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Fir Audio Custom Radon 6 Limited Edition CIEM

Fir Audio's 5 Year Anniversary model, now available in custom fit - limited to 100 units worldwide.

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This product is a custom in-ear monitor that requires a scan or impression of your ear made by a professional audiologist or technician.

All product images are for reference only. The final appearance of your CIEM will differ based on your chosen design.

Minidisc offers end to end delivery of custom in-ear monitors including 3D scans, in-store demos, ordering and after sales service. Click here for more details and frequently asked questions about what to expect!


Please contact us BEFORE you get your impressions, and we will give you brand-specific instructions for obtaining impressions.

In partnership with Auricle Digital, Minidisc can now offer in-store impressions using the latest eFit 3D scanning technology. Click here for more details and to make a booking!

Minidisc also recommends NS Audiology for physical impressions - please mention us when making an appointment for a discount on your impressions.

Limited Edition CIEM Model

he Radon 6 is a Limited Edition Anniversary model celebrating 5 years in pursuit of the ultimate in-ear monitor listening experience. The newly released custom-fit model is limited to 100 production units worldwide with a production cap of only 20 units per month.

Fir Audio has applied everything they've learned from Frontier Series and mindfully retuned their popular Xenon 6 model to arrive at a leaner, reference warm sound signature. Featuring proprietary technologies such as Kinetic Bass, ATOM Venting, Open Acous- tics, and Rigid Technologies.

The Custom-Fit model features all of the premium design options of the Frontier Series. The Rn6 CIEM ships with the exclusive pure silver, oxygen-free cable with copper shielding.

Kinetic Bass

Featuring a 10mm dynamic driver, open and facing the outside of the IEM shell. Allowing low frequencies to be transmitted directly to the ear cartilage. Resulting in a bass you can feel with increased dimension and an off-the-charts low frequency extension.

Open Acoustics System

The Open Acoustics technology consists of three major parts: Open Drivers, Sound Reactor, and Sound Reflector. Enabling smooth, airy highs with great high frequency extension, and allows pure and natural sound to flow freely into the ear canal.

Atom XS Venting

Venting harmful air pressures from inside a sealed ear canal. Your eardrums stay relaxed and you can listen to music longer without ear fatigue. The sound-stage is also wider and feels more natural.

  • Pure silver, Oxygen-free, copper shielded Black Cable
  • Gold-plated balanced 4.4mm Termination
  • Internal ATOM or ATOM X Modules (upgrade)
  • Genuine Leather Protective Case
Driver Configuration
  • 1x Kinetic Bass 10mm Dynamic Driver
  • 1x OpenDriver Bass BA Driver
  • 2x OpenDriver Mid BA Driver
  • 1x OpenDriver High BA Driver (with Sound Reflector)
  • 1x OpenDriver Ultra-high Electrostatic Driver
Tech Specs
  • Freq. Range: 20-20kHz
  • Impedance: 28ohms

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