What class of amplifier is commonly referred to as a "switching amp"?

A "switching amp" is commonly referred to as a Class D amplifier. Class D amplifiers operate by rapidly switching on and off, which allows for high efficiency and lower heat generation compared to traditional Class A or Class B amplifiers. This switching action involves pulse width modulation (PWM) or other modulation techniques that dictate how the output transmits audio signals.

The efficiency of Class D amplifiers makes them ideal for applications where power conservation is crucial, such as in portable devices or large sound systems. Their design allows for smaller heat sinks and less power loss in the form of heat, differentiating them from the other classes of amplifiers that typically dissipate more energy.