It will definitely be better to learn how to modify the car audio system through systematic training. Understanding its structure and principle will help you master the skills more skillfully. When refitting audio equipment, the power supply circuit must be independently connected from the original vehicle circuit system, and the special circuit of audio equipment should be separately connected with the battery, with fuses (fuses) in front and rear, and the wiring part must be protected with bushings to ensure the safety of the vehicle.