Hello Left Turn_

As a rule, headphones with higher impedance require more power from the headphone output of their audio interface than headphones with lower impedance.

We therefore recommend using headphones with a maximum impedance of 200 ohms with all 'bus powered' interfaces (e.g. Scarlett Solo, 2i2 and 2i4).

For interfaces that have their own power supply (e.g. Scarlett 6i6, 18i8 and 18i20), headphones with a maximum impedance of 250 ohms can be used.

For all models of the Clarett (Thunderbolt and USB) and the Red (Thunderbolt) series, headphones with an impedance of up to 600 ohms can be used.