U9 | Sound Engineer's Soulmate
Universal 9 Driver Hybrid In-Ear Monitors
- Designed for extreme detail, precision and clarity
- Ultimate studio In-Ear Monitors
- In-built hearing protection Klarity Valve© for all-day listening
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Other Stealth Sonics In-Ear Monitors
Custom Options Available
For those chasing sonic perfection, the U9 is available as the C9 Custom In-Ear Monitors.
Achieve up to -36dB with an absolute seal, translating into the best possible isolation and sound reproduction from our In-Ear Monitors.
Have it your way, however you want it.
Reviews and Endorsements
Warren Huart
Multi-Platinum Producer
Aerosmith, The Fray, Transformers
Marc Urselli
Grammy-Winning Engineer
U2, Elton John, Joan Jett
Jeff Stinco
Guitarist
Simple Plan
Charlie Benante
Drummer
Anthrax
Tuned For Extreme Precision
Deep bass response, beautifully transparent mid-range, crystal clear open highs with an immersive soundstage.
Free Your Ears
At only 4 grams per side, experience ultralight comfort with the lightest IEMs ever.
Made By Professionals, For Professionals
Designed with inputs from renowned audio engineers and musicians around the world over many months.
Reduced Ear Fatigue
Listen all day with our proprietary designed in-built pressure relief Klarity Valve©.
Technology inside the U9
Click on the icons to learn more.
Superior Listening Experience
Featuring our widest frequency range, touted as one notable audiophile saying that it will allow the wearer to "hear dolphins serenading canines on the beach." The sound signature is supported by a deep bass response, beautifully transparent mid-range, crystal clear open highs that are powered by four super-high drivers. The U9 delivers an immersive soundstage to round out a truly superior listening experience.
Packed With Technology
At only 4.16 grams a side, the U9 is deceivingly light yet packed with proprietary innovations stemming from Audiology and Aerospace, to allow for the best listening experience, reduced ear fatigue, soft touch comfort, amongst other In-Ear Monitors in the market.
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Made For Professionals
Painstakingly tuned and designed as the ultimate studio monitor with inputs from renowned audio engineers and musicians around the world over many months, the U9 is our flagship model that has been enjoyed and celebrated by the same people who helped craft them.
Learn MoreCustom Options Available
For those chasing sonic perfection, the U9 is available as the C9 Custom In-Ear Monitors.
Achieve up to -36dB with an absolute seal, translating into the best possible isolation and sound reproduction from our In-Ear Monitors.
Have it your way, however you want it.
About Stealth Sonics
With roots in Pro-Audio, Audiology and Aerospace, our carefully tuned In-Ear Monitors deliver amazing high-resolution audio, superior sound isolation, all-day ultralight comfort and in-built hearing protection for musicians, audio professionals, audiophiles and gamers alike. Designed and Assembled in Singapore, The Lion City.
Technical Specifications
| Drivers | 1x Dynamic Neodymium 9mm High-density Magnetic, 2x Balanced Armature (Mid), 2x Balanced Armature (High), 4x Balanced Armature (Super High) |
| In-Built Hearing Protection | Klarity Valve© for Pressure Relief |
| Isolation | -26dB (-36dB for Customs) |
| Frequency Response | 18Hz to 40kHz |
| Impedance | 16 Ohms @ 1kHz |
| Weight | 4.16 Grams Per Monitor |
| Warranty | 1 Year |