Surround Yourself With Sound From Three Channel Audio Amplifier

The Three Channel Audio Amplifier project processes incoming audio signals to drive three separate loudspeakers (LS1, LS2, and LS3) using dual TEA2025 integrated circuits (IC1 and IC2). Power is supplied to the circuit via a step-down transformer (9V rms, 3A secondary) paired with a bridge rectifier (BR1) or 1N540X diodes to convert AC voltage into the DC supply required by the amplifier chips. Various resistors and capacitors are integrated into the circuit to handle signal coupling, power supply filtering, and frequency stabilization, ensuring stable audio reproduction without excessive noise or distortion. Three 100k-ohm potentiometers (VR1 through VR3) act as adjustable voltage dividers, allowing users to manually control the volume levels or balance across the different channels. Finally, three LEDs (LED1, LED2, LED3) are included in the layout to provide visual feedback indicating when the amplifier circuit is powered on and active. Two of the amplifier channels handle traditional stereo left and right audio playback through LS1 and LS2, while the third channel serves as a summary or subwoofer channel driving LS3, rounding out a multi-speaker listening setup.