This is how to connect the amplifier module to the speaker, power supply and audio input. Diode bridge (rectifier) ​​of 15 Amps: 1.If the stereo channel, the amperage should be doubled. Transformer for the mono amplifier should be 35 + 35 volts AC with a minimum of 3 amps.Power Supply Circuit for 120W Power Amplifier Use mica between the transistor and the heatsink. The points are: prevent circuit shortage, use proper isolator and use thermal compound for maximum heat spreading to the heatsink. How to mount the transistors to the aluminium heatsink, see below image: potentiometer of 20K if you want to add volume control.Zener diodes between 20 and 24 volts : 1.10 Ω to (1W) – brown, black, black : 1.100nF (104) 100V nonpolar polyester capacitor : 2.470pF (471) nonpolar ceramic capacitor : 2.
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