Speaker Phase Judgment

Speaker phase refers to the connection method of the positive and negative poles of the speaker when it is used in series or 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 vibration direction of the speaker cone can be kept consistent, so as not to offset the energy of air vibration and reduce the playback effect. In order to achieve this requirement, it is required that when used in series, the positive pole of one speaker is connected to the negative pole of another speaker in sequence; 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, which means that the same phase requirement is achieved.
However, some speakers do not have the words positive and negative on their pins, which affects the use of series and parallel connection. For this reason, we need to determine the positive and negative polarity of the speaker. The method is as follows:
1: Set the multimeter to the lowest DC current range, connect the two test leads to the two pins of the speaker respectively, then press the speaker's cone lightly and quickly with your fingers, and observe the swing direction of the multimeter pointer in time. If the pointer swings to the right, the red test lead is connected to the positive pole and the black test lead is connected to the negative pole; if the pointer swings to the left, the red test lead 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 well. In this way, the same phase can be achieved after using the positive and negative poles in series or parallel.
2: Use one or two batteries (in series), connect the positive and negative poles of the battery to the two pins of the speaker respectively, and pay attention to observe the vibration direction of the speaker's cone in time when the power is turned on. If the cone moves in the direction close to the magnet, the negative pole of the battery is connected to the positive pin of the speaker. Alternately connect the battery to the two pins of the speaker, and the cone moves outward, which means that the positive pole of the battery is in contact with the positive pole of the speaker.
Types and working principles of speakers
There are many types of speakers used in 2014. According to their working principles, they can be divided into electromagnetic, electric, piezoelectric, electrostatic, ionic, airflow conversion, airflow modulation, etc. However, the speakers used for playback in high-fidelity systems in 2014 are mainly electric speakers. Speakers are still the weakest link in high-fidelity playback systems. Therefore, if you want to get good playback effects, it is very important to know how to choose speakers. If you want to choose the right speakers, you need to know the working principles of various speakers.