QoA x Eir Aoi Misty Blue 4-Driver (2BA+2DD) Hybrid In-Ear Earphone

QoA 2DD+2BA Quad-Driver Headphones, Eir Aoi Collaboration Model
QoA Misty Blue Product Overview

Background Story
The name "MisytyBlue" frequently appears on bar menus around the world, but its true origin remains unknown and undocumented.
The QoA team collaborated with Eir Aoi and top bartenders to create a brand new signature drink for her, while also working to create an IEM that her fans can enjoy.

design
These unique in-ear headphones, with their indigo sand-colored shells, capture the essence of Alquix's sound. In collaboration with the QoA design team, the flowing sand color symbolizes time, while the deep blue represents the vast sky.
Like stardust frozen in light, it leads listeners into a musical world where beauty remains eternal in this ever-changing world.

Four-way frequency divider, 4 units
A 10mm dynamic driver paired with a 6μm PET dynamic driver delivers powerful bass.
The QoA's slim yet powerful 6μm PET dynamic driver delivers deep, clear, and powerful bass. A special voice coil reduces distortion, and the suspended design maintains smooth, nuanced bass even during sudden drops in electronic music.

8mm titanium-coated PET dynamic driver unit, creating a midrange sound
The QoA custom 8mm PET dynamic driver features a titanium coating, achieving a perfect balance between strength and flexibility, delivering crystal-clear midrange. It reproduces smooth, natural vocals, capturing every detail of the singer's voice. The titanium coating reduces harshness, ensuring clear and accurate piano notes and guitar string tones.

One custom QoA BA dynamic driver unit creates mid-high frequencies.
This QoA dynamic driver is specifically tuned for mid-to-high frequencies, delivering a clear and pure sound. Its rapid response accurately captures the flickering of cymbals and the overtones of violins.

One Knowles high-frequency and ultra-high-frequency BA unit
The Knowles driver features a metal diaphragm and extremely high resolution. Tuned by QoA, this driver effectively suppresses hissing and harshness while maintaining a clear and transparent sound. The violin's overtones extend smoothly, as softly as moonlight filtering through polished silver.

Tuning Concepts
Inspired by the pure blues sound of bartending
The QoA team collaborated closely with Eir Aoi, infusing the art of cocktails into the acoustic design. The high frequencies sparkle with the citrus aroma of blue curacao, the midrange is full like a blend of pineapple and lemon juice, and the low frequencies are smooth and warm like white rum. A touch of vodka adds clarity and depth, like ice. Each note floats like a layered cocktail ingredient, bringing clear, vibrant melodies to a misty soundscape.