FiR Audio Radon 6 custom faceplates front
FiR Audio Radon 6 custom faceplates front on top of Pelican case
FiR Audio Radon 6 custom faceplates front with attached stock cable
FiR Audio Radon 6 custom faceplates closeup front left IEM
FiR Audio Radon 6 custom faceplate closeup front right IEM with attached cable
FiR Audio Radon 6 custom faceplates front 3 quarter
FiR Audio Radon 6 custom faceplates front with guitar pickups

FiR Audio Radon 6 Limited Edition | Custom Tribrid IEMs

Regular price$3,299.00

FiR Audio Radon 6 logo

Get FiR Audio's Popular Limited Edition Radon 6 Tribrid IEM in a Highly Exclusive Custom-fit Model

  • Limited Edition celebrating 5 years, Limited to 100 units worldwide, production cap of 20 per month
  • 14 different shell styles, 48 faceplate options, assorted FiR logos, or your own custom artwork for a highly customizable experience
  • Internal or interchangeable ATOM X modules for varying levels of isolation and bass
  • Includes either an Aluminum round case or Pelican style 'Touring' case
  • Ships with proprietary pure Silver, oxygen-free, Copper shielded, Black, 4' cable with 2-pin / 4.4mm termination

FiR Audio Radon 6 custom IEM front with Atlantis and Obsidian Sparkle faceplates

Bloom's Take

In the wake of FiR Audio's successful launch of the Radon 6 limited edition universal IEM, they are now offering a custom fit model with customizations galore! We at Bloom LOVE the Radon 6, specifically the sound signature and FiR's Kinetic Bass and ATOM Venting technical innovations which gave us a unique low-end experience and extended listening times. We are SALIVATING over the custom faceplate options...

The initial transaction for custom-fit IEMs is a breeze, but the full process can be a little complicated. Here is the guideline for FiR Audio's custom process. In step 1, use FiR's IEM Designer and send us the custom order details. Please do not hesitate to reach out to us if you are confused throughout the process - we'll help you along the way.

The end result is an incredible set of IEMs boasting combined sonic bliss of the Radon 6 with a perfect match for your ears!

If you'd like a little more in-depth understanding of the custom-process in general, check out our Custom IEMs Guide.

For impressions and comparisons of the popular Radon 6 Universal IEM, read our full review here.

Radon 6, from FiR Audio

The Radon 6 custom IEM is a Limited Anniversary model, limited to 100 production units world-wild, celebrating 5 years in pursuit of the ultimate in-ear monitor listening experience.

Everything learned from the Frontier Series has been applied with a mindful retuning of the popular 6-driver model arriving at a leaner, reference warm sound signature. It features the proprietary technologies of the Frontier Series with Kinetic Bass, ATOM Venting, Open Acoustics, and Rigid Technologies.

While previously a Universal-fit only model, the Rn6 is now available as a Custom-fit model with 14 different shell styles, 48 faceplate options, assorted FiR logos, and even your own custom artwork if you desire! It also comes with a pure silver with copper shielding cable that's exclusively designed and built for the Radon 6.

FiR Audio Radon 6 right IEM closeup with Atlantis faceplate

Kinetic Bass

Kinetic Bass is a bass you can feel. Kinetic Bass technology features a 10mm dynamic driver that is open and optimally ported directly facing the outside of the IEM shell. This allows low frequency sound to be transmitted directly to the ear cartilage and surrounding area.

ATOM Venting

No more pressure. With the ATOM system, your ear drums can stay in their natural position so you can listen to music longer and safer without tiring. The soundstage is wider and feels more natural.

Open Acoustics

The Open Acoustics System consists of 3 major parts:

Open Drivers
Uses no sound tubes and radiates sound directly into the Sound Reactor for freely flowing sound and a much larger soundstage.

Sound Reactor
A chamber that shapes the sound received from the Open Drivers using natural acoustics instead of traditional dampers and filters.

Sound Reflector
Directs the high frequencies into the ear canal for remarkably smooth highs with great extension.

RIGID Technologies

Rigid 2-Pin
The most durable 2-Pin connection on the market, rated for 1,000 connections without issue.

Rigid Snap Screen
An acoustically transparent mesh screen that protects debris from entering the canal stem and is easily replaceable.

FiR Audio Radon 6 custom IEM with Obsidian Sparkle faceplate and attached stock cable highlighting RIGID screen and Kinetic bass port


  • (x1) 10mm Kinetic Bass Dynamic Driver
  • (x4) OpenDriver BA Drivers for Mids & Highs
  • (x1) OpenDriver Ultra-high Electrostatic Driver
  • Frequency Range: 20-20kHz
  • Impedance: 28Ω
  • Connector Type: 2-Pin 0.78mm
  • Cable: Pure silver, Oxygen copper shielded black cable with gold-plated balanced 4.4mm termination
  • FiR Audio 3 Year Warranty

In the Box

  • FiR Audio custom Radon 6 IEM
  • 4.4mm, 2-pin cable
  • Aluminum, Genuine Leather, or Pelican style 'Touring' case
  • ATOM X module kit available
  • Warranty and instruction card

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