Bellos Audio X4 CIEM

Build Time:
2 Weeks
Key Features:
  • 4 driver flagship in-ear monitor with 6mm dynamic bass driver
  • Rich, warm tone with clear vocals
  • 'Air Canal' hybrid custom design for maximum comfort
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Bellos Audio is thrilled to unveil the X4, the flagship product from the X-Series line of Custom In-Ear Monitors. The X4 is the culmination of Bellos Audio's dedication to delivering an exceptional audio experience to musicians and audiophiles alike. Featuring an added ultra-high driver and our proprietary In-Air Canal technology, the X4 delivers an unprecedented level of clarity, detail, and realism.

The X4’s tuning is finely crafted to deliver a reference warm sound signature that reveals every subtle detail of your music. The ultra-high driver provides an extended frequency response, delivering a very smooth and natural sound. The In-Air Canal technology enables the most comfortable CIEM listening experience. So comfortable it’s like having nothing in your ears! The X4’s are the best in class in ear monitors and are the perfect choice for anyone who demands the highest level of audio quality.

Like all X-Series, it comes with a host of additional proprietary technologies such as ATOM Venting which greatly expands the soundstage, beautiful 3D Printed Matte Shells, the ultra-durable RCX Cable Connector, Modular Drivers & Removable Faceplates for fast and easy service and repairs.


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Drivers 3 Balanced Armature drivers + 1 Dynamic Driver
Frequency Response 20Hz – 20kHz
Impedance 16Ω at 1kHz
Sensitivity 116 dB/mW
Crossover Integrated 4-Way Crossover
Isolation -17dB (internal ATOM)

Audio Performance

Drivers4 Drivers
Sound Signature
Rich, balanced tone with clear vocals


Low Mid

Mid High


Resolution (8)

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Australia’s first in-store 3D ear scanning service.

In partnership with Auricle Digital, Minidisc can provide in-store or on-site 3D ear scans using the latest light and laser based technology. The 3D scan process is less invasive than the traditional physical impression method, and produces a more comfortable CIEM. 3D scans take 30 minutes or less, with a success rate of 95%.

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