تماشای ویدئو Test Power Amplifier 400W 2SC5200 2SA1943 از آی-ویدئو
Video test Power Amplifier 400W driver, Power Supply 58V 5A 12 Inch subwoofer speaker.
Circuit Diagram and PCB Layout: https://www.elcircuit.com/2018/01/power-amplifier-400w-audio-circuit.html