The SONY MDR-EX800ST is a professional-grade canal-type earphone developed for stage use. It was jointly developed by Sony, which boasts the world's most advanced technology, and Sony Music Studio, which has extensive knowledge of the live performance world. In addition to high sound quality, the MDR-EX800ST is durable enough to handle even the hardest performances. Accurately reproduces the sound heard in the studioThe large-diameter 16mm dynamic driver unit delivers natural frequency response similar to that of recording studio monitor speakers, while the inner-ear design ensures artists a nimble performance. The superior resolution makes them ideal for monitoring.