For the standard emitter follower you typically need input coupling capacitors and a DC bias of roughly half the supply voltage however what if the input signal itself swings around half the supply voltage?
e.g if the previous stage to an emitter follower is a standard op amp non-inverting amp with a split supply (+12V,-12V) with the input referenced to centre point but the succeeding emitter follower is referenced to -12V (i.e +24V, 0V), so The op amp output is referenced to ''+12v'' relative to the emitter follower? Could this replace the input coupling cap and resistor biasing or would it not work?
Load would be a pair of headphones (50 to 300 ohm)
example of circuit is attached below