The mono power amplifier module uses the AB/D class LTK5128 power amplifier IC, low EMI and low quiescent current, no external low-pass filter, and the efficiency is up to 90% in the D-type power amplifier mode mode. The LTK5128's unique DRC (Dynamic range) Control) Correction circuit technology reduces the distortion caused by waveform chopping when the high-power output is reduced. Compared with similar products, the dynamic response is better. With short circuit current protection, under voltage protection, over temperature protection.