Class AB is a type of audio amplifier design that combines the features of both Class A and Class B amplifiers. It operates in a way that allows for high efficiency while maintaining good sound quality. In this design, the output transistors conduct for more than half of the input signal cycle, reducing distortion and improving linearity compared to Class B amplifiers. This amplifier type is commonly used in various audio applications, including home audio systems, musical instrument amplifiers, and public address systems. Class AB amplifiers are favored for their balance between performance and efficiency, making them suitable for both professional and consumer audio equipment.