A Class B amplifier is a type of electronic amplifier that uses two active devices, typically transistors, to amplify an audio signal. Each transistor conducts for half of the input signal cycle, allowing for efficient power usage and reduced heat generation compared to other amplifier classes. This design helps achieve a good balance between sound quality and energy efficiency. In a Class B amplifier, one transistor amplifies the positive half of the waveform, while the other handles the negative half. This push-pull configuration minimizes distortion and improves overall performance, making it suitable for various applications, including audio systems and musical instruments.