Do I need an amp for HiFiMAN he x4?
No you do not need an amp (as mentioned by others).
Does HiFiMAN make closed back headphones?
HiFiMAN has now released a closed-back version of the Sundara, bringing a new interpretation to its established sound. Does it offer a totally different experience for those who prefer closed-back headphones?
What is Massdrop?
Massdrop is a community driven commerce platform. What does that mean? In a nutshell, we (community members) decide on cool products (start a poll), vote for them, then Massdrop negotiates discounts for group buys (large purchase discount). This discount is then passed on to the community.