Speaker phase refers to the connection of the positive and negative poles when the speaker is used in series or in parallel: when using more than two speakers, try to ensure the consistency of the direction of the audio current flowing through the speaker, so that the cone of the speaker can vibrate. The direction is maintained so that the energy of the air vibration is not offset and the playback effect is not reduced. In order to do this, it is required that the positive pole of one speaker is connected to the negative pole of the other speaker in series when used in series; when used in parallel, the positive pole of each speaker is connected to the positive pole, and the negative pole is connected to the negative pole, that is to say Meet the requirements of the same phase.
However, some speakers do not indicate the positive and negative characters on their pins, which affects the use of series and parallel. For this reason, we must determine the positive and negative polarity of the speaker. The method is as follows:
1) Place the multimeter in the lowest gear of the DC current gear, connect the two test leads to the two pins of the speaker, then press the speaker cone gently and quickly with your finger, and watch the pointer swing direction of the multimeter in time, such as When the pointer is swung to the right, the red test pen is connected to the positive pole, and the black test pen is connected to the negative pole; if the pointer is swinged to the left, the red test pen is connected to the negative pole, and the black test lead is connected to the positive pole. Use the same method and polarity regulations to detect other speakers and mark them so that the positive and negative strings can be used in parallel to achieve the same phase.
2) Using one or two batteries (series), connect the positive and negative terminals of the battery to the two pins of the speaker. Pay attention to the vibration direction of the cone of the speaker when the power is turned on. If the cone is close to the magnet. Directional movement, at this time the negative pole of the battery is connected to the positive pole of the speaker. When the alternating battery turns on the two pins of the speaker and the paper cone moves outward, the positive pole of the battery contacts the positive pole of the speaker.