The Avantone AV10 MHF is a replacement high-frequency driver for use with the original Yamaha NS10M monitors. Though these monitors are valued by many mixing engineers and producers, they've been discontinued for a while, and the supply of aftermarket replacement components has dwindled over the years. Thus, Avantone has reverse engineered the original high-frequency driver for the NS10M in a faithful manner, updating parts only to comply with modern-day RoHS requirements.