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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!

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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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  • \$\begingroup\$ Great, thank you. As a followup: in this case then, would a floating negative terminal be necessary for the circuit to function, or would it not make a difference? \$\endgroup\$ – ss808 Mar 21 '16 at 23:05

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