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Fosi Audio i5 Open-Back Planar Magnetic Headphones
The Fosi Audio i5 is an open-back planar magnetic headphone designed to deliver reference-level clarity, low distortion, and long-term comfort. Developed through extensive in-house acoustic tuning, it combines large-scale planar drivers with carefully engineered materials to achieve a natural, spacious presentation.
With a focus on precision, comfort, and refined craftsmanship, the i5 is suited for critical listening, studio work, and immersive home audio setups when paired with a capable headphone amplifier.
Features
- Open-back planar magnetic headphone design for an expansive, accurate soundstage
- Nano-thin diaphragm engineered for fast transient response and low distortion
- Ultra-large 97 mm planar driver designed to reveal fine detail and layered sound
- Symmetrically arranged high-strength magnetic matrix for precise diaphragm control
- Silver-coated diaphragm using sputtered coating technology for refined, consistent performance
- Acoustically transparent rear mesh to support open sound and controlled damping
- Studio-oriented tuning aimed at natural timbre and reference accuracy
- Memory metal headband designed to maintain shape while reducing pressure
- Dual-axis earcup arms for improved fit across different head shapes
- Stepless silicone adjustment system for precise, smooth headband sizing
- Breathable, skin-friendly earpads with memory foam for extended listening comfort
- Handcrafted walnut wood earcups paired with a CNC-machined aluminum frame
Specifications
- Transducer type: Planar magnetic
- Driver size: 97 mm
- Diaphragm thickness: 2 μm
- Frequency response: 10 Hz – 50,000 Hz
- Sensitivity: 98 dB/mW @ 1 kHz
- Nominal impedance: 28 Ω
- Maximum SPL: ≥ 120 dB SPL
- Total harmonic distortion: < 1% @ 100 dB SPL
- Recommended amplifier power: ≥ 500 mW
What’s in the box
- Fosi Audio i5 headphones
- 3.5 mm headphone cable
- 6.35 mm adapter
- User manual
Product Details
- Fosi Audio i5
-
Brand New : Factory Sealed
- EFLC : 15468
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Warranty
Two Year Warranty
- Parts and Labour Warranty
- Canada-wide Coverage
- Fosi Audio Authorized
Returns
Peace of Mind Purchase
- Factory-sealed items are fully covered
- 10-day return window for unopened products
- Support available if there’s an issue on arrival
About Fosi Audio
Fosi Audio focuses on personal audio built for everyday listening, with a lineup that can include headphones, earbuds, portable DACs, and digital audio gear designed for clean sound and easy use. Whether you're listening at home, at work, or on the go, these products are made for practical comfort, reliable connectivity, and solid performance. We've been carrying Fosi Audio since 2020.
Explore our current Fosi Audio selection and best sellers. We offer both new and open-box items, and everything is clearly marked. Popular categories include Portable DACs & Headphone Amps, Amplifiers & Receivers, Audio System Components.
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