Description
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.
- Signature Sennheiser Sound
- USB-C digital plug-and-play connection
- Removable cable system
- Inline remote & microphone
- Closed-back over-ear comfort
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.
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.
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.
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.
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
What's in the Box
- One USBC cable with inline remote and microphone
- A quick guide to get you started
Product Features
- Transducer principle: Dynamic
- USB C
- Microphone - pick-up pattern: Omni-directional
- Signature Sennheiser sound
- Removable cable system
- Inline remote & microphone
- Cable length: 1.4 m
- 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 - Sound pressure level (SPL): -44 dbV/Pa
Product Care
Protect your purchase with Product Care™. Get a brand new replacement if your product suffers an eligible fault through our hassle free support process, plus enjoy a range of exclusive benefits like a product health check and free prints each year so you experience your new product even more.
Discover all of the benefits Product Care™ brings you:
Protection
With Product Care™ you can relax knowing your purchase is protected. After an assessment, if your product suffers a fault covered by the terms of your plan, we’ll arrange to have a brand new replacement delivered to your doorstep.
Support
Our range of support options ensure you experience an easy and hassle free process when you need to talk to us about your Product Care™ plan. Whether you are experiencing a fault, or wanting to redeem your entitlements, we will provide you with guidance and support every step of the way.
Advantage
Having Product Care™ with your purchase means you can enjoy a range of special benefits that are exclusive to you and will help you enjoy the experience of your new product even more.
