Electronics Help Care electronics circuit diagram
Sound booster pre-amplifier circuit diagram:
This is the Sound booster pre-amplifier circuit diagram. This board is for boosting the sound. This board works as a pre-amplifier. This circuit runs with 12-0-12 voltage to 15-0-15 voltage. Every amplifier needs this type of circuit. Normally, it’s included with the bass tone circuit. Sometimes we need more sound than we have to use this circuit.
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It’s a stereo circuit. This board must be used before the audio input. The voltage should be dual: positive, negative, and ground. The audio will connect with the input, and the amplifier input will connect with the audio outputs.
Audio amplifier 2X300W using LM4702:
This is an audio amplifier 2X300W using an LM4702 IC. The IC is also used with two pairs of transistors to make 300+300-watt outputs. We can use 50-0-50 voltage to 85-0-85 voltage, depending on the IC. We can see the voltage listed in the diagram. Here also need transistors. PNP and NPN transistors are needed in this circuit diagram.
the diagram
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