Original American Stereophone Company ,Ever since we invented the world's first SP/3 stereophone back in 1958, Koss Stereophones have been bringing back the excitement of a live performance. Music lovers around the world recognize that dedication to accuracy in sound reproduction as The Sound of Koss. , ,Koss KPH7 on ear headphones are a lightweight design that delivers the full power of the Sound of Koss. Deep bass production coupled with an extended frequency response from the integrated dynamic elements allow the KPH7s to lovingly deliver high-quality audio to the user’s ears through comfortable, soft ear cushions. Long-wearing comfort is further boosted by the adjustable headband, allowing the headphones to be custom fitted to any size head and prevented from continuously slipping off when active. , ,Being made for listeners on the move, the simple, contemporary design has a timeless quality that will not only fit well with today’s portable MP3 players, iPods and smartphones but also the next generation of technology. Ultra- portable, they can easily be tucked away inside a bag when not in use for convenient transportation, and all without any compromise to the Sound of Koss, a promise backed by the Koss limited lifetime warranty.