Name: Fosi Audio i5 Open-Back Planar Magnetic Headphones
Brand: Fosi Audio
SKU: 68903320c9f5c37b8651654e
Price: 3880.0 HKD
Availability: InStock

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Fosi Audio i5 Open-Back Planar Magnetic Headphones

2 years warranty

- Nano diaphragm, studio-grade sound
- 97mm driver, extreme detail resolution
- Ergonomic fit, all-day comfort
- Walnut build, premium craftsmanship
- Open-back, expansive soundstage accuracy

Until 2026-02-28T16:00:00.000+00:00 Fosi Audio discount (exclude fosi audio bundle set) on selected categories

Free shipping for orders spending over HK$500 [Non-Member] on order

HK$4,280.00

HK$3,880.00

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Pre order around 2-3 weeks (If order has other purchased items, they will be shipped together on the same day.)

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Democratizing Planar Sound

The i5 was born from our mission to make planar magnetic headphones more accessible—without compromising on sound quality, comfort, or design. Over a year of in-house development and acoustic tuning led to a headphone that delivers exceptional clarity, low distortion, and lifelike detail.

Transducer Type: Planar Magnetic Transducer
Maximum SPL: ≥ 120 dBSPL
Frequency Response: 10 - 50,000 Hz; THD: < 1% @100dBSPL
Sensitivity: 98 dB/mW @1kHz; Nominal Impedance: 28 Ω
Recommended Power: ≥ 500 mW

Description

Immersive Listening, Pure Original Sound : Experience studio-grade audio fidelity with nano-thin diaphragm and stealth magnets. Precision acoustics deliver high-resolution, low-distortion sound for live-performance realism

97mm Ultra-Large Diaphragm : Industry-leading 97mm driver at 2μm thickness reveals microscopic details. Magnetron-sputtered silver alloy coating enhances clarity while ensuring long-term sonic consistency and durability

Ergonomic Design, Long-Lasting Comfort : Memory-steel headband with multi-axis pivoting earcups adapts instantly. Silicone sliders enable micro-adjustments. Breathable protein leather ear pads eliminate fatigue during extended sessions

Refined Craftsmanship : Handcrafted walnut wood chambers paired with CNC-milled aluminum frame. Genuine sheepskin headband and signature S-design accents exude understated luxury and timeless sophistication

Precision Magnetic Control : 44 N50 neodymium magnets ensure razor-sharp transients. Acoustically transparent open-back grille minimizes resonance for expansive, holographic soundstage with studio-grade accuracy