"XZ8403F is a 3W Filter-Free Class-D stereo audio power amplifier to provide high-quality sound. 
 Low-EMI PWM modulation circuit mode, so eliminating the need for conventional Class D amplifier, low pass filter and direct drive Young 
 Sound device, saving system cost and PCB space. Than class AB power amplifier with higher efficiency, 
 So you can extend the battery life is ideal for portable applications. "