JponeI got mine yesterday. I've got Samsung Note 3 and at max level it's loud enough to be very uncomfortable, but I can imagine some very quiet recordings to be too quiet if you're into listening loud. However if you're not, then the seal will lower the listening volume requirements a lot. When connected to Sound Blaster E5, they can get pretty loud even at low gain settings.
Yeah, I was worried too, but they're really solid volume-wise.