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[NAMM] Fostex launches headphones and amp

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Fostex TH-900
News Fostex TH-900

Studio headphone from Fostex

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Fostex completes its monitoring line with the TH-900 headphones that can be used with the HP-A8C headphone amplifier.

The TH-900 is the first high-end headphones from Fostex featuring the newly designed neodymium driver unit with1.5 tesla (15,000 gauss) magnetic circuit and bio-dynamic neodymium 50mm diaphragm, traditional Japanese lacquered “Urushi” finished craftsmanship housing and selected 7N OFC cable with gold plated 1/4" jack connector.


  • Driver: 50mm dia Nd magnet
  • Impedance: 25 ohm
  • Sensitivity: 100dB / mW
  • Maximum Input: 1,800 mW
  • Reproduction Frequency: 5 – 45k Hz

The headphones can be used with the new HP-A8C 2-channel headphone amplifier and 32-bit D/A converter equipped with a USB 2.0 port (requires a specific driver available for download from the Fostex website).


  • USB port with up to  32bit/192kHz resolution (24bit on Windows)
  • Digital (Optical) Inputs x 2: optical, square, S/PDIF (44.1kHz – 192kHz)
  • Digital (Coaxial) Input : RCA Pin S/PDIF (44.1kHz – 192kHz)
  • Analog Inputs: RCA Pin (L, R)
  • 2 Phone outputs: stereo 1.4" jack
  • Max Output: 700mW (32-ohm loaded)
  • Opt load Impedance: 16 ohm – 600 ohm
  • THD < 0.002% at 1kHz, 32-ohm loaded, 100mW
  • Frequency response: 10Hz – 80kHz +-0.3dB
  • Analog  Output: RCA Pin
  • Opt load impedance: more than 10k ohm
  • THD: less than 0.002% at 1kHz
  • Frequency response: 10Hz – 80kHz +-0.3dB
  • Digital Output: Optical, square S/PDIF
  • Built-in SD (SDHC) card drive for epoch-making DSD file (DSF format) reproduction in addition to the firmware update.
  • Oversampling x2 and x4
  • Digital Filter selection between conventional “sharp roll-off” and “minimum delay”
  • Direct Out mode bypassing the volume control circuit
  • Asynchronous mode by TCXO (Temperature Compensated Cristal Oscillator) clock
  • Selectable between the internal clock and the external clock (except for USB and SD card)
  • Variable headphone amplifier’s gain from 0dB to –12dB by 0.5dB step Dimensions: 213mm(W) x 78mm(H) x 314mm(D)
  • OLED Display
  • Weight: approx. 3.75kg

The amplifier ships with a remote controller

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