Fosi Audio i5 — Where Precision Meets Pure Sound

Step into a world of audiophile-grade listening with the Fosi Audio i5 Open-Back Planar Magnetic Headphones. Engineered for those who demand more from their music, the i5 delivers an expansive, holographic soundstage that places you at the heart of every performance. Whether you're mixing in the studio, gaming late into the night, or simply losing yourself in your favourite album, the i5 transforms every listening session into an immersive sonic journey.

Crafted with meticulous attention to detail, the i5 pairs a handcrafted walnut wood chamber with a CNC-milled aluminium frame and genuine sheepskin headband — a marriage of natural warmth and industrial precision. The breathable memory foam earpads and multi-axis pivoting earcups conform effortlessly to your head, ensuring hours of fatigue-free comfort. This is a headphone built not just to be heard, but to be worn and cherished.

At its core, the i5 houses a 97mm nano-thin planar magnetic driver — one of the largest in its class — delivering resolution and clarity that reveals the finest musical details. Backed by 44 N50 neodymium magnets and an acoustically transparent open-back grille, the i5 achieves a studio-grade soundstage with breathtaking accuracy and depth.

Key Features:

• 97mm Ultra-Large Planar Magnetic Driver — 2μm nano-thin diaphragm with sputtered silver alloy coating for exceptional clarity and long-term sonic consistency
• Expansive Soundstage — Open-back acoustically transparent grille minimises resonance for a wide, holographic listening experience
• 44 × N50 Neodymium Magnets — Ensures fast transient response and studio-grade accuracy
• Ergonomic Comfort Design — Memory metal headband, multi-axis pivoting earcups, silicone micro-adjustment sliders, and breathable memory foam earpads
• Refined Craftsmanship — Handcrafted walnut wood chambers, CNC-milled aluminium frame, genuine sheepskin headband with signature S-design accents
• Frequency Response: 10Hz – 50kHz — Captures the full spectrum of sound from deep sub-bass to ultra-high frequencies
• Impedance: 28Ω | Sensitivity: 98 dB/mW — Compatible with a wide range of amplifiers and DACs
• Dual Cable Options — Available with 3.5mm standard or 4.4mm balanced cable for superior stereo separation and noise rejection
• Weight: 550g — Substantial yet balanced build quality