How to Test for Speaker Wire Polarity

Written by ty arthur
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How to Test for Speaker Wire Polarity
You can test your speakers for polarity with a 9-volt battery. (Germes)

If the positive ends of your speaker wires are not properly connected to the positive ends of your amplifier, your overall sound suffers a drop in quality. While you can purchase expensive devices to test polarity, you can an also follow some very simple steps that only use a 9-volt battery.

Skill level:

Things you need

  • Speaker system
  • Amplifier
  • 9-volt battery

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  1. 1

    Unplug your speaker system from the outlet and remove any wires connected to electrical devices, such as a television or sound system.

  2. 2

    Find the wire that is connected from either a speaker or the subwoofer to the amplifier and remove it from the amplifier end.

  3. 3

    Connect the unsheathed end of the wire to either of the coils on top of the 9-volt battery.

  4. 4

    Watch the rings on the speaker or subwoofer to see which direction it moves.

  5. 5

    Check for an inward movement of the speaker or subwoofer rings, which indicates that the polarity of the wire is incorrect. Reverse the wire before reconnecting it.

Tips and warnings

  • If the ring moves outward, the connections in the wiring are set up correctly and do not need to be changed. Reconnect the wire to the amplifier as it was originally.

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