Fostex TH616 Headphones

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Fostex TH616 Headphones

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Key info

  • Crafted from black walnut for structural rigidity and superior acoustic performance.
  • Features a 50mm dynamic driver unit with 1 Tesla flux density for wide dynamic range and minimal distortion.
  • Caution against prolonged high-volume usage to prevent hearing damage and discourage headphone use during activities requiring full alertness.
  • BIODYNA diaphragm, robust magnetic circuit, lightweight components, detachable connectors, and high-grade copper cable for superior comfort and sound isolation.
  • Assembled in limited quantities in Japan, celebrating Fostex’s 50th anniversary with meticulous craftsmanship.

All specifications

Physical characteristics
Weight Approx. 370 g (excluding cable)
Driver type 50 mm Neodymium Magnet
Impedance 25 ohm
Frequency response 5 – 45,000 Hz
Sensitivity 96dB/mW
Cable length 3m Y-type 2-pin (detachable connector rhodium plated)
Plug type 6.3mm gold-plated stereo standard plug
Openback / Closedback Open-back Dynamic
Included accessories
What's in the box TH616 Headphones, Cable, 6.3 mm Connector, Documentation

TH616 TH616 Open-Back Headphone

Specifically chosen for structural rigidity and exceptional acoustic qualities, the black walnut housing of the TH616 is carefully milled for each headphone to ensure exquisite clarity. Each opening in the outer cup deters resonance of particular frequencies to effectively eliminate modal vibrations.

Each TH616 features Fostex specially designed magnetic circuit loaded with a 50 mm dynamic driver unit offering a total flux density of 1 Tesla. This unlocks a wide dynamic range for listeners while minimising distortion during playback. Drawing on five decades of research and development, Fostex also blend bio-cellulose fibres into the headphone driver to ensure even higher resolution of mid to high frequencies.

Premium solid black walnut is carefully milled into a headphone housing, showcasing a design that beautifully echoes the artistry of traditional Japanese woodworking. These headphones are assembled one by one in limited quantities at a Japanese factory, marking a special commemoration of Fostex’s 50th anniversary.

Avoid an extended use at high volume levels as your hearing may be permanently impaired. You are advised never to use headphones in such situations as driving vehicle and cycling as your ability to react to emergencies will be considerably reduced.

Open-back housing to evoke the imagery of sunlight filtering through the trees

Elegantly crafted with a touch of Japanese aesthetics Carved from black walnut, a globally renowned wood Combines excellent structural rigidity with exceptional acoustic qualities The design draws inspiration from the captivating natural phenomenon where sunlight produces a radiant glow as it filters through the spaces amidst trees. This precision-machined design not only upholds structural rigidity but also effectively eliminates the generation of modal vibrations.

Each opening is meticulously sized to prevent resonance at particular frequencies

Leveraging years of accumulated expertise, bio-cellulose fibers are skillfully blended with other materials under optimal conditions. This results in achieving a low specific gravity, high Young’s modulus, and high internal loss. These properties enable the faithful reproduction of delicate, high-resolution, and beautiful mid-high frequencies. The inclusion of a free edge enables the accurate reproduction of low mid-range frequencies with substantial amplitude. *BIODYNA is registered trademark owned by Foster Electric Co., Ltd.

Exceptionally robust magnetic circuit

The magnetic circuit boasts a 50mm driver unit with an impressive magnetic flux density of 1 Tesla. This ultra-strong magnetic circuit ensures minimal distortion and a wide dynamic range.

High quality and lightweight mechanical parts

Aluminum is widely employed for mechanical components to attain a superior quality feel while keeping the product lightweight. Incorporating high-specific-gravity resin for the baffle plate effectively minimizes resonance noise, resulting in exceptional resolution, a lush mid-range, and high-quality bass reproduction.

Detachable connectors

The detachable headphone connection terminals are rhodium-plated to enhance hardness, abrasion resistance, and corrosion resistance, ultimately boosting their reliability.

High grade copper headphone cable

HiFC cables, constructed from pure copper and enhanced through specialized processing, are employed to ensure impeccable conductivity, enabling a precise rendition of the full spectrum of bandwidth. * “HiFC” is a registered trademark owned by Proterial, Ltd.

Premium artificial leather pad with a soft texture and a low-resilience cushion

It attains a superior comfort and exceptional sound isolation


  • Carved from black walnut, a globally renowned wood.
  • BIODYNA diaphragm made of ultra-fine bio-cellulose fiber material.
  • Exceptionally robust magnetic circuit.
  • High quality and lightweight mechanical parts.
  • Detachable connectors.
  • High grade copper headphone cable.
  • It attains a superior comfort and exceptional sound isolation.


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