jagwap
1000+ Head-Fier
I have the 846 and interested to know the V20's output impedance. Dunno if that spec has been released anywhere. But highly doubt it'll be an ohm or less.
If apple can manage 0.7 ohm on the iPhone 7 adapter dongle, the ESS amp should be able to. But until someone measures it...
The gsmarena frequency plot suggests it is higher than the dongle, but less than the iPhone 6s 4.5ohm. But this is not a very accurate assumption.