Sub-woofer power amplifier with self-diagnosis function

The utility model relates to an electronic product, in particular to a sub-woofer power amplifier with a self-diagnosis function. The sub-woofer power amplifier with the self-diagnosis function is characterized in that a single chip is connected with a power amplifier circuit, a volume control circuit is connected with a delayed processing circuit which is connected with a distortion suppression circuit, and the distortion suppression circuit is connected with a power amplifier partial circuit which is in connection with a speaker. According to the sub-woofer power amplifier with the self-diagnosis function, a self-recovery fuse is arranged at the position of a power source inlet to prevent an electric current of an input power source from being overlarge and damaging the power amplifier, meanwhile, a protecting device needs not to be replaced by a user, so that convenience is achieved. The problems that singles distorts and affects sound effects in a car after power amplification is conducted on an audio inp