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Sennheiser HD 400U
Closed-back circumaural headphones with integrated remote control and microphone – detachable USB-C cable
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HD 400U: Pure, instant sound without compromise
Discover the Sennheiser HD 400U circumaural headphones, the perfect combination of sound quality and simplicity. With their plug-and-play digital USB-C connection, these headphones deliver pure, uncompressed sound that is ready to listen to as soon as you plug them in. No batteries, no apps. With them, you can enjoy Sennheiser sound without waiting. Their comfortable, closed-back design surrounds your ears for passive noise isolation, ideal for fully enjoying your music, podcasts or calls, whether at home, in the office or on the go. With a built-in remote control and microphone, you can easily control your audio and stay connected in any situation. Reliable, robust and built to last, the HD 400U embodies Sennheiser's acoustic expertise in a practical and accessible format.
Clear mids, detailed highs and controlled bass
The HD 400U headphones deliver true Sennheiser sound. They offer a balanced sound with clear mids, detailed highs and well-controlled bass. The USB-C connection on the HD 400U headphones delivers stable, uncompressed sound without the need to connect or charge anything. If you want flexible listening, the detachable cable system allows you to use the supplied USB-C cable or switch to an optional analogue cable. The integrated remote control and microphone allow you to easily manage your calls and control your music. The HD 400U is a comfortable, closed-back model. It is lightweight and foldable. It offers passive noise isolation and soft, replaceable ear pads. The HD 400U is built to last. It has been equipped with durable materials for much better everyday reliability.
Key features:
- Closed-back circumaural headphones
- Transducers: 32 mm dynamic
- Connectivity: USB-C
- Frequency response (headphones): 18–20,000 Hz (-10 dB)
- Impedance: 18 O
- Sound pressure level (SPL): 120 dB SPL at 1 kHz, 1 V RMS
- Total harmonic distortion (THD) <0.5% (1 kHz, 100 dB SPL)
- Frequency response (microphone): 100–10,000 Hz
- Directivity (microphone): Omnidirectional
- Microphone sound pressure level (SPL): -44 dbV/Pa
- Detachable cable length: 1.4 m
- Weight (headset): 217 g
- 1x HD 400U headphones
- 1x USB-C cable with integrated remote control and microphone
- 1x quick start guide
Select your criteria
General information |
Product name |
Sennheiser HD 400U |
Brand |
Sennheiser | |
Model |
800126 | |
Design |
Headset type |
Over-Ear |
Headphones configuration |
Open back | |
Ear coupling |
Circumaural | |
Use |
Hi-Fi | |
Foldable |
Yes | |
High-Res audio |
No | |
Active noise cancelling |
No | |
Audio specifications |
Speaker diameter |
32 mm |
Bandwidth (Min frequency) |
18 Hz | |
Bandwidth (Max frequency) |
20 kHz | |
Impedance |
18 Ohm | |
SPL Max |
120 dB SPL | |
Harmonic distortion |
0.5 Percent | |
Connectivity |
Remote control |
No |
Volume control |
No | |
Connector(s) |
USB Type C | |
Cable length |
1.4 m | |
Wireless |
Wireless |
No |
True Wireless |
No | |
Bluetooth |
No | |
NFC |
No | |
Integrated voice assistant |
Without voice assistant | |
Physical characteristics |
Color |
Black |
Headphone weight |
217 g | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
|
Safety Information |
Responsible person |
Sonova Consumer Hearing GmbH |
Postal address |
Sonova Consumer Hearing GmbH Am Labor 1 CP : 30900 Wedemark, Allemagne | |
Electronic Address |
product-safety@sennheiser-hearing.com |
See all Sennheiser products
Product referenced on 5 Feb 2026
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