Fostex TH-919 open-back dynamic headphones

The Fostex TH-919 is a new open-back flagship dynamic headphone that combines a newly developed 50mm BioDyna driver with lightweight magnesium alloy components and a housing design inspired by traditional Japanese Kumiko woodwork, finished with authentic Japanese urushi lacquer craftsmanship by skilled artisans.

Type and Technology

Open-back dynamic headphone. Newly developed 50mm BioDyna driver with redesigned diaphragm geometry for improved frequency response, transient accuracy, and lower distortion across the full range. Lightweight magnesium alloy components including the housing base plate and hanger, reducing weight by approximately 20% compared to aluminum equivalents while eliminating excess vibration through rubber packing in the rotation mechanism. Detachable 2-pin cable with rhodium-plated connectors. High-purity OFC cable included.

Sound Character

Open, detailed, and natural in character, the new BioDyna driver continues the TH series tradition of organic tonal color and natural decay, with the open-back design providing a wide and airy presentation. The improved driver design brings cleaner transient response and extended frequency behavior relative to previous BioDyna implementations.

Build and Finish

The TH-919's visual identity is defined by two distinct elements: open-back housing panels with Kumiko-inspired geometric lattice detailing, and a traditional Japanese urushi lacquer finish applied by hand. Urushi is one of Japan's most historically significant craft materials, a natural lacquer with deep, luminous color and exceptional durability. The result is a headphone that is as much a cultural object as an audio instrument. Ergonomic ear pads with new materials and an asymmetric shape for optimized long-session comfort. Flexible natural leather head pad and headband.

Best For

Audiophiles who want an open-back dynamic flagship with genuine Japanese craft heritage, distinctive visual character, and Fostex's long-developed BioDyna acoustic engineering.

What's in the Box

• Fostex TH-919 headphones
• High-purity OFC cable
• Documentation

Specifications