U4 | UNIVERSAL 4 DRIVER BALANCED IEM
U4 | UNIVERSAL 4 DRIVER BALANCED IEM
U4 | UNIVERSAL 4 DRIVER BALANCED IEM
U4 | UNIVERSAL 4 DRIVER BALANCED IEM

U4 | The Musician's Choice

Universal 4 Driver Balanced In-Ear Monitors

$698.00
  • Punchy Bass, Silky Mids and Crystal Clear Highs
  • High-Resolution 3D Audio made for professionals
  • In-built hearing protection Klarity Valve© for all-day listening

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Reviews

Great quality stage monitors that offer the complete package, a smooth and fatigue free signature combined with a very light weight and Klarity Valve to make them as comfortable as it gets.

Twister6

With Stealth Sonics (IEMs) is that the fatigue is basically non-existent.

Craig Wayne Boyd | Winner of The Voice S7

Confusingly powerful bass in a fully balanced armature setup—how the heck you do that Stealth Sonics!?

Audio Primate

Despite the U4’s low-end emphasis, a cleverly tuned upper-midrange and low-treble gives higher-pitched vocals a vibrant, crystalline quality.

The Headphone List 

It feels like I’m riding a wave! The amount of energy starting from the low end creates this natural motion in which the higher frequencies start to smooth off.

Bruce Tang 

Signature Sound Profile

Punchy bass, silky and detailed mid range and crystal clear high and super highs for a fully balanced listening experience.

Free Your Ears

At only 4 grams per side, experience ultralight comfort with the lightest IEMs ever.

Preferred Choice For Musicians

Sound usually comes down to personal preferences. The U4 happens to be the preferred In-Ear Monitors for many musicians.

Reduced Ear Fatigue

Listen all day with our proprietary designed in-built pressure relief Klarity Valve©.

Technology inside the U4

Click on the icons to learn more.

Frequency Response U4

Balanced Listening Experience

The 4 driver In-Ear Monitors offers a punchy and energetic profile that is focused on delivering advanced detail and crisp transients to its wearer to heighten the music experience. The sound signature features a punchy bass, silky and detailed mid range and crystal clear high and super highs for a fully balanced listening experience. 

Packed With Technology

At only 4.16 grams a side, the U4 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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Celebrated By Musicians

Our most popular till date, the U4 is the preferred In-Ear Monitors for many renowned musicians across the world. U4 has been tried and tested on the road, in the studio and on the big stages.

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Custom Options Available

For those chasing sonic perfection, the U4 is available as the C4 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.

Build Your Own

Come try the U4

Stealth Sonics Pte. Ltd
140 Paya Lebar Road #07-11
AZ@Paya Lebar
Singapore 409015

Mon - Fri ,1pm - 5pm

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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

Drivers1x Balanced Armature (Low), 1x Balanced Armature (Mid), 1x Balanced Armature (High), 1x Balanced Armature (Super High)
In-Built Hearing ProtectionKlarity Valve© for Pressure Relief
Isolation-26dB (-36dB for Customs) 
Frequency Response18Hz to 23kHz
Impedance13 Ohms @ 1kHz
Weight4.16 Grams Per Monitor
Warranty1 Year

FAQ