03:34 PM #2
    pelly3s
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    the other terminal would be positive
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  3. 01-17-2006, 04:07 PM #3
    calegrant
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    Ground=negative=black
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  4. 01-18-2006, 02:36 PM #4
    bfalls
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    As long as the cabling was identical on each speaker you should be OK. Another way to check polarity would be to use a AA battery. With cables connected touch each of the conductors to each end of the battery. If the cone moves out, the conductor touching the positive end of the battery is positive.
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