How to increase the output current of a dual supply (virtual ground) circuit
any NPN + PNP that can handle the power dissipation with adequate current gain.

( in my simulation 1W with 4.5V @ 240 mA and so a 4W heatsink and part rated for same or more )


connect both bases to output and both emitters to your 0V bus.

then feedback from 0V to inverting input with R/2 to balance input offset voltage from Iin.


Verified with LM741 and 9V battery

Batteries all have ESR and tend to be noisy, so caps on input or feedback will reduce the noise.