I am looking into building this stereo amplifier based on this circuit: 2 x 22 Amplifier
However, as I am pretty new to circuit building, I have a question about the ground lines: Do i tie all of the ground lines to the earth ground on the power supply? On the schematic, it shows +12v in, and out to "GND", and i am not sure if I should use the common ground line by itself as the end point, or if i should ground the common to earth. Any help would be great, and apologies if this is somewhat redundant, thanks!
Answer
The ground points should all be connected together, and to the negative terminal of the power supply. There is no need to connect them to "Earth Ground".
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