This is an original China 6 transistor 2:1 amplifier board designed for 100+50+50 watts. It features 2:1 audio amplification and is perfect for live sound and stage equipment. The energy rating of this board is 6 transistors, ensuring high-quality sound output. Its compact size makes it portable and easy to use. Whether you're a musician or a sound engineer, this amplifier board is a must-have for your audio setup.