Fostex TH910 Closed-Back BioDyna Headphones

TH910 Closed-Back BioDyna Headphones — A New Closed-Back Flagship from Fostex

The TH910 is Fostex’s next-generation closed-back flagship, combining a newly developed 50 mm BioDyna driver with lacquer-finished hard-maple housings and lightweight magnesium-alloy mechanical parts. It is built for listeners who want authoritative low-frequency reach without surrendering midrange clarity or fine texture.

Fostex revised the driver edge and magnetic system to stabilize excursion, tighten bass and reduce unwanted resonance. Traditional Japanese lacquer work gives every housing visual depth, while the redesigned frame and ear-pad geometry improve long-session comfort and mechanical stability.

Every Detail Matters

• New-generation 50 mm BioDyna dynamic driver
• Closed-back hard-maple housings with traditional lacquer finish
• Lightweight magnesium-alloy structural parts
• Detachable dual-entry 7N-grade OFC cable

Key Specifications

• Type: Closed-back dynamic
• Driver: 50 mm neodymium / BioDyna diaphragm
• Impedance: 25 Ω
• Sensitivity: 100 dB/mW
• Maximum input: 1,800 mW
• Frequency response: 12.5 Hz–45 kHz

System Pairing

These are revealing full-size headphones. A capable headphone amplifier will provide the current reserve, control and low noise needed to hear their full dynamic range. Contact PPA if you would like help matching them to your source or amplifier.

What’s in the Box

• TH910 headphones
• 2 m 7N-grade OFC unbalanced cable
• Synthetic-leather pouch
• Manufacturer documentation

Authorized Canadian Fostex Dealer
Princess Pasta Audio supplies genuine Canadian-market Fostex products with authorized dealer support. Available on order; ships within 10 business days.