Check that 8002 and the first pin are silent control, you can try to connect high level or ground; Your speaker is perfect for this amplifier; It is best to access the 5V power supply, the 7 pin is the negative power supply, and the 6 pin is the positive power supply; SP and SP- are connected to the horn, but can also be directly connected to the 8002 pin 5 and pin 8; The fourth pin is the audio input, but it is connected to a resistor and a capacitor, which you can find on the board.