eio
100+ Head-Fier
- Joined
- Mar 19, 2009
- Posts
- 331
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- 106
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...
from what i know, most chinese hifi smartphone manufacturers add a large (dozens of ohms) series resistor in the output path, to control the noise floor for low impedance loads, so they don't need to switch between low/high gain mode like LG does (by effectively pushing all loads into high gain mode).
that is an ugly stinking What solution, but everybody does it...maybe electrical damping is not as important for headphones as it is for large speakers? i'm not sure...do we have T/S parameters for headphone drivers?
other devices include a small series resistor for opamp stability.
the native output impedance of hifi codec/amp is quite low, i don't know the exact number but it is in the sub ohm range.