My guess is 47ohms. If you look at spec sheets they say 47ohms but don't specify if it's for unbalanced or balanced. But if you look at something like the G02 spec sheet they seperately state unbalanced as 47 ohm and balanced as 47 ohm.

- Fiddler (IMHO)

If you think listening to music is fun, try learning an instrument.
HT: G61RSL, 4x5K, 5.5KHC, 2xSC6000, Transporter, HD621, Philips BDP7501 4K, Tivo, 65" LG OLED 4K C6
Computer: Foobar2000, 5K, Mojo, HiFiMan HE1000 V2