Binary EP321 World's First MEMS Tribrid IEM - 2DD+3BA+MEMS Direct DriveBinary EP321 World's First Direct Drive MEMS Hybrid IEM Binary Audio breaks new ground with the EP321, the world's first in ear monitor featuring Direct Drive MEMS (Micro Electro Mechanical Systems) driver technology. This flagship tribrid IEM combines six precision engineered drivers per sidedual dynamic drivers, three balanced armatures, and one revolutionary MEMS driverto deliver unprecedented clarity, speed, and resolution across the entire