LM386是一种音频集成功放，具有自身功耗低、更新内链增益可调整、电源电压范围大、外接元件少和总谐波失真小等优点的功率放大器，广泛应用于录音机和收音机之中。-LM386 is an audio integrated amplifier, with its low power consumption, the update within the chain gain adjustable supply voltage range, fewer external components and total harmonic distortion power amplifier, etc., are widely used among recorders and radios.