The value of half of the power supply voltage, multiply it by yourself, and then divide it by the number of ohms of your horn, then the maximum output power is obtained,
However, I haven't done the power amplifier of TDA2030 chip. I have done the power amplifier of lm386 chip, and there has been sound distortion. Later, it was found that the input voltage was too large to be true. The front-end signal was divided by resistance, and the effect was OK.The maximum input offset voltage of TDA2030A is Positive and negative 22mV, the maximum input offset current is 200nA.Hope to help you.
