This is an amplifier circuit that is formed from a transistor amplifier miraculous. This circuit is used in the speaker subwoofer with 300W maximum power on each side. To apply it, can be used in the room that is not too large, like the car. And the voltage needed between 25 to 42 Volt DC. 300W Subwoofer Power Amplifier Searches related to 300W Subwoofer Power Amplifier 200w subwoofer amplifier circuit diagram subwoofer circuit diagram free download 300w subwoofer amplifier circuit diagram low pass subwoofer circuit diagram 12v subwoofer circuit diagram 500w audio amplifier circuit diagram pdf subwoofer circuit diagram pdf 500w power amplifier circuit diagram datasheet