Excellent performance portable amplifier

It includes two channels of microphone input and line input. The power amplifier part adopts the audio power amplifier integrated circuit TD A15
19t introduced by Philips . This circuit has a wide operating power supply voltage range, high gain, large output power, low distortion, and few peripheral components. Features. It also has load short circuit, open circuit, overheating and other protection functions. The excellent performance of TD A15 19 determines the superiority of the amplifier. S in the picture is the squelch control switch of the amplifier; the rectifier 1N5404 is set up to prevent the battery from being reversely connected and burning the integrated circuit. The speaker of the amplifier is required to be no less than low to give full play to its high power. The heat sink plate of the integrated circuit must have sufficient area to ensure that     it can work normally under any conditions. The circuit of the amplifier is very simple to make and the assembly and welding are correct. , can be used without debugging.