This is how they sound: The Plus version of the CX True Wireless not only looks similar to the cheaper version without the "Plus", but also sounds similar. However, I can hear a little more transparency and openness here. In combination with the pleasant wearing comfort, they are also suitable for longer listening sessions...
Sennheiser CX Plus
ANC, 8 h, WirelessOnly 4 items in stock at supplier
Product details
The CX Plus True Wireless exceeds all sound expectations with noise cancelling, effortless smart controls, and a sleek design for maximum comfort. The independent use of the earbuds allows for the left and right earbuds to be used individually or as a pair. The dynamic 7mm TrueResponse transducers, produced in Germany, deliver Sennheiser's signature sound quality. With a playback time of 8 hours and a total battery life of up to 24 hours via the charging case, the CX True Wireless offers an all-day audio experience – in any environment, thanks to passive noise cancellation and an ergonomic design for a secure fit in the ear. The Bass Boost feature allows for more intense bass, which can be activated with a special EQ preset through the Smart Control app.
Application range | Business, General, Travel |
Equipment + Functions | Microphones, True Wireless |
Headphone type | Bluetooth headphones, In Ear Headphones |
Signal transmission | Wireless |
Audio Connections | 1 x USB-C, Jack 3.5mm (1x) |
Noise cancelling | ANC |
Isolation | Closed |
Item number | 16812714 |
Manufacturer | Sennheiser |
Category | Headphones |
Manufacturer no. | 509188 |
Release date | 28.9.2021 |
Sales rank in Category Headphones | 1163 of 7971 |
External links |
Colour | Black |
Exact colour description | Black |
Material | Putos |
Operating system compatibility | Android |
Application range | Business, General, Travel |
Output | Stereo |
Noise cancelling | ANC |
Equipment + Functions | Microphones, True Wireless |
Signal transmission | Wireless |
Headphone type | Bluetooth headphones, In Ear Headphones |
Fit | In Ear |
Isolation | Closed |
Driver diameter | 7 mm |
Durability | Splashproof |
Protection type (IP code) | IPX4 |
Converter principle | Dynamic |
Membrane size | 7 mm |
Frequency range | 10 - 21000 Hz |
Sensitivity | 107 dB |
Max. noise level | 106 dB |
Audio Connections | 1 x USB-C, Jack 3.5mm (1x) |
Connections base/transmitter | USB-C |
Bluetooth version | 5.2 |
Bluetooth feature | AAC, aptX, SBC |
Bluetooth profiles | A2DP, AVRCP, HFP |
Power supply | Rechargeable battery operated |
Battery type | Li-ion |
Battery life | 8 h |
Capacity | 420 mAh |
Charging time | 1.50 h |
Charging input | USB-C |
CO₂-Emission | |
Climate contribution |
Weight | 12 g |
Length | 18 cm |
Width | 12 cm |
Height | 5 cm |
Weight | 188 g |
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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- 95.House of Marley4.7 %
- 96.Soundpeats4.8 %
- 97.Sennheiser4.9 %
- 98.Technics5 %
- 99.B&O5.3 %
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- 78.Shure7 days
- 80.Bose8 days
- 81.Sennheiser9 days
- 82.Fairphone11 days
- 82.Technics11 days
Return rate
How often is a product of this brand in the «Headphones» category returned?
Source: Digitec Galaxus- 78.Pioneer DJ4 %
- 79.Bose4.1 %
- 79.Sennheiser4.1 %
- 81.FiiO4.2 %
- 82.Beyerdynamic4.3 %
The Bluetooth headphone test provides results for 240 headphones with and without earpieces. Which ones sound strong, have good batteries and no harmful substances. New in Stiftung Warentest's headphone comparison: 26 current in-ear and boom headphones. Among them are models from Apple, JBL, Samsung and Sennheiser...
- Sennheiser-typical, wonderfully balanced sound
- Very long endurance
- Good and tight fit in the ear
- Simple and clear operation
- Effective passive attenuation and responsive ANC
- decent telephony acoustics
- Beautiful sound with good treble
- Stable ear support
- Configurable touch control
- High runtime
- IPX4 and ear detection
- Distant vocal presence

- Sennheiser-typical, wonderfully balanced sound
- Very long endurance
- Good and tight fit in the ear
- Simple and clear operation
- Effective passive attenuation and responsive ANC
- decent telephony acoustics
- Sennheiser-typical, wonderfully balanced sound
- Very long endurance
- Good and tight fit in the ear
- Simple and clear operation
- Effective passive attenuation and responsive ANC
- decent telephony acoustics