FiR Audio Project K – Ultimate Innovation in IEM Technology
Discover FiR Audio Project K – a revolutionary in-ear monitor (IEM) that redefines high-end personal audio. Built with over a decade of acoustic innovation, Project K stands as FiR Audio’s flagship creation—merging sonic brilliance with elite craftsmanship.
The Project K features a 5-driver hybrid configuration, including a powerful 9mm Kinetic Bass dynamic driver and four OpenDriver balanced armature drivers tuned to deliver immersive, true-to-life sound across the full frequency spectrum. With a frequency response of 20Hz–20kHz and 15 ohms impedance, it delivers effortless clarity, deep lows, and lush mids—ideal for audiophiles, musicians, and critical listeners alike.
Crafted for Performance and Elegance
Project K is engineered with precision-machined titanium shells for durability and resonance control. Its stunning blue copper faceplates topped with sapphire glass exude luxury while providing enhanced structural integrity. Inside, premium silver internal wiring ensures ultra-clean signal transmission with zero compromise.
Advanced Acoustic Features
ATOM Venting System with Gold + Xs modules (customization-ready)
Sapphire glass top – combines beauty with durability
Premium white leather case – designed for audiophiles on the go
Audiophile-Grade Cable Included
4-core coaxial cable (1.6mm OD)
Silver-plated copper inner conductors (24 strands x 0.06)
Shielding: 80 strands x 0.06 silver-plated copper
Nickel-plated connectors for durability and signal integrity
With FiR Audio Project K, you're not just listening—you’re experiencing music at its most refined. Elevate your IEM collection with a flagship that delivers next-level sound, craftsmanship, and innovation.
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
FiR Audio was founded in 2018 by two brothers, Bogdan and Alex Belonozhko and their friend Daniel Lifflander. Between them they have over 20 years of experience in designing and manufacturing some of the most advanced in-ear monitors while they were at 64 Audio. At FiR Audio, they are able to produce the next generation of IEM products, again pushing the boundaries of IEM technology.
In 2019 FiR Audio released the M-Series, their first line of In-Ear Monitors which gained considerable popularity from professional musicians and audiophiles all around the world. Featuring proprietary IEM technologies which all work together to provide the most natural and enjoyable listening experience. Including the ATOM venting system, Direct Aperture Acoustics, Tactile Bass, and the ultra-durable RCX connector. The M-Series showcased FiR Audio’s knowledge, expertise, and capabilities and cemented their reputation as a high-end in-ear monitor company.
Along the way, FiR Audio also tackled some of the biggest unsolved issues when it came to cleaning and maintaining in-ear monitors. This resulted in FiR Audio launching the IEM Vacs, followed later by the IEM Dryers. The perfect solution for audiophiles and monitor engineers who want to maintain their in-ears and keep them at peak performance at all times, also preventing repairs and down time.
Two years later, in 2021 FiR Audio released the Frontier Series, which includes the flagship Xenon 6, Krypton 5, and Neon 4 models. Packed with revolutionary technologies such as Kinetic Bass, a hybrid conduction technology which enables a very rich and natural bass, ATOM XS, the next generation ATOM module, Open Acoustics System, with Open Drivers that don’t use sound tubes, and Rigid Technologies that provide industry leading durability and serviceability of the IEMs. The Frontier Series comes in both Custom-Fit and Universal-Fit models.
AUDIOCULAR AC42 Magnetic DAC Dongle Holder – MagSafe-Compatible Holster
11/21/2025
Ishan Thapa
Probably the best IEM you can get for 2500
Build quality is top notch. It's heavy but not uncomfortable. Coming to sound it has balanced sound signature with slight emphasis on treble.
CCA Phoenix IEM
11/18/2025
Arjun
Outstanding audio quality in sound in this price range
Excellent studio quality clear natural audio with good enough bass, well-balanced thanks to the audio store team and Pritaam Halpawat sir, great customer service, and 100% authentic genuine products.
TANCHJIM Bunny Type-C DSP Plug with Mic IEM
11/18/2025
Anonymous
Great
Great
KZ EDX PRO X IEM With Mic & Audiocular SPARK DAC
11/18/2025
Mohit Kumar
If budget is tight go for it.
Nice I like it.
KZ EDC PRO Wired IEM With Mic
11/18/2025
Mihir Bhagat
Best for the budget (~929 rs)
I was using Sennheisers CX80s with Samsung Galaxy A52s and it has 3.5 mm jack but the sound quality & output levels are very bad. So, I had to get a DAC and I watched a lot of reviews before making this purchase and one thing I can say is the sound quality is better than Apple's dongle becoz it only supports 16/44.1-48KHz .
The cable is super flexible and supports both Type C & Type A connection for PCs.
AUDIOCULAR SPARK Hi-Res Portable DAC Dongle CX31993 + MAX Amp
11/17/2025
Ajinkya Sarode
Summary review of the Mega5Est
These IEMs have a unique personality and it does match the many YT reviews that I watched before making this purchase.
