That's the one. MC33078 sometimes is cheaper than NE5532. LM833 also if the numbers correct from memory. You could use BD139/140 and am opamp as your power amp. 1/4 amp standing current as class A+AB. Or AB without big heatsink. The transistors ideally higher gain examples.
But i have 5532 already, self's favourite one 😉
like this headphone amplifier? i have couple of design.
Attachments
Exactly what I thought. 5533 is fine. A slightly class A headphone amp is ideal to drive a power amp. It can do both jobs. If the heatsink is larger than usual simple diode and resistor bias is possible. Regulators to power rails if so.