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 tot