NBA401 1600W Peak (800W) RMS N-Series Class A/B 4-Channel Amplifier The NVX NBA401 is categorized as a Class A/B amplifier.

This class of amplifiers combines the high efficiency of a class A amplifier and lower distortion found in class B amplifiers.

The class AB amplifier acts more similarly to a class A amplifier by biasing both transistors so they become active when the signal is close to zero.

As the signal excursion increases into a larger waveform, only one transistor remains active, a primary function found in class B amplifiers.

These features combined with the MOSFET transistor allow the NBA401 to be one of the most efficient and reliable amplifiers on the market.