KEFINE Quatio 2DD+2BA Hybrid In-ear Monitors

Introducing the Kefine Quatio – Kefine's debut hybrid in-ear monitor that blends rich musicality with impressive technical performance. This quad-driver (2DD + 2BA) IEM delivers a warm, lush sound signature perfect for audiophiles, casual listeners, and anyone craving immersive audio without fatigue. Following hits like the Klean, Delci, and Klanar, the Quatio elevates Kefine's lineup with deep bass, smooth mids, detailed highs, and three swappable tuning nozzles for personalized sound.

Kefine Quatio – Kefine's First Hybrid IEM: Warm, Musical, & Fully Tunable

Key Features at a Glance

• Kefine’s first hybrid IEM – 2 Dynamic Drivers + 2 Balanced Armatures (quad-driver setup)
• Warm, lush, musical tuning with powerful yet controlled bass
• 3 Interchangeable Tuning Nozzles: • Gold – Transparent, neutral, accurate (great for monitoring & detail) • Silver – Balanced, versatile (ideal everyday listening) • Black – Warm, smooth (lush vocals & relaxed immersion)
• Hybrid three-way crossover (physical acoustic tubes + electronic board) for precise, seamless driver integration
• Premium CNC-machined aviation-grade aluminum alloy shells – ultra-thin (0.06mm walls), lightweight, and highly comfortable
• High-purity silver-plated oxygen-free copper cable – 4-strand braided (98 wires per strand = 392 cores total) with modular plugs (3.5mm single-ended + 4.4mm balanced)
• Easy to drive – 32Ω impedance, 107dB sensitivity
• Variety of ear tips included for optimal fit, seal, and tuning adjustment

Quad-Driver Hybrid Configuration

Each earpiece houses:

• 10mm DLC diaphragm dynamic driver – High-resolution full-range clarity
• 8mm PU + LCP diaphragm dynamic driver – Deep, textured bass with fast response
• Dual balanced armature drivers – Crisp, extended highs above 5kHz for air, sparkle, and detail

Three-Way Hybrid Crossover + Customizable Tuning

The sophisticated hybrid crossover design uses dedicated acoustic channels (physical tubes) and an electronic board to route frequencies perfectly from each driver group to the nozzle. Switch nozzles in seconds to fine-tune the sound profile to your preference or music genre.

Exceptional Build & Comfort

• CNC-machined from aviation-grade aluminum with 0.01mm precision tolerance
• Over 30 minutes of processing per pair for a well-textured, polished, and anodized finish
• Ultra-thin 0.06mm shell walls minimize bulk while maximizing long-session comfort

Premium Modular Cable

• 4-strand braided high-purity silver-plated OFC for clean, lossless signal transmission
• Swappable termination plugs: 3.5mm single-ended + 4.4mm balanced
• Fully compatible with phones, dongles, DAPs, amps, and more

Technical Specifications

• Driver Configuration: 2DD (10mm DLC + 8mm PU+LCP) + 2BA Hybrid
• Impedance: 32Ω
• Sensitivity: 107dB ±3dB
• Frequency Response: 20Hz – 20kHz
• Connector: 0.78mm 2-Pin Detachable
• Cable: High-purity silver-plated OFC, modular 3.5mm / 4.4mm plugs

What's in the Box?

• Kefine Quatio IEMs (pair)
• Premium hard carrying case
• 3 sets of tuning nozzles (Gold, Silver, Black)
• Modular cable with 3.5mm + 4.4mm plugs
• Multiple ear tip sets (various sizes & types for fit & tuning)
• User manual & accessories

At just $129, the Kefine Quatio delivers flagship-level musicality, versatility, and incredible value. Reviewers and the community praise its engaging, holographic soundstage, balanced-yet-fun tuning, and outstanding build quality – often calling it one of the best hybrid IEMs under $150!