1. Use dry batteries to judge

When the speaker cone retracts inward, the speaker terminal corresponding to the positive pole of the battery is the negative pole; conversely, when the speaker cone extends outward , the speaker terminal corresponding to the positive pole of the battery is the positive pole.

2. Use a dry ammeter to judge

Turn the three-purpose ammeter to the ohm gear and contact the two poles of the speaker. When in contact, the speaker will move. Push it forward ( Extending outward) is the standard positive electrode; backward (retracting) is the negative electrode.

3. Use the usual color to judge.

General audio output lines, the same speaker line will be of the same color, such as white, brown, etc., the positive line will be a solid color; the negative line There will again be a thin black line or a dotted line.

Extended information:

The positive and negative poles of the speaker cannot be connected randomly. When the phases are opposite, the speaker will still sound, but the tone will be very foggy, so the positive and negative poles are best. You need to make sure before connecting. If you cannot tell the positive and negative poles from the size of the connector or the positive and negative polarity marks on the speaker unit, you can also hear whether the phases are connected correctly (the sound will be louder and crisper when connected correctly than when connected wrongly. ).

Regarding the connection of speaker wires, the common ones are gold and silver wires and red and black wires. The gold wire is connected to the positive plate of the speaker, which is the red terminal clip, and the silver wire is connected to the speaker (the negative terminal, which is the black terminal clip). If the positive If the negative pole is connected reversely, the sound quality will be seriously degraded.