Four methods for distinguishing the polarity of the speaker

In the production, maintenance, purchase of speakers, to pay special attention to the positive and negative speakers. In the assembly speaker, if the "+" is reversed, the speaker will produce phase distortion.      

In the maintenance of speakers and speakers, often seen in the domestic and foreign manufacturers of speakers, the logo is not consistent. Here are four ways to determine the polarity of the speaker. First, with the 1.5V battery to touch the speaker's +, -, the low frequency speaker of the paper pot to promote large, high frequency speaker of the paper basin or shock membrane to promote a small number of. Battery "+" pole is connected to the "+" end, the paper bowl or the diaphragm to push up the battery "+" to the top of the speaker's "+" pole. The two is to use the pointer multimeter to touch the speaker "+, -" pole, cone push upward, the red pen is connected with one end of which is the speaker "-" pole, one end connected to the black pen speaker "+" very. Three is the presence of the repair and assembly of acoustic devices, you can determine the direction of the voice coil to determine its polarity, see figure. Clockwise around the head, the head is "+" pole, the tail is "-". Around the counter clockwise direction, the head is "-", the tail is "+". Four is the use of pointer multimeter DC 50 A profile in the speaker "+, -" pole, pressing the speaker cone, multimeter pointer clockwise swing, the red pen is connected at one end of the "-" pole, one end of the black probe connected to the "+" very. The multimeter to the pointer counterclockwise swing, one end connected to the red pen "+", is the black probe connected to the "-" pole.