Duo feels exceptionally lightweight and ergonomic, keeping your ears relaxed even during extended listening sessions. This design allows you to stay aware of your surroundings while being fully immersed in music. Its relaxed tonal character makes it easy to put on and get lost in, providing a non-analytical top-end that retains breath, sizzle, and musical expression.

The expansive open-air sensation supports a wide, unobstructed soundstage with impressive mid-range imaging, delivering a transparent listening experience rarely found in in-ear monitors. Duo also effortlessly produces deep, rich low frequencies with impactful sub-bass and no loss of punch.

The Duo project was conceived shortly after the release of 64 Audio’s Trio, a three-driver tubeless hybrid IEM. The goal was to create a two-driver UIEM featuring the full Tia System, while exceeding expectations for open-back sound in an in-ear form factor. The result is a design that combines the intimacy of IEMs with the spaciousness of open-back headphones, setting a new standard in hybrid audio performance.

The Duo’s complex faceplate assembly not only protects the shell but also allows air to flow freely, enhancing the open-back listening experience. The sleek and elegant design draws inspiration from open-back over-ear headphones, blending visual sophistication with acoustic performance.

The 64 Audio Duo offers a light and open listening experience, keeping your ears relaxed over long sessions while remaining connected to your environment. Its relaxed tonal balance presents a non-analytical top-end, preserving air, sizzle, and musical nuances. The expansive soundstage delivers unobstructed imaging, impactful center placement, and full-range depth. Duo’s low-frequency response is deep, rich, and detailed, with sub-bass that supports a powerful, immersive sound without sacrificing clarity.

WEIGHT

500 g/piece

CABLE

Black Premium: Silver Plated OCC Copper Wire

SENSIBILITY

98 dB/mW