M51513L is theaudio power amplifier IC. It uses 10-pin single in-line plastic package. The features of the two ICs are high voltage gain, large output power and they even work in 2O load. The power supply voltage is 9~16V. The output power is 5.8W(Typical), when the power supply voltage is 13.2V, load impedance is 4O and distortion is 10%. There are short-circuit protection, thermal cut off, power surge voltage protection etc. in the circuit. It is suitable for the audio power amplifier of car radio, car stereo installation