I have the lg g7 (European variant) and i found the volume pretty low even in high impedance mode. I tested it with a pair of Sennheiser hd 600 and one Sennheiser hd 660s. The 660s goes loud but i wouldn't say extremely loud and the 600 are not loud enough even at max volume. I was wondering this is a problem with limitted volume on Euopean variants? Becuase i read people saying they can't go to max volume because it gets too loud even with hd 800 (with quad dac off there are bassically whispers but i am not enough pleased with quad dac volume though). Is root going to help or other method, or I have to buy an US variant?