It is becoming increasingly obvious that applying a transformer at every stage of an amplifier yields a great benefit in sound quality, provided off course the transformer in question is of an appropriate quality and design.

 

Replacing any coupling capacitor with a well designed and correctly matched driver or interstage transformer yields an almost shocking improvement in sound and should be tried to fully understand what a good wide-band transformer has to offer.

 

All copper / copper transformers have copper lead out wires, copper / silver have copper on the primary and Audio Note silver lead out wires on the secondary and  naturally silver all round.