PCB 800W Power Amplifier circuit

Electronics Help Care September 12, 2025 Amplifier Diagram

This is the PCB 800W Power Amplifier circuit diagram. This diagram can make a maximum of 800 watts using MJ transistors. And 2sa/2sc can make 300 watts maximum. It’s a mono diagram. Here needs dual voltage. positive, negative, and ground voltage. Here can be used maximum 60-0-60 voltage.

Speaker protection circuit diagram for amplifier:

This is the speaker protection circuit diagram for the amplifier. Every amplifier needs this circuit to protect the speaker. When the amplifier makes a problem, then the voltage comes out from the speaker line. And the voltage burns the speaker. For this, we need this circuit to protect the speaker. This circuit needs a 12-0-12 voltage to run.

Speaker protection circuit diagram for amplifier

This is the Speaker protection circuit diagram. It can protect our Speaker from burns. If the amplifier has any problems, this circuit can save our soundbox. Normally, when the transistor makes a short circuit, the voltage comes out from the speaker output line, and this circuit protects that voltage. This circuit should not allow direct voltage to be sent to the speaker. This circuit is essential for protecting the speaker.

This is a 2n3055 amplifier circuit diagram for 200 watts. Here, PNP and NPN transistors 2n3055 and MJ2955 are used. Both are metal transistors. Complementary Silicon Power Transistors. This transistor is a 15-ampere power transistor with supplementary silicon 60 volts, 115 watts. Here in this amplifier circuit, we are using 35-0-35 volts and 6 amperes. The 2n3055 transistor is an NPN transistor, and the MJ2955 is a PNP transistor.

We know that Voltage X amperes= Watts. So, 35X6=210 Watts. So our amplifier should be 210 Watts. But it’s a mono amplifier. If we want to make a stereo amplifier, then we have to use 2 circuits: one for the right channel and another for the left channel.