The Magni 3+ is rated at 0.2 ohm OI
The Fiio M11 Pro is rated on 3.5mm output at 1.1. ohm OI
Okay cool, they’re both quite low. Sony doesn’t publish their Zout but I think it’s been mentioned in their respective threads that the WM1Z is around 0.8 ohm and the TA-ZH1ES around 5 ohm