Slater
Headphoneus Supremus
I wish my LG G6 let me select HIM manually. It selects automatically and the only IEM that triggers it for me was the Audio Technicia IM04. The T800's treble sounded quite harsh and with sibilant in normal mode that's why I sold it, though I don't recall the bass distorting for me.
This is the main reason why I never got one of the quad dac LG phones.
My personal preference would be to always use the HIM mode, but having to carry around an impedance adapter I had to plug in (for triggering HIM mode) every single time I wanted to listen to something would get very old.
What would have been a better idea IMO, is if LG had included a small toggle switch on the side (or next to the headphone jack etc) that would manually toggle the mode. Like the silent mode toggle switch on the side of an iPhone, for example.