Please recommend headphones for music production mixing under £500

[l3xtown]

Headphone out is very wimpy.
Not enough for JT7.
just buy a headphone amp and connect that to the headphone out of the 16i16.

• Maximum Output Power
  57mW into 33Ω
  27mW into 300Ω
• Impedance11Ω

Should the headphone output impedance be higher or lower? In other words, is a sound card with a 50kOm output better than a sound card with a 11kOm output?

 

[staticV3]

Should the headphone output impedance be higher or lower? In other words, is a sound card with a 50kOm output better than a sound card with a 11kOm output?

Headphone output impedance should ideally be near 0Ω.

No headphone output has an impedance anywhere near 11 or 50 kΩ though. Did you mean 11/50Ω?