To get more mounting options I decided to put output power MOSFETs on their own tiny boards together with their source and gate resistors. So they have their own power rails. Is it necessary to decouple them too (and route return paths to the star grounding point)? The driver board has its own decoupling obviously.
Side note: those MOSFETs are gain (pure transconductance, not followers) devices actually similar to Hiraga's amp, Pass's amps and many others.
Side note: those MOSFETs are gain (pure transconductance, not followers) devices actually similar to Hiraga's amp, Pass's amps and many others.