64 Audio Duo is a two driver hybrid universal in-ear monitor (UIEM). Following Trió and Fourté, Duo is another fully tubeless design in our product range, with the added benefit of being one of the worlds only semi-open back UIEMs. Built with the complete Tia System, Apex Core, Wave Sync, and LID, Duo presents 64 Audio’s signature balanced sound in a whole new way. The simple audio design captures the listener’s auditory senses while forgetting they’re wearing IEMs in the first place.
Duo feels light, leaving your ears feeling open and relaxed even for long listening periods. You feel simultaneously connected to your physical surroundings while you’re enveloped by music. Relaxed tonality lets you put them on and get lost. It’s able to present a non-analytical top-end while retaining air and sizzle. The vast open air sensation supports an unobstructed soundstage with impactful center imaging (unlike many other open back headphones) as well as no loss of bass. Duo effortlessly produces deep and rich low frequencies with plenty of sub bass.
The complex faceplate assembly not only serves an important role in protecting the shell of the IEM while allowing air to flow freely, it is also a major step in 64 Audio’s product design evolution. Duo is a timeless and elegant design reminiscent of open-back over-ear headphones.
Exclusive technologies that challenge traditional in-ear monitor designs to give you the absolute best listening experience
Tia – A tubeless design that reduces resonance for a transparent and lifelike sound signature.
Apex Core – Apex Core is a deeper understanding of air movement within an earphone system.
Wave Sync – Due to the high crossover point between the two drivers, Wave Sync was developed to ensure coherence