This is the best 2.1 home theater board kit with Bass and treble control. Input voltage 12-0 -12, Input current 1.5 to 3 amp, Power 100 Watt, Connect 2 speaker and 1 subwoofer. 2.1 board home theater board for replacement and project can be used for 2 channel satellite and one sub-woofer for use this circuit on full bass boost mode Home Audio Systems: The 2.1 amplifier board is commonly used in home audio systems to power speakers and a subwoofer. It allows you to connect various audio sources, such as TVs, gaming consoles, or music players, and enjoy enhanced sound quality with separate channels for stereo sound and low-frequency bass. DIY Speaker Projects: The 2.1 amplifier board is popular among DIY enthusiasts who want to build their own speaker systems. It provides a compact and convenient solution for powering stereo speakers and a subwoofer, allowing individuals to create customized audio setups according to their preferences. Car Audio Systems: In automotive audio setups, a 2.1 amplifier board can be used to power stereo speakers and a subwoofer in a car or other vehicles.