This is a stereo amplifier circuit diagram. The amplifier will produce stereo output channel with the power audio output can reach up to 70W for each channel. The amplifier built based great amplifier chip STA550 from STMicroelectronics. Take a note that this amplifier is a bridge amplifier, the speaker's terminal should not connected to the ground line.
Download STA550 Datasheet for your amplifier project reference.
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