Help in amplifier grounding

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Hello,

I'm building a gainclone amp and have already the schematic design ready to make the PCB:

Schematic.png


https://lh3.googleusercontent.com/-uF1Il60GZPo/Ub0OObAh4-I/AAAAAAAAACk/ChAxZBtwEic/w773-h553-no/Schematic.png

but don't know how to deal with the grounds, if it's better to use star grounding or ground plane, and if should I take the entire system (amp supply, OPAMP supply and gainclone amp) together with only one ground or with separate grounds and how to design it in the PCB. Please if someone knows about this topic I would appreciate any advices about it.

Santiago.
 
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