This is Amplifier for Car Audio.

1. Class A Amplifiers: These amplifiers have a single active device (transistor or tube) that conducts continuously, ensuring the highest linearity and low distortion. However, they are less efficient and generate significant heat.

2. Class AB Amplifiers: Class AB amplifiers combine elements of Class A and Class B amplifiers. They use two active devices: one conducts during positive voltage swings, and the other conducts during negative voltage swings. This configuration improves efficiency while maintaining good linearity.

3. Class D Amplifiers: Also known as switching amplifiers, Class D amplifiers use pulse-width modulation (PWM) techniques to switch the output devices on and off rapidly. This design results in high efficiency and low power dissipation but may introduce some distortion.

Notes about installation and pin number description of Power IC (IC301: PA2032A).