Fostex at Audio46

Fostex TH-616 Premium Limited Edition Open-Back Headphones




Product SKU: th-616


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Product Details

Audio46's Opinion

The TH-616 presents a flawlessly clean profile and a memorable tuning that is distinct from so many other headphones in this echelon. If you are particularly sensitive to lower treble frequencies, the mids might start to get a little tiring. But if you appreciate a vibrant and luminous midrange, there are few other headphones that deliver it this well. Add to that an uber-detailed, fast bass and easy highs, and you have a refreshing sound signature that becomes more compelling the longer you listen.

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↓ Details provided by Fostex

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.

Fostex TH-616 Premium Open-Back Headphones Overview

Open-back housing evokes the imagery of sunlight filtering through the trees

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.

Fostex TH-616 Premium Open-Back Headphones Open-Back Detail

BIODYNA diaphragm made of ultra-fine bio-cellulose fiber material

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 a 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.

Fostex TH-616 Premium Open-Back Headphones Side View

Detachable connectors

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

Pure copper headphone cable: High-FC 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.

"Hi-FC" is a registered trademark owned by Hitachi Metals, Ltd.

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

For superior comfort and exceptional sound isolation


  • Type: Open-back Dynamic
  • Driver: Φ50mm Neodymium Magnet / BIODYNA Diaphragm
  • Impedance: 25 ohm
  • Sensitivity: 96dB/mW
  • Max Input: 1,800mW
  • Freq. response: 5 – 45,000 Hz
  • Weight: Approx.370g (excluding cable)
  • Cable: 3m Y-type 2-pin (detachable connector rhodium plated)
  • Detachable terminal: 2-pin (rhodium-plated on the gold-plated base)
  • Plug: Φ 6.3mm gold-plated stereo standard plug
  • Accessories: Leather pouch, Owner's Manual

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