FiiO JT9 Open-Back Planar Magnetic Headphones

FiiO JT9 houses a custom-developed 95x86mm large planar magnetic driver. It features a vanishingly thin 1μm PET diaphragm. This expansive driver guarantees deep, authoritative bass extension and a vastly wide soundstage. The ultra-thin 1μm profile grants the diaphragm near-instantaneous transient response, allowing it to effortlessly reproduce the most delicate micro-details.

To achieve optimal acoustic performance, FiiO has implemented a patented Sapphire and Aluminum double-plating technology on the diaphragm. It is achieved by utilizing an advanced 28nm chip-level vacuum sputtering process. The aluminium layer reduces weight and enhances electrical conductivity, while the sapphire layer drastically increases rigidity, resulting in exceptional high-frequency clarity and a uniquely captivating timbre. This is paired with a patented uniform magnetic field design that utilizes custom curved magnets. By ensuring the voice coil experiences a completely even magnetic force, this dual-plated diaphragm virtually eliminates split vibrations, resulting in ultra-low distortion and pristine sound reproduction.

FiiO JT9 has an extremely lightweight design. The Headphone weighs just 365g, much less than the traditional full-sized planar magnetic driver headphones on the market. The chassis features a multi-axis adjustable headband with up to 90° of folding rotation, making it exceptionally compact for the included waterproof storage case. Combined with 3D asymmetrical ergonomic earpads that perfectly contour to the human face, the headset ensures an ideal seal, even clamping force, and absolutely zero fatigue during long listening sessions.

Features:

-Self-Developed 95x86mm Large Planar Magnetic Driver Headphones.

-Ultra-Thin 1μm PET Diaphragm for Lightning-Fast Transients.

-Patented Sapphire & Aluminium Dual-Plating Technology.

-Patented Uniform Magnetic Field Architecture.

-Advanced 28nm Chip-Level Vacuum Sputtering Process.

-High-Efficient Design with 95dB Sensitivity & 20Ω Impedance.

-Lightweight 365g Foldable Design.

-3D Asymmetrical Ergonomic EarPods with Multi-Axis Headband.

-Dual Custom 22AWG OFC Cables(3.5mm Single-ended & 4.4mm Balanced).