How to repair speakers?

　　Common solutions: (1) There is no sound. The cause of the fault: the speaker voice coil is blown; the speaker voice coil lead is open; the feeder is open; the connection with the amplifier is not properly connected. (2) The sound is low. The cause of the fault: the quality of the speaker is poor; the phase of the woofer is reversed. (3) Sound distortion Causes of failure: the speaker voice coil is skewed; the speaker core is deviated or there is debris in the magnetic gap; the speaker cone is deformed; the amplifier feeds too much power. (4) There is noise. The cause of the fault: the speaker cone is cracked; the speaker seam is cracked; the back panel of the speaker is loose; the speaker frame is not fixed tightly; the speaker surface net is too loose. (5) High frequency difference Causes of failure: bad high-frequency divider capacitor; bad tweeter unit; improper use of the screen. (6) Low frequency difference. Reasons for failure: bad crossover network; bad woofer unit. (7) Poor stereo effect. Cause: Improper placement of the speakers; incorrect connection of the two speakers.

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