Sennheiser CX400

Sennheiser Releases CX 400BT True Wireless

Sennheiser has released their new, long-anticipated true wireless system: the CX 400BT. An upgrade to their previous CX 350, Sennheiser has said goodbye to cables, and hello to true wireless. With this new addition to Sennheisers’ true wireless family, they look to feature their companion “smart control” app heavily, as customization will play a main focus in the CX 400BT user experience.

True Wireless in white

Top 5 features 

• Immerse yourself in amazing sound quality thanks to Sennheiser’s unique 7mm dynamic audio drivers and personalize your audio experience with the built-in equalizer and the Sennheiser Smart Control app

• Manage your music, make calls or trigger the voice assistant with customizable touch-sensitive technology built into both earbuds

• Enjoy outstanding sound quality no matter your mobile device with our wide range of audio codec support including AAC, aptX and SBC

• Experience non-stop playtime with 20 hours of battery life – 7 hours on a single charge and a further 13 hours via the charging case

• Dive into your favorite music for as long as you like with an ergonomic design made for all-day wearing

Better sound. Better control.
Whether you’re in the mood for calming tunes or crave some thrilling beats, the bespoke drivers of the CX 400BT True Wireless deliver high-fidelity sound with deep bass, natural mids and a clear, detailed treble. Plus, you can personalize your listening experience with built-in equalizers to enjoy the amazing sound quality that’s tailored to you.

Second module:
Tune in. Switch off.
For those who always like to be on the ball, on the beat, and on-call, the customizable touch controls on both earbuds make it easy to enjoy a smarter and more connected life. The touch-sensitive interfaces provide fast access to voice assistants such as Siri and Google Assistant, as well as intuitive control of your music and calls.

Third module:
Premium sound. Any device.
No matter where you stand – iOS or Android – you’ll always get to enjoy the outstanding sound quality of the CX 400BT True Wireless earbuds. Thanks to our wide range of audio codec support including SBC, AAC and aptX, premium sound is guaranteed with any mobile device.

Anytime. All the time.
Never miss a beat throughout the day with 20 hours of battery life – 7 hours on a single charge and a further 13 hours with the small, sleek and compact charging case. The new CX 400BT True Wireless earbuds are designed to ensure you get premium sound wherever you go.

The CX 400BT True Wireless is made for those who enjoy diving into a long playlist, a lively audiobook or a loving phone call. Available in black and white, they have an ergonomic design created for all-day comfortable wearing.


CX400TW1 (Black / White)
ID Black Item: No 508900 / EAN 4044155251753
White Item: No 508901 / EAN 4044155251760
Ear Coupling: In-ear, closed acoustics
Speaker Type: Sennheiser 7mm dynamic driver
Frequency Response: 5 – 21,000 Hz
Sound Pressure Level (SPL): 107 dB
Total Harmonic Distortion (THD): <0,08% (1kHz / 94dB)
Battery Life Up to 7 hrs music playtime with earbuds
Charging Time: 1.5 h for full charge / 10 min for 1 h playtime
Wireless Connectivity: Bluetooth 5.1
Supported Profiles: A2DP, AVRCP, HSP, HFP
Supported Codecs: SBC, AAC, aptX™
Weight: 6 g (single earbud) / 37 g (charging case) / 49 g (total)
Warranty Period: 2 years

Sennheiser CX 400BT will coast $199.95 and is available for pre-order at Audio 46

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