The FitEar ToGo 334 ‘universal’ IEM from renowned custom IEM maker FitEar. Based in a small workshop in Tokyo Japan, FitEar crafts each IEM by hand to the very highest standards. The ToGo 334 is comprised of a 3 way system with 3 units and 4 total drivers. A driver for the low frequency, low and mid frequency and high frequency make for an unmatched sonic presentation. The ToGo 334 delivers a soundstage unlike any other IEM, both open and natural.