Product advantages and features of Class AB Loudspeaker Amplifier

1. Balance between efficiency and sound quality
Class AB Loudspeaker Amplifier combines the working modes of Class A and Class B. When there is no signal or a small signal, the output transistor remains in a slightly conductive state (similar to Class A) to reduce crossover distortion; and switches to Class B mode when there is a large signal to improve efficiency. Its efficiency can usually reach 50%-70%, which is significantly higher than Class A (20%-30%). Distortion control By introducing a small bias current, Class AB amplifiers effectively reduce the obvious crossover distortion problem in Class B amplifiers.

2. Structure and working principle
Class AB Loudspeaker Amplifier adopts a dual-transistor complementary push-pull structure. The positive and negative half-cycle signals are amplified by different transistors respectively, avoiding the high energy consumption problem of continuous conduction of a single tube, while optimizing the signal linearity.
When a small signal is input, the transistor works in Class A mode to ensure low distortion; when a large signal is input, it automatically switches to Class B mode to improve efficiency. This dynamic adjustment allows it to adapt to the needs of different loads and signal strengths.

3. Wide application scenarios
Class AB Loudspeaker Amplifier is widely used in home theaters, professional audio systems and car audio due to its low distortion and high linearity, especially for scenes with high sound quality requirements. Compared with the high-frequency noise problem of Class D amplifiers, Class AB amplifiers are stable at medium and high power outputs (such as 30W-200W), and are suitable for driving high-sensitivity speakers.