Dynamic driver
A 9 mm composite-diaphragm dynamic driver provides the foundation for low-frequency response, with bass weight and impact.
Bass foundation
*Sensitivity is specified as supplied. The reference input level has not been specified.
In stock! Ships within 1-2 business days.
1-Year Warranty

YU 羽 IEM - Purple
Four driver technologies. Detailed, balanced sound. Designed for music and gaming, YU combines Hi-Fi audio with an ergonomic in-ear design. Available in Black and Purple.

Four specialized drivers work together across the frequency range. Each is tuned for a distinct role, bringing bass, midrange, and high-frequency detail together in a balanced, cohesive presentation.
A 9 mm composite-diaphragm dynamic driver provides the foundation for low-frequency response, with bass weight and impact.
Bass foundationDedicated to the midrange, the balanced armature driver helps reproduce vocals and instruments with clarity and presence.
Midrange detailThe high-frequency planar magnetic driver contributes fine detail and transient definition to the upper range.
Treble detailThe piezoelectric ceramic driver complements the planar driver, contributing to the IEM's upper-frequency presentation.
Upper-frequency detail
A four-way crossover combines physical acoustic design with electronic filtering. Each driver is assigned to the frequency range that suits its strengths and tuned individually, for precise reproduction within each band and smooth, natural transitions across the spectrum.
Driver roles shown for illustration. This is not a measured frequency-response chart.
The CNC-machined metal faceplate features a feather-inspired motif and a laser-finished surface. Its colors and fine details shift subtly with the light and viewing angle, bringing the design to life.


High-precision 3D printing faithfully forms the complex internal geometry of each resin shell. The process supports a stable acoustic structure and close consistency between the left and right housings.
Smooth, skin-friendly resin feels gentle against the ear, helping keep longer listening sessions comfortable.
Shaped to follow the ear canal, YU’s angled in-ear design sits securely and creates a seal that helps reduce outside noise. Soft liquid-silicone ear tips cushion the fit, so you can stay focused through long listening sessions and intense matches.

An angled nozzle follows the direction of the ear canal for a close, secure fit.
Skin-friendly liquid silicone provides a soft seal and helps reduce pressure from extended wear.
A well-fitted ear tip helps block outside distractions and keeps your attention on the sound.
YU’s silver-plated oxygen-free copper cable is designed for faithful signal transmission and precise detail reproduction across the frequency range. Full bass, expressive vocals, and refined highs come together for immersive listening.

Two silver-plated oxygen-free copper cables come standard. With 0.78 mm 2-pin earphone connectors, you can switch between an analog listening setup and a USB-C connection with a detachable microphone.
The 1.2 m cable supports interchangeable 3.5 mm and 4.4 mm plugs for compatible audio outputs. This cable has no microphone.

The 1.7 m USB-C DSP cable uses four-strand silver-plated oxygen-free copper conductors. A detachable microphone adds voice chat and calls, with extra cable length for your setup.

Using a Harman target as a reference, YU is refined through frequency-response, phase, distortion, and listening evaluations. Bass, midrange, and treble are balanced for a smooth, coherent presentation.
Expressive vocals and a well-defined soundstage bring a natural sense of space to your music. Development testing uses a B&K 5128 head and torso simulator.
A smooth balance of bass, midrange, and treble.
Coordinating the four drivers for a cohesive sound.
Checking distortion as part of the tuning process.
Refining vocal expression, detail, and spatial presentation.

Powerful bass, quick transients, and clear detail serve both music and gaming. YU brings the same balanced foundation to your playlists, matches, and movies.
Full vocals, defined bass, and fine instrumental detail bring your favorite tracks into focus. The balanced tuning suits pop, rock, and anime and game soundtracks.
Quick transients and a defined sense of space help reveal footsteps, gunfire, and changes in distance, giving you useful audio cues as the match unfolds.
Clear dialogue, weighty effects, and layered soundtracks bring the scene to life, from quiet exchanges to the next burst of action.

Adjust EQ and microphone settings in the official web driver. The clean browser interface puts your audio controls in one place, with no desktop software to install.
Choose a Standard, Hi-Fi Music, Movie, or Game preset, or create and save your own EQ for the way you listen.
Web controls require a compatible YU USB-C DSP connection and a supported browser.