1-Year Local Warranty.
Any mention of "us," "we," "our," etc is by Unique Melody, not AV One.
Awaken Sound. Illuminate Space.
Mason Asahi continues the legacy of the Mason line with a bold reimagining of space, structure, and sound. At its core is a next-generation 3D bone conduction system, developed to enhance spatial perception without physical vibration. Paired with twelve precision-tuned balanced armature drivers, Mason Asahi creates a listening environment that feels open, dimensional, and emotionally authentic.
UM 3D Bone Conduction Array.
Our UM 3D Bone Conduction Array positions a Triaxial Bone Conduction System along the X, Y, and Z planes, reconstructing sound like never before.
The result is:
- True-to-life spatial depth
- Enhanced imaging and positioning
- Vibration you can feel across your skull—not just your ears
With this three-axis layout, Mason Asahi simulates how sound moves in space, delivering a sense of presence that traditional bone conduction simply can’t.
Full-Spectrum Frequency Range, Full-Bodied Sound
Mason Asahi uses three bone conduction drivers, each tuned for a specific part of the frequency range. Working together, they contribute low-end weight, midrange presence, and extended treble detail.
- Bass is deeper and more textured
- Mids is clearer and more expressive
- Highs extends smoothly to 35 kHz
This multi-axis configuration allows bone conduction to contribute across the full bandwidth, supporting a more immersive and natural presentation, without altering tonal balance or introducing fatigue.
Twelve Balanced Armature Drivers. Six Paths. One Cohesive Tuning
A total of twelve balanced armature drivers are assigned across three bands for optimal performance:
- 4 low-frequency drivers for clean, weighted bass
- 4 midrange drivers for presence and smooth articulation
- 4 high-frequency drivers for detailed yet controlled treble
The six-way crossover ensures each driver operates in its ideal range, delivering speed, resolution, and tonal accuracy that stays balanced at all volumes.
Two Systems. One Seamless Experience.
Mason Asahi synergises air conduction and bone conduction into a single, seamless architecture.
This dual-path approach combines the soundstage layering and spaciousness with a natural presentation with bone conduction, and the precision and detail-retrieval of balanced armature drivers for an all-encompassing, realistic soundstage.
- Directional Bone Conduction improves imaging precision
- Multiple conduction points add subtle dynamic texture
- Improved coupling design enhances efficiency by over 2.3x compared to our previous bone conduction systems
- Spatial projection is expanded, offering wraparound width and front-to-back layering
The result is a more natural way of hearing. Immersive, accurate, and deeply engaging.
Materials That Match the Craft
The Mason Asahi shell is built from rare hardwoods and high-strength carbon fiber composite. These materials are pressed into shape through precision moulding, resulting in a design that is both functional and artistic.
The visual finish evokes the first light of dawn. Warm golden wood grain fades into woven carbon textures, blending organic and modern elements in a way that feels timeless and balanced.
It looks like sound. It feels like presence.
UM Fantasy Cable
Every Mason Asahi comes with the UM Fantasy custom cable.
- 26 AWG high-purity OCC copper
- Four-core construction, each with four layers of shielding
- PVC, nylon, and FEP insulation for flexibility and durability
The UM Fantasy is designed to preserve microdetail and eliminate unwanted interference. It pairs well with both neutral and resolving sources.
Two Signature Finishes
Black – Quiet strength, timeless minimalism
Gold – Warm elegance with a spark of boldness
Leather Case, Thoughtfully Made
The case is wrapped in Italian cowhide and lined with Indian goatskin suede.
- Outer shell in UM signature blue
- Inner suede in warm tea-brown, soft as morning fog
- Structured, protective, and tactilely refined
The case reflects the same values as the earphones it protects—durability, refinement, and quiet luxury.
Specifications
Drivers: 12 Balanced Armatures + 3 Bone Conduction
Bone Conduction Layout: X, Y, Z Triaxial Array
Crossover: 6-way
Sensitivity: 108dB @1kHz
Impedance: 21Ω
Frequency Range: 20Hz-35kHz
Connector: 0.78mm 2-pin
Cable: UM Fantasy, 26AWG, 4-core, multi-shielded
What’s Included
- Mason Asahi IEMs
- UM Fantasy Cable
- UM3 3135C Carry Case
- AZLA SednaEarfit Xelastec Eartips: SS / MS / M
- UM Blue Core Eartips: S / M / L
- Cleaning cloth, cable clip, spare mesh filters (x4), mesh pouches (x2), manual, warranty card
