They don't need to be closed. I use them to sing over instrumental tracks, to study (i'm a vocalist), they don't have to be portable. I do have a headphone preamp but a cheap one.

Hello!   I'm new to this forum, I need some headphones for singing (i'm a lead vocalist) and I use to study with headphones. For the moment I have a pair of Sony MDR-V700DJ and I am not very impresed with them. I need something much better regardless of price. What are the best headphones I...