Sennheiser HD 400

Sennheiser HD 400

These HD 400 (also written HD400) headphones were manufactured by the Sennheiser Corporation. Here are some of its features and specifications.

  • Open-air
  • Frequency Response: 20 Hz to 18 kHz
  • Impedance: 600 Ω
  • Nominal SPL (DIN 45 580): 90 dB
  • Mass without cable: 80 g
  • Cable length: 3 m