It is a 4.1 home theater amp that compose of 5 speakers.(stereo front, stereo rear and subwoofer)

这是一款2.1声道的多媒体音响遥控接收电路原理图和源程序，主要用于家用的低音炮中。-This is a 2.1-channel multimedia audio remote control receiver circuit schematics and source code , mainly for household subwoofer .