With the LG V30 you can't just plug in a 3.5mm IEM. To get it to go into quad dac, high output, mode.....we have to 'trick' the LG V30, which is by using a 3.5mm adapter on the BGVP NS9 (whether onto the 3.5mm or 2.5mm) to get the V30 to go into quad dac mode. Once the phone is in quad dac mode it has plenty of power to run the NS9. In fact the NS9 sounds very good if done properly. If the NS9 is just plugged directly into the LG V30 3.5mm it sounds terrible. I'm listening right now to the BGVP NS9, connected properly, to the LG V30 and it sounds excellent. Bass is strong, mids very musical, female upper mid vocals very nice, treble not the most extended, but OK.