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Stealth Sonics

Stealth Sonics U4 Universal Quad Driver In-Ear Monitor

 The four-driver U4 in-ear monitor features a balanced armature design favored by anyone seeking the flattest response possible. Housed in acoustically-optimized composite material that is soft and resilient, the Stealth Sonics U4 IEM offers advanced detail and crisp transients and covers a frequency range of 18 Hz to 23 kHz. The sound signature is supported by a punchy bass, a silky midrange and crystal-clear highs for a fully balanced listening experience.


  • Most people don’t know that your ear is a unique acoustic machine, with a frequency response all its own. And like fingerprints, every ear is different. That’s why we offer IEMs in both convenient, affordable universal-fit models or custom-tuned systems offering the ultimate in personalization. Choose from three multi-driver configurations, including balanced-armature and hybrid-driver options.

    Our Precision-Tuned In-Ear Monitoring Systems use our proprietary SonicFlo technology to engineer second-bend impressions that conform exactly to your inner ear canal, for superior fidelity, minimal acoustic interference and a perfect fit.

    Our universal in-ear monitors offer convenience, customization and value at every price point. All universal IEMs feature Stealth Damping Technology with removable faceplates for extending bass response, and a variety of cable options to further fine-tune your experience.

    All of our custom and universal in-ear monitor systems are built using our Iso-Stealth technology adapted from our aerospace technology innovations, for optimum isolation, anywhere.

  • Specifications
    -Drivers: 4
    -Type of Drivers: Balance Armatures
      1 x Balance Armature (Low)
      1 x Balance Armature(Mid)
      1 x Balance Armature(High)
      1 x Balance Armature(S/High)

    -Crossover:  4 way
    -Isolation: -26dB
    -Bore: 2
    - Frequency Response: 18 Hz to 23 kHz
    - Sensitivity: 114dB SOK @ 1mW
    - Impedance: 13 Ohms @ 1 kHz
    - THD: <-1% @ 1 kHz
    - Warranty Period: 1 Year


  • U4 Drivers x 1
    2-Pin Cable x 1
    Silicone Ear Tips (S/M/L)
    Carrying Case x 1