Why not a dual power supply? Or just two nine volt batteries rather than a potentially noisy and high impedance virtual ground?

I’ll make a dual in the future using the sigma25 dual design, two 9V batteries can be dangerous to headphones if I forget the amp running and that happens a lot.
The dual TLE2426 virtual ground I want to make doesn’t worry me much specially when used with the JRCs.
Anyway I already have a headphone amp so I’m making this one for fun so thats why it will be modular.