QOA MistyBlue 2DD+2BA Hybrid Hifi Studio Audiophiles IEM

QoA MistyBlue — Hi-Fi Studio IEM (2DD + 2BA, 4-Way Hybrid)
Slogan: “Eternal Skyline” — from Eir Aoi’s debut hit MEMORIA

QoA × Eir Aoi — first artist deep-custom universal IEM. Exclusive tuning, hand-drawn artwork, and a sound palette inspired by a signature cocktail.

Design & Collaboration

Co-branded with Eir Aoi, MistyBlue seals indigo quicksand beneath a crystalline shell—flowing grains on the panel symbolize the river of time, while the deep blue evokes the boundless sky. Each earbud features hand-drawn art by the QoA team, turning the IEM into Eir Aoi’s personal “blue sky and mist”.

Tuning Concept — “Pure Blue’s Ultimate Voice”

MistyBlue blends mixology and acoustics: treble extends like citrus oils in Blue Curaçao; mids are juicy and resolving like pineapple and lemon; white rum lends a warm low-frequency wrap; a touch of vodka gives icy sub-bass reach. Notes layer like a cocktail—clear, bright melodies unfolding in a misty soundstage.

Driver System — 4 Units, 4-Way

Cable & Build

• OCC Silver-Plated Litz (four-strand hand-braid; 3×19×0.08 mm conductors per strand) with aluminum-alloy hardware.
• Detachable 0.78 mm 2-Pin sockets for easy upgrades and wireless adapter use.
• Replaceable Plugs: 3.5 mm SE and 4.4 mm balanced included.

Premium Ear Tips (Included)

• Purple Tips: Clear, forward vocals.
• Tri-color Tips: Balanced, all-round response.
• Transparent Tips: Larger stage and openness.

Technical Specifications

Accessories

• MistyBlue earphones ×1 pair
• Single-crystal copper silver-plated cable (0.78 mm 2-pin) ×1
• Replaceable plugs: 3.5 mm & 4.4 mm ×1 each
• Premium ear tips ×9 pairs (Purple / Tri-color / Transparent; multiple sizes)
• Leather storage bag ×1
• Cleaning cloth ×1
• Type-C → 3.5 mm audio adapter ×1
• User manual ×1

“MistyBlue” Cocktail (For Fun)

Specially crafted for Eir Aoi by senior bartenders, inspired by the MistyBlue sound.

• White rum 30–45 ml (optionally replace 15 ml with vodka)
• Blue Curaçao 10–15 ml
• Pineapple juice 45 ml · Lemon juice 15 ml · Syrup 15 ml (optional)
• Ice to taste · Garnish with a dried orange slice · Top with soda for a long serve

Note: Specs and accessories may vary slightly by batch. Images are for illustration; final appearance may differ due to the hand-drawn/hand-cast finish.