The Super.fi 3 Studio earphones give you studio-quality sound in a unique in-ear design that incorporates pro-style ear loops to keep your earphones in place and a universal fit kit. The super.fi 3 studio also seals your ear canal like the metro.fi 2 but it blocks even more noise because the internal speaker is different. The Super.fi 3 studio incorporates a proprietary balanced armature driver--the same technology found in hearing aids. Instead of pushing air to generate sound waves like your home speakers, a balanced armature is a coil that vibrates like a guitar sting. A balanced armature driver gives you distortion-free, full-range audio clarity while the in-ear design provides up to 26 dB of noise isolation for clearer sonic detail. The super.fi 3 series is a great introduction to true audiophile headphones for those who are looking to get more out of their portable player.