NE5532 opamp on amplifier circuit
I'm not quite sure what you trying to achieving .. NE5532 has a unity gain on 10M, and drop from 1K frequency. https://www.onsemi.com/pub/Collateral/NE5532-D.PDF, page-5, top left graph. and phase margin around 10-15 degree on 10M.

That headphone are simple non-inverting amplifier, with some strange implementation. at first there is no 10 Megahertz you can apply on input as C3 would be effective short on that frequency.

R1 defined '0' potential, so power should be bipolar. And as it mention before a weird back-feeding loop.  it set as multiply by 2 on DC (R3, R4) and 5.5 on AC (R3, R2)

Finally,  a power output of NE5532 absolutely not enough for "headphone amplifier"