This chart is not quite correct for the V10 and V20. The headphone out detects the impedance of what is plugged in and adjusts the amplifier gain to match it. Low impedance headphones get 0.45V rms, high impedance headphones get 1.8V rms (underpowered? Really?), and the above corresponds to detecting a line in where it gives 0.99V rms.
"Smart"phone for audio.
This is relevant. Would you please inform about your source for this information?
It is correct that the phone will detect three different things automatically. It is autodiscovered, then displayed in the settings:
1. a low impedance headphone
2. a high impedance headphone (+50Ohm)
3. an aux input on a preamplifier, i.e. the lg V10 entering a kind of "wireless DAC" mode.
In addition comes the normal low quality DAC integrated on the processor, said to be similar in audio quality to the most expensive iPhones, but here we talk about hifi, and this is truly what is granted by the ESS Sabre 9018 extra DAC and ditto amplifier
I returned a Dragonfly red with the 9016 little brother DAC, because I found LG V10 better sounding. More "black" as we say in HighFidelity circles. I also immediately sold my Fii e17 DAC for the same reason, but these are remarks based on personal opinion, back to the LG v10:
This auto-detect solution is intelligent and user friendly, but there is a severe bug here, because only the built in LG media player in active state will cause 2 to hit in and grant full volume. If you connect Tidal, Spotify, USB media player pro, or probably whatever, you get the 1 volume level, also when connecting a high impedance headphone. The volume 1 level is much lower than the 2 volume level. MUCH LOWER.
LG developers, if your read this, this is dangerous for the case when you switch from Tidal to native media player because the volume increase dramatically without warning. In consequence, damage to your hearing faculty is the worst possible outcome. For your serious consideration, not only because there are now overprotective EU regulations with the intention to prevent hearing loss. You can see this in the form "volume has been lowered automatically for your protection" type of messages on many operating systems, not only Android.
The remedy is the app: "HiFi everywhere DAC fix", which sole purpose seems to be to grant "high volume" and thus, equal volume to all installed media players. This solves the problem because the surprise change in volume level is now gone.
LG developers again: Keep the high volume gain solution (2). Do not lower the max level to (1), because this is really a few steps too low.
When this bug is fixed, the LG V10 (and perhaps subsequent models like the v20?) will be perfect. I can use LG V10 on the go as a premium quality playback unit, as a lower quality on the go unit when using lower impedance earplugs, as a wireless DAC in my home environment, and more. What a steal..
Note: There is discussion about heat problems above. My H960 variant is totally cool regardless of charging or not, and regardless of usage, however I do not play games.