About how many ohms can move Hiby R4

Good morning, I’m new to this and I need your help. If a fiio m11 can move headphones with up to 300 ohms according to the page, how many ohms can the Hiby R4 move?

Is there a formula to find out?

For your reading and calculating pleasure - one needs to know more than resistance in Ohms ( Ω). Sensitivity is just as important to calculate how much power in Watts (W) is required to reach the desired volume in decibels (dB).