I am currently looking out for a new headphone with a price limit of 200 $. As a closed back headphone I have the Audiotechnica ATH- M50X in mind and also the Sennheiser HD598CS. But I prefer the sound of open back headphones despite the disadvantages an open- back design has. As a open- back headphone I would definitely say that I prefer the Sennheiser HD6XX over anything else. But I only have 200$ and no amp. I would buy an amp some time later but I wanted to ask if my Samsung Galaxy S6 can drive those 300 ohm Headphones. Different sources on the internet have different statements. Linus from LinusTechTips says they run well on his iPhone, other Youtubers state you need an amp.