This present here is a 20Watts mono and 10Watt Car Stereo Amplifier circuit using IC TDA2004.
The TDA2004 is a class B dual audio power amplifier in MULTIWATT [package Designed specifically for car radio applications. TDA2004 has low noise, low distortion, and robust. The robustness is supported by its operation safety protection features: very inductive loads, load dump voltage surge, overheating, the output AC-ground short, fortuitous open ground. Other Important Things is space and cost saving: very low external components counts, and very simple mounting system with no need for electrical isolation Between the package and the heat sink Because the heat contact metal of the package is already connected to ground.