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Description
KEFINE Quatio Hybrid IEM – Precision-Tuned Versatility, Now in 2DD+2BA Hybrid Format

Discover KEFINE’s first hybrid IEM – the Quatio, a premium 2DD+2BA configuration built to deliver a rich, immersive, and musical listening experience. Designed for audiophiles seeking both technical finesse and tuning flexibility, the Quatio features a quad-driver architecture with two dynamic drivers (10mm DLC + 8mm PU+LCP) and dual balanced armatures, delivering exceptional clarity, impactful bass, and refined highs.
What sets the KEFINE Quatio apart is its dual-way crossover system—a combination of physical acoustic channels and electronic crossover boards, ensuring each driver is precisely tuned for optimal performance. Whether you're enjoying jazz, classical, EDM, or vocal-centric tracks, the three interchangeable tuning nozzles (Warm, Balanced, and Neutral) allow you to tailor the sound to your preference.
Housed in CNC-machined aluminium alloy shells, the Quatio combines sleek aesthetics with superb ergonomics. Each shell is polished, anodised, and crafted with ultra-fine tolerance (0.01mm) for a snug, fatigue-free fit.
Bundled with a high-purity silver-plated copper cable, this IEM also features a modular plug system that supports both 3.5mm single-ended and 4.4mm balanced outputs—perfect for pairing with portable DACs and players.
Whether you're a seasoned audiophile or a passionate newcomer, the KEFINE Quatio offers a complete, adaptable, and high-resolution listening experience like never before.

🔍 Key Features
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✅ 2DD + 2BA Hybrid Drivers – Dual dynamic and dual balanced armature configuration for layered, musical sound.
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✅ Three-Way Hybrid Crossover – Physical tubes + electronic crossover for seamless frequency separation.
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✅ Replaceable Tuning Nozzles – Includes 3 nozzle sets (Gold: Neutral, Silver: Balanced, Black: Warm).
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✅ Premium CNC Aluminium Shells – Ultra-light, precision-built metal cavities for durability and comfort.
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✅ High-Purity Silver-Plated Cable – 4-strand braided cable with 392 cores for clean signal transmission.
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✅ Modular Plug System – Includes both 3.5mm and 4.4mm terminations for flexible device pairing.
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✅ Variety of Eartips Included – Ensures a perfect seal and customized comfort for every listener.

📊 Technical Specifications
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Driver Configuration: 2 Dynamic Drivers (10mm DLC + 8mm PU+LCP) + 2 Balanced Armatures
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Impedance: 32Ω
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Sensitivity: 107dB ± 3dB
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Frequency Response: 20Hz – 20kHz
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Connector Type: 0.78mm 2-Pin
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Cable: 4-strand silver-plated oxygen-free copper
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Termination: Modular (3.5mm + 4.4mm included)
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Shell Material: CNC-machined Aluminium Alloy
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Tuning Options: 3 replaceable nozzles (Warm, Balanced, Neutral)

Technical Specifications
Driver Configuration: 2 Dynamic Drivers (10mm DLC + 8mm PU+LCP) + 2 Balanced Armatures
Impedance: 32Ω
Sensitivity: 107dB ± 3dB
Frequency Response: 20Hz – 20kHz
Connector Type: 0.78mm 2-Pin
Cable: 4-strand silver-plated oxygen-free copper
Termination: Modular (3.5mm + 4.4mm included)
Shell Material: CNC-machined Aluminium Alloy
Tuning Options: 3 replaceable nozzles (Warm, Balanced, Neutral)
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
KEFINE provides refined audio products for music lovers at affordable prices and the best value.
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The Castor Pro (Harman tuned with enhanced bass) is amazing if you love punchy sound. The bass has strong thump and depth, but it doesn’t overpower vocals. Music feels lively and fun, especially for Bollywood and EDM.
Vocals are clear, treble is smooth (no harshness), and overall tuning is well balanced. Very enjoyable for daily listening and workouts.
Verdict: Great earphones if you want powerful bass with good clarity.
The packaging was very good, properly sealed.
Sound quality: If you are balanced sound signature lover, you would love this earbuds, mids, highs, lows everything is very clear.
No sound distortion even in full volume.
Mic Quality is average and ANC is also average. My main priority was sound quality.
Built quality is also good.
If you are planning to buy your 1st IEM around 1k then you must go with this one no other options are valid against it. And Big thanks to Audio store for quick delivery.
its really good
I’ve been genuinely impressed with this IEM The sound signature feels well-balanced and refined, making it enjoyable across different genres. What stood out most to me is the controlled bass it has enough punch to keep the music engaging It stays tight and clean, which adds depth without sacrificing clarity
Just one cosmic issue which I had is the right shell's rubber has got yellowish I don't know the reason but it is yellowish since I unboxed
The Tanchjim Bunny is a lightweight, premium-looking upgrade cable that prioritizes portability and comfort.
Build: High-purity silver-plated copper with a soft, tangle-free texture.
Ergonomics: Excellent flexibility with zero "memory" (no kinks) and very low microphonics (cable noise).
Sound: Provides a clean, transparent signal with a subtle "perceived" boost in treble clarity.
Best For: Users who hate stiff cables and want a minimalist, comfortable aesthetic for daily commuting.
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This s my first iem. When i used it first i didnt like tht much . But aftr using this i used my tws i was really shocked to c the diff. Nw this is part of my daily wear.
Make sure to selct ear tip according to ur size. It s really importnt.
Pretty good
I am using it with TANGZU - Waner SG 2 - Red Lion Edition -Type C. I replaced my type C cable with this and now its the beat thing I have done, Obviously with a external DAC
What a great great experience.
Clean and fast bass, balanced mids and crisp highs, loved the bunny. Also, good mic quality.
comfortable to wear. clean, layerd , detailed sound.
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ANC : 3/5
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Comfort: 4.5/5 As comfortable as the IEM itself. Gives a Open Wireless earphone feel in terms of comfort. I have wore it over 8-9 hours intermittently playing songs - didnt feel any bulk.
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Battery: 4/5 Decent battery backup.Adapters themselves give around 5-6 hours playback at 70-80% volume.
Overall a worth purchase if you are looking for tws convenience with your IEM.
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