The output stage operates at its maximum efficiency all the time.

What this means is that the output stage consists of two halves.

This can easily be obtained with small signal transistors in the output stage.

The output stage is only half the story however.

"There's been so much fuss about this one Teacher, but it is at the output stage."

A feedback loop including the output stage can be made using a simple integrator.

Clipping may occur due to limitations in the power supply or the output stage.

Then the sound travels to the mixer, the chorus, a filter and the output stage.

Some use the KT88/6550 beam power tubes in the output stage.

So the green dot gave it nine volts on the output stage.