Sennheiser HD 4004

Sennheiser HD 4004

The HD 4004 (also written HD4004) is a monaural headphone manufactured by the Sennheiser Corporation. Here are some of its features and specifications.

  • Frequency Response: 100 Hz to 6 kHz
  • Impedance: 17 Ω (approx)
  • Nominal SPL (DIN 45 580): 94 dB
  • Mass (without cable): 16 g
  • Cable length: 7.5 m