Bellos Audio X3 - 3 Driver Custom In-Ear Monitor
Bellos Audio X3 - 3 Driver Custom In-Ear Monitor
Bellos Audio X3 - 3 Driver Custom In-Ear Monitor
Bellos Audio X3 - 3 Driver Custom In-Ear Monitor
Bellos Audio X3 - 3 Driver Custom In-Ear Monitor
Bellos Audio X3 - 3 Driver Custom In-Ear Monitor

Bellos Audio X3 - 3 Driver Custom In-Ear Monitor

CHF 799.00

Delivery time approx. 2 weeks.



X3 Custom IEM

X-Series Matte Gray Desktop

We are pleased to introduce you to our latest product: the Bellos Audio X3 In-Ear Monitors. The result of years of research and development, the X3 delivers sound quality that exceeds all expectations. The X3 offers a natural, energetic sound, especially in the lower registers, thanks to the use of a dynamic 6mm woofer.

The X3 offers an exemplary level of space and headroom for a three-driver IEM. Because each instrument has its own space, the X3 delivers a natural and dynamic sound that captures every nuance of your music. We are confident that the X3's unique design with our revolutionary In-Air Canal Technology will set a new standard for custom in-ear monitors in today's market.

Like all models in the X series, the X3 also has a variety of additional technologies, such as: b the ATOM ventilation that significantly expands the soundstage, beautiful 3D printed matte shells, the ultra-rugged RCX cable connector, modular drivers and removable front panels for faster maintenance and repairs.

Estimated construction time: 5 days

(Construction begins as soon as we receive usable ear prints)

Bellos X-Series X3 Specs

Driver Specs

  • 1 High
  • 1 Mid/Low
  • 1 Dynamic 6mm Low


  • In-Air Canal Technology
  • 3D Printed Matte Finish Shell
  • ATOM Venting Technology
  • RCX Cable & Connector


  • 2 Balanced Armature drivers
  • 1 Dynamic Driver
  • Frequency Response: 20Hz – 18kHz
  • Impedance: 17Ω at 1kHz
  • Sensitivity: 116 dB/mW
  • Crossover: Integrated 3-Way Crossover
  • Isolation: -17dB (internal ATOM)


    Our proprietary technologies that enable us to produce best-in-class custom in-ear monitors.

    In-Air Channels

    Bellos Audio Technologien
    If you've ever used custom IEMs, you know that your ear canals deform when you open your jaw to sing or speak. As a result, the CIEMs lose their seal and feel uncomfortable in the ear. Introducing the revolutionary In-Air Canal technology. A patented design that allows for a complete seal at the opening (entrance) of the ear canal. It offers all the advantages of CIEMs without their disadvantages. They're so comfortable you'll forget you have them in!

    ATOM ventilation

    Bellos Audio Technologien
    A pressure relief system that releases air pressure that builds up in a sealed ear canal. This increases the soundstage and greatly reduces listener fatigue, allowing you to hear more and listen longer. You no longer feel like you are cut off from your surroundings.

    3D printed matte cases

    Bellos Audio Technologien
    Using our patented 3D printing technology, we design the custom in-ear monitors in 3D software with nanometer precision. The parts are printed and assembled efficiently by hand. Shortly thereafter, the matte finish is applied to the CIEM shell to ensure a very comfortable and organic fit with a "grippy" consistent seal.


    RCX cable

    Bellos Audio Technologien
    One ​​of the most common sources of error is the cable. Our proprietary RCX cable changes this. The only cable connection designed specifically for custom in-ear monitors. It's for 5.000 connections designed without errors. The RCX cable comes with our standard CIEM 2 year warranty.

    Removable faceplates

    Bellos Audio Technologien
    A revolution in the design of custom in-ear monitors. A traditional custom IEM must be cut open to be repaired. Our design features a faceplate that attaches with alloy steel screws, allowing us to repair custom in-ear monitors quickly and efficiently.

    Modular drivers

    Bellos Audio Technologien

    The CIEM enclosure is designed to accommodate a pre-assembled driver package that is tested in advance to ensure it meets all specifications. Modular drivers can be installed and removed without damaging or destroying the CIEM housing.