Fostex TH-909 Premium Open Reference Headphones



  • Driver: Dynamic, 50mm
  • Operation Type: Open back
  • Impedance: 25 ohm
  • Sensitivity: 100dB/mW (at 1kHz, 1mW)
  • Freq. response: 5Hz – 45kHz


TH909 is a flagship premium headphones based on the reputed closed type TH900mk2.  While keeping the same sound characteristic, we further expanded and increased its sound field by adopting open back construction and adjusting the acoustic circuit design.

Main Features

  • Offers a wider dynamic range with low distortion using 1.5 Tesla 50mm driver with repulsion magnet
  • Proprietary “Biodyna” technology
  • Double layer structure etching metal grills
  • Housing cover uses Japan Lacquer Bordeaux finish


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