HD 400 U

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 HD 400 U Desktop  HD 400 U Mobile

HD 400U

For more than 80 years, Sennheiser has stood for true sound. The HD 400U carries this legacy forward, delivering the unmistakable Signature Sennheiser Sound through a modern USB-C connection. No pairing. No batteries. Just pure, uncompressed audio, instantly.

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  • Signature Sennheiser Sound
  • USB-C digital plug-and-play connection
  • Removable cable system
  • Inline remote & microphone
  • Closed-back over-ear comfort

Features

  • True Sennheiser sound: Balanced tuning with clear mids, detailed highs, and controlled bass
  • Pure digital audio: USB C connection delivers stable, uncompressed sound without pairing or charging
  • Flexible listening: Removable cable system lets you use the included USB-C cable or switch to an optional analog cable
  • Stay connected: Inline remote and microphone for easy call handling and music control
  • Comfortable closed-back design: Lightweight, foldable construction with passive noise isolation and soft, replaceable ear pads
  • Built to last: Durable materials engineered for everyday reliability
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Sound that stays true

Hear music the way the artist intended.

At the heart of the HD 400U is the Signature Sennheiser Sound. Carefully tuned to be balanced and natural, it reveals emotional detail that standard headphones often miss. Clear and expressive mids, shimmering highs, and deep yet controlled bass combine to create a listening experience that feels authentic, immersive, and true to the music.

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Instant digital connection

Plug and play simplicity that lets the music speak.

The USB C digital connection delivers uncompressed audio directly from your device to your ears. With no pairing rituals or batteries to manage, the HD 400U offers a reliable, plug-and-play experience across compatible smartphones, tablets, laptops, and computers. Just connect and press play.

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Instant digital connection

Comfortable design, ideal to carry around.

Lightweight and secure, the HD 400U is built for hours of comfortable listening. The closed-back over-ear design provides passive noise isolation while allowing the sound to breathe. Soft, replaceable ear pads and a foldable construction make it ideal for work, travel, and everyday use.

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Instant digital connection

Flexible and functional

The removable cable system gives you the freedom to adapt to different devices. Use the included USB C cable with inline remote and microphone for calls and playback, or switch to an optional analog cable when needed.

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Any questions?

See all FAQs right here.

Learn More

Specifications

Ear coupling
Over-ear
Transducer principle
Dynamic
Acoustic principle
Closed
Plug
USB C
Cable length
1.4 m
Weight (headphone)
217 g
Headphones - Frequency response
18 – 20,000 Hz (-10 dB)
Headphones - Impedance
18 Ω
Headphones - Sound pressure level (SPL)
120 dB SPL @ 1 kHz, 1V RMS
Headphones - Total harmonic distortion (THD)
<0.5% (1 kHz, 100 dB SPL)
Microphone - Frequency response
100 – 10,000 Hz
Microphone - Pick-up pattern
Omni-directional
Microphone - Sound pressure level (SPL)
-44 dbV/Pa

What's included

  • One pair of HD 400U over-ear headphones
  • One USBC cable with inline remote and microphone
  • A quick guide to get you started

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