Sennheiser HD400S Closed-Back Over-Ear Dynamic Headphones

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HD 400S from Sennheiser are closed-back, over-ear (circumaural) dynamic foldable headphones.

Featuring a one-button smart remote control, conveniently located on the cable. Control music and take calls with ease, and the sturdy folding design makes these headphones durable and compact enough to be taken anywhere.

Sennheiser dynamic drivers deliver a well-extended sound response with dynamic, present bass. Available in black finish only.


  • Renowned Sennheiser sound quality for a unique listening experience.
  • Built-in microphone and remote for call and music control.
  • Closed-back around-ear headphones reduce unwanted background noise for your comfort.
  • Lightweight, foldable headphones for easy on-the-go storage.


  • Impedance: 18 Ω
  • Frequency Response (Microphone): 100 – 10,000 Hz (-10 dB)
  • Frequency Response (Headphones): 18 – 20,000 Hz (-10 dB)
  • Sound Pressure Level (SPL): 120 dB (1 kHz / 1 Vrms)
  • THD: <0.5% (1 kHz / 100 dB)
  • Ear Coupling: Over-Ear
  • Jack Plug: 3.5 mm angled
  • Cable Length: 1.4 m
  • Transducer Principle: Dynamic
  • Weight: 217 g
  • Pick-Up Pattern: Omnidirectional
  • Microphone Sensitivity: -44 dbV / Pa
  • Acoustics: Closed-Back
  • Sensitivity: 120 dB SPL @ 1 kHz, 1 V RMS


  • HD 400S circumaural headphones
  • RCS 400 detachable single-sided cable with 1-button remote and 3.5 mm angled plug

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Headphone Features

Transducer Type:
Dynamic Driver
Ear Cup:
Closed Back
Headphone Type:
  • Foldable Headphones
  • Over Ear Headphones
Frequency Range:
18 - 20,000
Cable Length (m):


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