This is a turbo bass circuit diagram. When we make the amplifier, we need this circuit diagram to make the turbo bass system. This is the circuit diagram.
we have to use 9-12 voltage for this circuit. and also need the center tap voltage. all component is written down in this circuit diagram. if any questions.
The backside of this circuit
This is the 150 watts amplifier circuit diagram using 2N3055 and MJ2955. We can use 35-0-35 voltage and 5 amperes. We can get the output to be 150 watts. It’s a mono board. For stereo, there is a dual circuit board. We can use another transistor. Here are the needed PNP and NPN transistors. Use another transistor following BCE.

This is a DIY car amplifier using 12 volt battery. HA1388 is a stereo audio power amplifier IC from Hitachi. This circuit can make a stereo mode 18+18 watts output. and in mono mode can make 35 watts of output. Here, use HA1388 12-pin audio IC. This circuit can run from 12 volts to 24 volts. dual (stereo) low-power audio amplifier. designed to drive small speakers. very common in vintage consumer electronics.

transistor circuit diagram of 2sa1943 and 2sc5200
Build a Transformer or construct the transformer. home theater circuit diagram 5.1
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