How to trigger high impedance , normal, external mode on lg v60 with volume controller
first the earphone must be connected to the volume controller before plug in
1.high impedance mode: set the volume to 75% before plug in
2.normal mode : set the volume to 100% before plug in
3.external mode : set the volume to 0% before plug in
high impedance have the fullest volume ,external mode more volume than normal mode and normal is basic volume..you can also use this this method with any earphone,headphone that got volume controller built in