A review I read about Futuresonics -
Future Sonics m8 Atrio with SofterWear custom fit sleeves
Future Sonics took a different tack for our test, offering up its high-end, off-the-rack Atrio headphone and adding its SofterWear custom fit in-ear sleeve. The add-ons are made of a very tactile rubber compound that takes a bit of work to get into your ear, but once in place they’re incredibly comfortable and sometimes equally tough to remove. Unlike any of the other makers in this test, Future Sonics headphones rely on actual dynamic speakers — miniature versions of the big booming banks of speakers at live events. The result is immediately noticeable. The sound is more natural and concert-like than any of the others in this test. The difference is particularly apparent in the bass range, where the FS sound feels warmer and rolls into your ear as opposed to the crisp and at times almost clinical sound of digital drivers.
WIRED The most naturalistic, warm, concert-like sound of the group. Very comfortable once you get them in your ear.