EUIU UI-09
High-Fidelity Wired In-Ear Stage Monitor
- 1 DD + 8 BA hybrid driver configuration
- 10mm PU+LCP composite diaphragm dynamic driver
- 4 mid + 4 high custom balanced armature drivers
- 3-way crossover with independent acoustic tubes
- Micron-level 3D-printed skin-friendly resin housing
- Pure-physical micro-nano light-effect faceplate
- 6N silver-plated single crystal copper cables (3.5mm & 4.4mm)
- Wide compatibility for stage monitor and daily use
EUIU UI-09
Hybrid 1 DD + 8 BA Architecture with 3-Way Crossover
The EUiU UI-09 is a high-fidelity wired in-ear stage monitor featuring a hybrid architecture of 1 dynamic driver and 8 balanced armature drivers, totaling 9 drivers with a 3-way crossover. This configuration delivers a full-band, differentiated tuning that balances powerful deep bass, lush midrange, and airy highs. Designed for stage monitoring, professional listening, and daily commuting, the UI-09 reproduces the pure original sound with exceptional dynamic performance and precise detail, ensuring an immersive and fatigue-free listening experience.
Self-Developed 10mm Dynamic Driver with PU+LCP Diaphragm
At the heart of the UI-09 is a self-developed 10mm high-dynamic low-frequency dynamic driver. It uses an imported PU+LCP composite diaphragm, which combines the rigidity of LCP and the flexible damping of PU. This suppresses breakup vibration and reduces harmonic distortion, accurately restoring energy layers and spatial ambience within the low-frequency range. The result is powerful, deep bass with exceptional dynamic performance, providing a solid foundation for the entire frequency spectrum and delivering a natural, engaging low-end response.
Custom 4 Mid + 4 High Balanced Armature Drivers
The UI-09 incorporates 4 custom mid-range balanced armature drivers and 4 custom treble balanced armature drivers. These drivers feature a proprietary magnetic and armature structure, delivering lush midrange and airy highs. A high-precision RC electronic filter network finely segments the high, mid, and low frequency bands, while independent acoustic tubes for each band prevent acoustic interference between drivers. This ensures a cohesive, detailed sound with accurate separation and a natural tonal balance across all frequencies.
Micron-Level 3D-Printed Housing & Pure-Physical Faceplate
Deeply co-developed by EUiU and HEYGEARS, the UI-09 features a micron-level high-precision 3D-printed housing. Integrated printing of acoustic tubes and driver slots eliminates assembly tolerances, ensuring consistent performance. Made of skin-friendly resin, the lightweight housing contours snugly to the auricle, distributing wearing pressure for long-lasting comfort. The faceplate reinvents the language of light through pure physical micro-nano structures, using diffraction and interference to create an immersive naked-eye 3D light-and-shadow effect without a single drop of chemical pigment.
6N Silver-Plated Single Crystal Copper Cables
The UI-09 comes with two high-quality cables. The 3.5mm single-ended stock cable is constructed with 6N silver-plated single crystal copper and silver foil composite conductors, featuring 4-strand cross precision braiding and a soft, skin-friendly jacket that effectively suppresses microphonics. The 4.4mm balanced cable uses 6N silver-plated single crystal copper with an 8-strand cross braided structure, reducing signal transmission loss and delivering an expansive soundstage with clean, transparent resolution. Both cables unlock the earphone's native audiophile sound potential.
Specifications, Packaging & Customization
The UI-09 offers a sensitivity of 109dB SPL at 1kHz, an impedance of 18 Ohm, and a frequency range of 20Hz to 20KHz. It features a 0.78mm 2-pin cable interface and supports both 3.5mm and 4.4mm plugs. The package includes the UI-09 earphones, both cables, silicone eartips in various sizes, a silicone tip storage case, and a portable leather storage case. EUiU also offers standard color customization through a selection of colors, patterns, and faceplate materials from the provided swatches.
Technical Details
EUiU UI-09 L&R ×1
Silicone Tip Storage Case ×2
Portable Leather Storage Case ×1
Silicone Eartips S/M/L ×24
3.5mm Audio Cable ×1
4.4mm Balanced Audio Cable ×1
