A newly developed 11.5 mm driver unit incorporating two sets of voice coils and magnets plus precut brass and aluminum alloy housing give a pure, high-resolution playback in the broad range from 4 Hz to 50,000 Hz. Canal earbuds with powerful playback properties for high-resolution sound sources which hold more information than a CD. The removable cord allows usage according to needs. The horn-type ear chip gives crystal clear sound and a firm fit.