The Mackie MP-120 are single dynamic driver in-ear headphones designed to provide enhanced sound isolation and full-range frequency reproduction for musicians, vocalists, and audio engineers in studio recording sessions and live stage applications. The high-performance single dynamic driver in each headphone yields a frequency response of 20 Hz to 20 kHz with an emphasis on balance across the frequency spectrum. The headphones feature a low-profile design utilizing molded enclosures for an ergonomic fit and up to 40 dB of noise isolation.