chebby said:
I understand 'discrete' (in this sense) to mean all separate components with no chips, or PCBs and everything individually wired/soldered like you see with some valve amps.
Something like this ...
It would be impossible to build the CXA60 this way because it would end up the size of a city if it's DAC was made from discrete switches!
The OP is obviously talking about some kind of dual-mono build (even though it only has one transformer).
In engineering terms, 'discrete' is used to describe systems that don't use integrated circuits. You can have discrete circuits with PCBs.
Integrated circuits (ICs) have more than one active device per package.
There was a school of thought that somehow having separate transistors allowed more control of the design and build of the amp. I am sceptical, there are real advantages in having active components share a chip.
However the OP may well mean something else.