Yu9 Que Hybrid In-Ear Monitor
Self-developed 10mm dual-magnet dynamic driver with Knowles balanced armatures, four-way crossover. Silver 4.4mm in stock; 3.5mm and black made to order.
US$409View product
Yu9 Que · Hybrid in-ear monitor
Understated form.
Sound beyond its class.
1 dynamic driver plus 3 balanced armatures, a precise four-way crossover and a wave-pattern metal faceplate. 13 international professional reviews call it the giant killer of its price range.
US$409Shipping and import duties are shown at checkout
1DD + 3BAHybrid drivers per side, precise four-way crossover
9Ω · 126dBVery easy to drive, a phone or dongle is enough
20Hz to 50kHzFrequency response
13 reviewsInternational professional reviews listed on IEMRanking
Two in-ear monitors
Que is Yu9's first original flagship. Merqury is its limited finishing edition: the same body and tuning, with an uncoated faceplate, a four-strand cable and re-matched ear tips.
Yu9 Merqury Special Edition
Uncoated high-polish CNC faceplate, four-strand 7N single-crystal copper cable, DIVINUS VELVET ear tips. 399 units worldwide; all 5 units for Taiwan are sold out.
Sold outView product
MERQURY · SPECIAL EDITION
399 units worldwide.
Only 5 for Taiwan.
The finishing edition of Que. The body and tuning are unchanged, with an uncoated high-polish CNC faceplate, a four-strand 7N single-crystal copper plus graphene-plated cable and DIVINUS VELVET ear tips. Every unit is numbered.
399Worldwide limit
5Taiwan allocation
0Left, all sold out
Hidden where you cannot see
Yu9 believes good sound comes from an obsession with structure. Que uses a self-developed 10mm dual-magnet dynamic driver for solid, deep bass and three Knowles balanced armatures for detail and extension in the mids and highs. A precise four-way crossover splits the low, low-mid, upper-mid and super-high bands, bringing technology once reserved for flagships down to this price.
Care hidden in details you cannot hear
The two mid-range balanced armatures each have a modified rear chamber, removing the harsh metallic edge for soft, easy-listening vocals. The high-frequency armature uses a large-bore horn, and together with low-impedance crossover components and a physical notch filter, the treble extends openly without turning sharp.
Design
A complex 3D-printed resin shell and a wave-pattern metal faceplate. Production takes three to four times longer than comparable products. This is not a product of efficiency but of obsession.
Sound beyond its class, and not just in our words.
International professional reviewers and creators consistently rate Que highly. We write one key point per review; the full list is on the Que page.
Headphones.com · Precogvision
"My Favorite IEM Under $500"
Balanced tuning with a touch of warmth, and every instrument has its own clean space. The verdict: beyond its price class.
Headphones.com · Caleb Loo
Giant Killer
Layering and a clean background are the strengths, and the treble "adds vividness rather than constant sparkle".
Bilibili · 油兔几
Deep bass, sparkling treble, great fit
A measurement video covering frequency response, impedance and cable, from a creator with 210,000 followers.
ABOUT YU9
Yu9 is not a factory. It is one person.
"Yu" sounds like the Chinese word for fish, a playful self-given name. Starting with an ER4 recreation in 2017, Yu9 earned a better-known title in Chinese-speaking audiophile circles: the most famous ER4 recreator. Que is Yu9's first original answer.
Read the brand storyNot sure yet?
Talk to us first.
Que is especially sensitive to ear tips. Reviews that describe the mids as "vivid" or as "creamy" used different tips and different tracks. Rather than guessing from reviews, tell us what you listen to and we will help you choose.
How to order
Order online and pay with your card, Apple Pay or Google Pay. Shipping and import tax are included, and we ship from Taiwan with tracking.
Order now
Chat before you decide
Not sure about 4.4mm or 3.5mm, silver or black? Tell us your player and the music you listen to, and we will figure it out together.
LINE @soundessence server@soundessence.com.tw