LG's smartphones were best known for their headphone jacks, thanks to the Quad DAC feature that set them apart from most of the competition.
10 things the LG V60 does well, and 5 things it doesn't - Android Authority
LG V30 review: A photography and videography dream - Android Authority
LG G6 - Wikipedia
Not working 32 Bit and 384 kHz on the LG G8X - Poweramp Bug Reports - Poweramp
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How to put V20 in high impedance mode without root : r/lgv20
More on the LG V30: High end audio, video creation, and security
LG G6 has upgraded Quad DAC over V20 : r/Android
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How to trick the Quad DAC: LG V40, LG V30, LG G7, and the LG G8
Android Authority on X: #lg G6 to have better audio than V20 thanks to upgraded Quad DAC / X
10 things the LG V60 does well, and 5 things it doesn't - Android Authority
Bluetooth headphones perform worse than wired models : r/Android