The latest UIEM from 64 Audio is Duo, a hybrid dual-driver design. The Duo presents 64 Audio's signature balanced sound in a new way, with the complete Tia System, Apex Core, Wave Sync, and LID. It captures the listener's auditory senses and makes him/her forget they're even wearing IEMs at all.

64 Audio's complex faceplate assembly serves to protect the IEM shell while allowing air to flow freely. It also marks a major milestone in the evolution of 64 Audio's product design. The Duo is an elegant and timeless design reminiscent of open-back over-ear headphones.

Due to its lightweight feel, Duo is comfortable to listen to for long periods of time. When you are immersed in music, you feel simultaneously connected to your physical surroundings. You can put them on and lose yourself in their relaxed tonality. While maintaining air and sizzle, it presents a non-analytical top-end. There is no loss of bass with the open-air feeling as well as an unobstructed soundstage with impactful center imaging (unlike many other open back headphones). The Duo effortlessly delivers deep, rich low frequencies with ample sub bass.

A breakthrough technology that challenges traditional in-ear monitor designs to provide you with the absolute best listening experience.

Tia's complete system reduces unwanted resonance and distortion by allowing the 9mm Dynamic Driver and Tia High Driver to radiate freely into a single large bore without obstructions to the front of the drivers, thereby reducing undesirable resonance and distortion.

The Apex Core represents a deeper understanding of the air movement within an earphone. The faceplate of the Duo features a striking perforated grill, leaving the shell of the IEM exposed to the air. The outside atmosphere facilitates a less obstructed airflow resulting in an effortless reproduction of music with minimal physical fatigue.

Due to the high crossover point between the two drivers, Wave Sync was developed to ensure coherence; another industry first. We were able to introduce a crossover using a type of "all-pass" filter without changing the physical distance between the drivers by using an "all pass" filter.