The TDA7388 is a 4-channel power amplifier IC that can output: 4 x 26 W of power (test adjustment: 4 Ohm load; 14.4V power supply; The frequency is 1 kHz; The distortion degree is 10%), which is not directly related to the frequency division, but can be connected to the treble and bass horn through the frequency division when connecting the horn; This IC is generally used to push the full horn directly, or to push the tweeter and subwoofer separately through the split frequency divider.