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Fosi Audio

i5 Open-Back Planar Magnetic Headphones

i5 Open-Back Planar Magnetic Headphones

$799.99 CAD
$799.99 CAD
Sale Sold out
  • 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

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

What's in the box?

  • i5 Headphone
  • 6.35mm Adaptor
  • 3.5mm Cable
  • User Manual
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