50 Watt Power Audio Amplifier

Here the circuit diagram of 50W power amplifier. The amplifier uses a pair of power transistors that are MJ2955 and 2N3055 to amplify the input signal. You must use a heatsink on those transistors. The below design diagram uses for single input/output channel, just built two similar circuit to make it dual channel (stereo).

Schematic diagram:

50 Watt Power Amplifier circuit diagram

50 Watt Power Amplifier circuit diagram

PCB layout:

50 Watt Power Amplifier circuit diagram

Power Supply Circuit:

This amplifier require dual polarity output power supply (+, ground and -). Use this power supply circuit:

dual output power supply circuit diagram

Transformer: 3-5 Ampere, 24V secondary output
Diode: Diode bridge 5A or 4 piece of single diode 5A

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5 thoughts on “50 Watt Power Audio Amplifier

  1. platinynsiala

    vrement jai vous aime baucoups avec de bell schema

  2. baby cyka

    is it really 4,700uF for each capacitor in the power supply circuit?

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