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.
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.
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
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.
Driver Configuration
1x 9mm Kinetic Bass Dynamic Driver
2x OpenDriver Balanced Armature Driver for mids
1x OpenDriver Balanced Armature Driver for high-mids
1x OpenDriver Balanced Armature Driver for highs (with Sound Reflector)
Technical Specifications
Frequency Range: 20-20kHz
Impedance: 15 ohms
Cable Specifications
4core, Coaxial Structure, OD:1.6mm
Inner Conductor: 24x0.06 Silver Plated Copper
Shielding: 80x0.06 Silver Plated Copper
Nickel Plated Hardware
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.
Love them !! Cris and clear vocals
Whati expected that fullfill.best iem for beginners.bass is great
Best Budget IEMS. This was my first time buying this iems and i didnt got single complaint for this. its just good for this price point
New on this IEM journey and I must say they sound better than my 3x priced headphones.
I like the sound and clarity.
Coming from Juzear Defiant and Punch Audio martilo, I would say that this is the best I have till date. Excellent in terms of clarity and technicalities. Being a medium sized IEM it is very comfortable for long listening sessions. Kudos to TAS for their excellent service.
I visited the experience store at Pune and Pritham and his asistant were very warm and welcoming. They patiently explained the pro's and con's of the Hidizs and gave me alternatives to try like the Truthear Nova and Simgot Supermix. Experiencing the different IEMS helped me maake a solid choice of what I wanted.
Also took time to sample an open back Sennheiser HD660S and the Hifiman Sundara. Was able to clearly make out the differnce betweeen a planar magnetic and DD. That helped me know what my prefernces were. Truly enlightening experience ended with a great purchase in the HIDIZS MP145.
These are my first IEMs. After a bit of research, I decided to go with the KZ Castor Pro as my first IEM. I'm really impressed with the audio depth, the crispness of audio and the clarity and separation of instruments and vocals. The music feels much different than the usual TWS earbuds which I was using before! The packaging was good, and delivery from Audio Store was good! Glad to have officially entered the IEM clan!
The Audiocular Spark DAC is amazing and it really enhances the audio quality compared to using my IEMs directly on my PC. The build is excellent, durable and it also comes with a carrying case. The packaging and delivery were both good. Really glad I bought this from here!
Unbelievable this TANCHJIM Bunny Type-C DSP whenIwas unboxed and listen immediately lheard totally theatricale experienced.It'stotally mesmerized me in sounds. In this price unbelievable soundquality. That's why this TANCHJIM Bunny Type-C DSP is more value than itsprice. Thanks once again to Pritam ji for suggestingme so wonderful IEM.
I herd of them and brought them was concerned but the audiostore team was gental and the quality of product was superior
Sound quality is very very neat and clean and in depth. Best purchase ever.
It's an amazingproductforthe price
I purchased these during christmas- and my initial impressions were that these were packaged well, and felt very premium in hand, except for the cable.
The bazz is very lacking, and the iems are unusable without tuning. After tuning these sound full, and have beautiful clarity. Definitely recommend if you can tune them. Also very good for video editors and others who need stock audio
It sounds wonderful 👍
I am very satisfied with my purchase and currently enjoying hi-res audio with my iem. Best looking and build quality is also good under 1K
Brand Warranty
100% Original products with brand warranty
7 Days Replacement
On all orders*
Fast & Free Shipping
Ships in 24 Hours*
Secure Payments
Visa, Mastercard, EMI, Net Banking, UPI, BHIM, Wallet's
I’ve been testing the KZ Duonic (Bass Improved Version) for a while now using an Audiocular DAC, and honestly, these have no business sounding this good for the price. If you’re tired of "boring" neutral IEMs and want something that actually has soul, this is it.
i just switched to iems and for the first one i have gone with the moondrop chu2 and they are an amazing iem with great audio quality and the build is also very premium as it is metal body, considering this as a very starting budget iem it is very good. I look forward to buying more from theaudiostore. Thank you
Does the work well.
Love them !! Cris and clear vocals
I'm enjoying immerse lossless, dolby Atmos sound from my moto edge 60 pro from this low cost cable. I purchased another one for my son also.
Wonderful product
Awesome. Worth of Money
Whati expected that fullfill.best iem for beginners.bass is great
Best Budget IEMS. This was my first time buying this iems and i didnt got single complaint for this. its just good for this price point
Fast delivered 2days before date