The tuning is very neutral leaning slightly bright. These IEMs will present all instruments and everything that is present in the mix without emphasizing. Bass and sub bass present without any mud or overpowering of other frequencies. Mids are well presented, in fact these are all about the mids which are mostly neglected in favour of bass tightness and extended treble.
I found the vocals slightly forward but not harsh, in fact nothing is overpowering in the presentation here which may come across as boring but it is simply presenting the songs as is. You can easily drift off mentally while listening, the presentation is so neutral and focus back whenever you wish to.
Overall these are very solid IEMs good for analysing and casual listening both. Tuning preferences may be highly personal and there may obviously be many who may not prefer this kind of tuning but still this doesn't take any points away.
I am happy with the purchase and prompt delivery.
Hisenior Mega5EST IEM
11/17/2025
NITESH KIRAR
KZ Castor Pro IEM With Mic - Harman Target with Improved Bass
have been using this for more than 2 months. The audio is very clear specially the vocals and the bass is also decent overall very balanced sound
KZ Castor Pro IEM With Mic
11/16/2025
Ritvik singh
Sturdy
At the price, can't complain.
Perfect sturdy piece to carry(not in pockets) anywhere
Truthear Hexa fits perfectly.
EarAudio In-Ear Monitors (IEM), Earphones Carry Case
11/13/2025
Kaustubh Mudgale
This IEMs delivers excellent sound across all music genres and is used daily
This IEMs delivers excellent sound across all music genres and is used daily. The unboxing experience is premium. However, a minor issue has been identified: the right-side IEM produces a subtle noise when tapped while worn, which may indicate a manufacturing defect.
Truthear x Crinacle Zero:BLUE2 IEM
11/13/2025
Anjan Prasad
Great purchase in this price range
DAC sounds perfect when you connect it with laptop or PC
has a less sound when you play with Smartphone.
Other than this the IEMs are great
Great fit to ears
ROSESELSA AURORA Ultra IEM
11/10/2025
Anonymous
This DAC is awesome and a perfect value addition to my IEM
This DAC is awesome and a perfect value addition to my IEM. It enhances the quality of the audio and make it a bit loader as well. Buying and its a must have accessory for the audiophiles.
AUDIOCULAR SPARK Hi-Res Portable DAC Dongle CX31993 + MAX Amp
11/10/2025
Kevin Dedhia
Heavenly
Powerful, stylish, worth the price, good mic quality, the best in the range!
KZ Castor Pro IEM With Mic
11/09/2025
Kevin Dedhia
High quality stuff
Powerful performance with good looks
AUDIOCULAR SPARK Hi-Res Portable DAC Dongle CX31993 + MAX Amp - Black
11/09/2025
Kevin Dedhia
High quality carry case
I like the simple design without any text. The material is good. The size is perfect for carrying DAC - IEM - any other accessory.
EarAudio In-Ear Monitors (IEM), Earphones Carry Case
11/09/2025
STAY TUNED ON EVERY PLATFORM
Brand Warranty
100% Original products with brand warranty
7 Days Replacement
On all orders*
Fast & Free Shipping
Ships in 24 Hours*
Secure Payments
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Pradeep Kulkarni
Very helpful in maintaining type C
Very helpful in maintaining type C cable
AUDIOCULAR AC42 Magnetic DAC Dongle Holder – MagSafe-Compatible Holster
Priya Bouri
Aurora ultra iem
It's the best out there but i forgot to take that dongle so 😫
ROSESELSA AURORA Ultra IEM
Anonymous
Really good IEMs matched my expectations
Really good IEMs matched my expectations perfectly!
TANCHJIM Bunny Type-C DSP Plug with Mic IEM
Srinjan Dey
W cable
Comes with a mic that's pretty great. Also the wire tangles a lot less than the proprietary ones
7HZ Salnotes Zero Replacement Cable
Ishan Thapa
Probably the best IEM you can get for 2500
Build quality is top notch. It's heavy but not uncomfortable. Coming to sound it has balanced sound signature with slight emphasis on treble.
CCA Phoenix IEM
Arjun
Outstanding audio quality in sound in this price range
Excellent studio quality clear natural audio with good enough bass, well-balanced thanks to the audio store team and Pritaam Halpawat sir, great customer service, and 100% authentic genuine products.
TANCHJIM Bunny Type-C DSP Plug with Mic IEM
Arjun
Excellent Shopping experience
Excellent Shopping experience excellent customer care service
The Audio Store
Anonymous
Great
Great
KZ EDX PRO X IEM With Mic & Audiocular SPARK DAC
Mohit Kumar
If budget is tight go for it.
Nice I like it.
KZ EDC PRO Wired IEM With Mic
Anonymous
Awesome sound and comfort
Really comfortable in ears and the sound quality is also superb.Very happy with the purchase!