The AN5870K is an integrated circuit (IC) chip produced by Panasonic. It was designed to be a part of the AN5800 audio system. It is a dual amplifier IC that is used for output amplifiers for both the left and right channels. This chip is designed to be used in various audio applications such as car audio, home theater, multimedia PC audio and other systems. It has a variety of features such as low distortion, low noise, and low cost. It is capable of delivering up to 40 Watts of power and has a wide operating range. This chip is capable of working with various audio signals such as linear PCM, DTS and Dolby Digital. The AN5870K is a great choice for audio systems that require high quality audio performance.