FIR Audio Radon 6

Celebrating 5 years of FIR Audio. Releasing a new Limited Edition model with a new sound signature and all-new look.

  • Hybrid IEM with 1 x Dynamic Driver, 4 x Balanced Armatures and 1 x EST Driver
  • Machined Aluminum Shells (UIEM)
  • Sapphire Glass Faceplates (UIEM)
  • ATOM XS Interchangeable Modules (UIEM)
  • Pure Silver, Oxygen Copper Shielded Black Cable
  • Available in Universal Fit Only
Regular price $3,154.00
Sale price $3,154.00 Regular price
Unit price
Tax included.
FIR Audio Radon 6

FIR Audio Radon 6

Product description
Technical Details
Shipping & Returns
Warranty Policy

The Radon 6 is FIR Audio’s 5 Year Limited Anniversary model, limited to 300 production units world-wide. Celebrating 5 years in pursuit of the ultimate in-ear monitor listening experience.

FiR Audio applied everything they learned from Frontier Series and mindfully retuned the popular 6-driver model and arrived at a leaner, lighter, and more detail oriented sound signature. Featuring proprietary technologies such as Kinetic Bass, ATOM Venting, Open Acoustics, and Rigid Technologies.

The Rn6 is a Universal-Fit only model with an all-new satin black machined aluminum body, gorgeous sapphire crystal glass faceplates, and a pure silver cable that's exclusively designed for the Radon 6.

The tribrid system consists of tubeless balanced armature Open Drivers, an ultra-high electrostatic tweeter, and a dynamic driver with the revolutionary Kinetic Bass technology - all working in perfect harmony. 

The Radon 6 comes in Universal-Fit only.

Conventional In-Ear Monitors (IEMs) can often lack depth and feel because they only provide you with half the sound. When you listen to music in a natural open-ear environment, you hear sound in two ways: air conduction and bone conduction. Air conduction is sound that you hear with your eardrums. Bone conduction is the conduction of sound through the bones in your head as it reaches the inner ear (cochlea). Hybrid conduction is when you can hear with both, air conduction and bone conduction.

A bass you not only hear, but can also feel.

Kinetic Bass technology features a 10mm dynamic driver that is open and ported in an optimized manner directly facing the outside of the IEM shell. This allows low frequency sound to be transmitted directly to the ear cartilage and surrounding area. These low frequencies are converted to kinetic energy and reach the inner ear via bone conduction. This results in a more immersive sound with a bass you can feel with increased dimension and an off-the-charts low frequency extension.

Traditional in-ear monitors use a miniature speaker called a driver with a sound tube that carries the sound to the canal stem. The tube introduces unwanted resonances and results in a closed-in, stuffy sound.

The Open Acoustics System consists of three major parts: Open Drivers, Sound Reactor, and Sound Reflector.

technical specifications


Elise Audio has a standard 14-day return / exchange policy for electronic products (DAC/DAP):

Must be returned in like-new factory condition 

Must include all original packaging and accessories

Please note that the return shipping cost is to be paid by the customer.

Returning products that raise hygiene concerns - Products that have contact with the ear, nose or throat can only be returned for a full refund if sent back sealed and in unused condition. This applies all in-ear monitors.

If you are dissatisfied with your product please get in touch with us. We may be able to offer credit for another purchase (subject to inspection of the returned product) or to purchase the product back as used if we can dispose of the item as B stock. Please note the products would need to be inspected before any final offers are made but, as a guidance only, a 20% restocking fee will be applied on most in-ear monitors.

Custom made products - Products that have been custom made to the customer's specification cannot be returned for a refund or credit under this policy.

Read our full Returns, Warranty & Terms of service by clicking here


We offer a range of delivery options to suit your purchasing needs. The options are presented to you at the checkout, in an easy to understand way.

Most orders for In-Stock items are shipped within 1 to 3 business days (Monday to Friday, except bank holidays), subject to stock availability and security checks. Please ensure you provide a valid phone number for us to contact you should verification of your identity be required.

For More information about our Shipping Policy please click here

Royal Mail Special Delivery - Next Business Day

Products purchased from Elise Audio are supplied with a manufacturer warranty that is specified on the product page on our website. Most products come with a 1Y manufacturer warranty (or 3 months for B-grade, open box, refurbished, ex-demo and second hand items).

The manufacturer's warranties are limited to physical defects in the materials, parts and workmanship used in making the product. Abnormal conditions, deliberate abuse and damage due to accidents, operator's error, or unauthorized service attempts are excluded from any warranty claims.

Faulty goods returned under the manufacturers warranty are to be returned to Elise Audio at the cost of the customer. Elise Audio will cover the cost of shipping the repaired or replacement product back to the customer.

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