FOSI AUDIO i5 Open-Back Planar Magnetic Headphones
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The i5 was born from a 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.
FOSI AUDIO i5 Open-Back Planar Magnetic Headphones
- 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
SPECIFICATIONS
- 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
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