Sennheiser CX 400BT white

NC, 20 h, Wireless
Ratings
BrandMore from Sennheiser
Test reportsVery good based on 7 tests
Delivered between Tue, 21.4. and Thu, 30.4.
Only 1 piece in stock at supplier
free shipping

Product details

Superior Sound. Tailored for You. Your daily life may change, but your enjoyment of superior sound remains. Powered by Sennheiser's leading audio technology, the new CX 400BT True Wireless gives you full control over an exceptional sound experience. With intuitive, customizable controls, long battery life, and a design built for all-day comfort, they are the ideal, uncompromising choice for those passionate about great sound.

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

Customizable Control. Manage your music, take calls, or activate your voice assistant with the customizable touch-sensitive technology integrated into both earbuds.

Codec Support. Enjoy outstanding sound quality, no matter which mobile device you use, thanks to our wide range of audio codec support, including AAC, aptX, and SBC.

Battery Life. Experience uninterrupted playback with a battery life of 20 hours – 7 hours on a single charge and an additional 13 hours via the charging case.

Ergonomic Design. Dive into your favorite music for as long as you want, with an ergonomic design that is made for all-day wear.

Key specifications

Application range
General
Noise cancelling
NC
Equipment + Functions
True Wireless
Signal transmission
Wireless
Headphone type
True Wireless headphones

General information

Item number
37400808
Manufacturer
Sennheiser
Category
Headphones
Manufacturer no.
508901
Release date
8.8.2023

Colour

Colour
White
Exact colour description
White

Application range

Application range
General

Headphone properties

Output
True Surround
Noise cancelling
NC
Equipment + Functions
True Wireless
Signal transmission
Wireless

Headphone type

Headphone type
True Wireless headphones
Fit
In Ear
Driver diameter
7 mm
Converter principle
Dynamic

Audio properties

Frequency range
5 - 21000 Hz

Bluetooth features

Bluetooth version
5.1
Bluetooth feature
AAC, aptX, SBC
Bluetooth profiles
A2DP, AVRCP, HFP, HSP

Power supply

Power supply
Battery operated

Battery properties

Battery life
20 h
Charging input
USB-C

Voluntary climate contribution

CO₂ emissions
29.26 kg
Climate contribution
CHF 0.70

Scope of delivery

Scope of delivery
1 piece

30-day right of return
24 Months Warranty (Bring-in)

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Goes with

Reviews & Ratings

Warranty score

How often does a product of this brand in the «Headphones» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 78.Creative
    3.2 %
  • 78.Fresh'N Rebel
    3.2 %
  • 78.Sennheiser
    3.2 %
  • 82.OnePlus
    3.3 %
  • 82.Suunto
    3.3 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 82.Edifier
    7 days
  • 82.Hifiman
    7 days
  • 84.Sennheiser
    8 days
  • 84.Suunto
    8 days
  • 86.B&O Audio
    9 days

Return rate

How often is a product of this brand in the «Headphones» category returned?

Source: Digitec Galaxus
  • 90.Marshall
    4.3 %
  • 93.AKG Pro
    4.4 %
  • 93.Sennheiser
    4.4 %
  • 95.Hama
    4.5 %
  • 96.FiiO
    4.6 %
Source: Digitec Galaxus

Translation: machine translated
Overall ratingVery good87/100
Very good88/100
CHIP OnlineSingle testReleaseMarch 2022
  • PositiveTop sound
  • PositiveExtensive customisation thanks to app
  • PositiveVery good price
  • NegativePurposeful processing
  • NegativeManageable equipment

In testing, the Sennheiser CX400BT TW in-ear headphones prove that they are in no way inferior to the higher-priced Momentum True Wireless 2, at least in terms of sound. The sound benefits from clear and full reproduction, combined with rich bass and present voices. The workmanship is not particularly high-quality, but the controls and the manufacturer's app are extremely comprehensive...

Very good98/100
MAC LIFE Logo
MAC LIFESingle testReleaseJune 2021
  • PositiveSound
  • PositivePrice/Performance
  • PositiveConfiguration options
  • NegativeClunky transport/loading box
  • NegativeTouch control sometimes tedious

We have not yet come across better in-ears at a comparable price.

This test report belongs to a different type: CX 400BT black (ANC, Wireless)
Very good94/100
Audio TestSingle testReleaseMarch 2021
  • PositiveBattery life
  • PositiveSound
  • PositiveDesign

    It is true that the CS 400 BT True Wireless does without some of the features of the Momentum True Wireless premium collection. However, no compromises have been made in the essential sound-producing components. Therefore, the newcomer is significantly cheaper, but no less powerful...

    Very good83/100
    Rank 2 out of 30Stiftung Warentest30 Bluetooth-KopfhörerReleaseFebruary 2021

    Wireless headphones tested Better without cables, say many headphone buyers. Bluetooth headphones do not require a connection cable - there are no more trip hazards. There are models in the classic design of a headphone with a headband and, as an alternative, in-ear headphones - tiny in size, but not in sound...

    Very good88/100
    PC Magazin Logo
    PC MagazinSingle testReleaseFebruary 2021

    Overall, Sennheiser's CX 400BT are convincing in the areas of sound, endurance and wearing comfort. However, for 200 euros, a few features are missing in this price range.

    This test report belongs to a different type: CX 400BT black (ANC, Wireless)
    Very good80/100
    connect Logo
    connectSingle testReleaseJanuary 2021
    • PositiveBalanced and neutral sound with little distortion
    • Positivegood workmanship
    • Positiveappealing design
    • Positivehigh wearing comfort
    • PositiveGood and intuitive operation
    • PositiveIntegrated equalizer