KKmoon Digital Power Amplifier Board TPA3116D2 2x50W Class D DC12V 24V Dual Channel Audio Stereo AMP Adopts TPA3116 stereo audio power amplifier chip. Sound quality is very clear, strong amplifying power. Dual channel 2x50W, high efficiency and low-heat. Powered by DC 5-24V(best for 24V), wide input voltage. With reverse power supply protection and horn output short-circuit protection.