convert it to a low impedance/low voltage signal source.
Like the transmission in your car.
The more it steps it down the more power but less speed.
The heavier duty the transmission the better
it can handle the power of the engine.
The heavier/bigger the core on the output transformer
the less likely it will complain when it is pushed hard.
The idea is to keep the transformer in it's comfort zone.
Everything works better in their comfort zone.
But the bigger the core the harder it is to be quick.
Smaller cars are quicker than the bigger cars.
Same in the world of transformers.
Also the bigger the core the more inductance it has so
it can go down lower than the smaller core ones.
It's all a trade-off.
The higher end transformers have "tricks" to get
the larger core transformers to be quicker so
that there is less of a compromise but at a cost.
As far as a 2 channel amp having 3 output transformers -
they don't, one is either a power transformer or PS choke.
DanL
