Because I want 'clean', neither GAIN nor MASTER are ever above 'noon'. Usually 10 or less.Each gain stage has a purpose determined by the designer. The design depends on a lot of things such as: whether they want things clean, mildly overdriven, or distorted; what range of input they expect; what they want the stage eq to look like. For starters.

....hey, don't blame me, I know the explanation's good cause Donnie got it....