2 years international warranty
30 days free return
CX Plus SE True Wireless

CX Plus SE True Wireless

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Article number: 509247

True wireless sound that exceeds all expectations: With Sennheiser’s TrueResponse transducer and Active Noise Cancellation for distraction free listening enjoyment, the Sennheiser CX Plus SE True Wireless guarantees exceptional sound anywhere, every day. The new Special Design Edition features a brushed matte surface on the earbuds for an elevated and unique look.

Its smart features make life and listening effortless. Transparent Hearing lets you focus on external sounds when desired, while customizable touchpads ensure effortless control of audio, calls and voice assistant access.

The CX Plus SE True Wireless has been designed for all day use, with a sleek ergonomic design for fatigue-free all day wearing and up to 24 hours playback with on the go charging. Thanks to IPX4 rated splash resistance you can keep on enjoying the CX Plus SE True Wireless wherever you go.

General data

Wearing style

True wireless stereo earphones

Ear coupling

Ear canal


Bluetooth 5.2 compliant, class 1, 10 mW (max)

Supported profiles


Supported codecs

SBC, AAC, aptX™, aptX adaptive™

Speaker principle


Speaker size

7 mm diameter

Speaker frequency range

5 Hz – 21 kHz

Speaker sensitivity

114 dB SPL (1 kHz / 0 dBFS)

Speaker THD

<0.08% (1 kHz / 94 dB)

Speaker impedance

Not applicable (active BT headphones)

Active Noise Cancellation

Single mic ANC per earbud

Mic principle


Mic frequency range

100 Hz – 10 kHz

Mic pick-up pattern

2 mic beamforming per earbud

Battery lifespan

Up to 8 hrs music playtime with earbuds; Up to 24 hrs overall music playtime with charging case (test condition: iPhone, mid volume level, ANC/TH off)

Charging time

Approx. 1.5 hrs for fully charged;

After 10 min charging 1 hrs music playtime

Battery type

Built-in Lithium rechargeable batteries,

3.7 V left/right earbud: 55 mAh, charging case: 400-420 mAh

Power supply

5 V⎓, 600 mA max, USB charging via USB-C socket at charging case

Get perfect sound

First-class sound

Enjoy your music at home, at work or on the go with the bespoke TrueResponse transducer for perfect sound.

Block noise

With Active Noise Cancellation, immerse yourself in the clarity and details of your music and calls without distractions.

Stay aware

You’re in control of your sound: with the Transparent Hearing mode you can also focus on external sounds and stay in touch with the world around you.

Get maximum comfort

For your comfort

They are made for you: with their ergonomic design and ear adapters in 4 sizes, you will find the perfect fit for any activity.

Ease of use

Have everything under control from audio and phone calls to fast access to Siri and Google Assistant with the customizable touch controls.

Keep on playing

Want to listen all day long? With 8 hours of battery life and a further 16 hours extra with the charging case, you’ll have up to 24 hours of play time.

Just get the best

Deeper bass

Get into the groove with the adjustable Bass Boost activated via the Smart Control App.

Also when wet

Use them whenever you want, even in the rain: with their IPX4 splash resistance you don’t have to worry if it gets wet.


Dimensions Earbuds and charging case: 59 x 33.8 x 42.3 mm (2.3 x 1.3 x 1.6 in)
Weight 47g (both earbuds and charging case) 6g (single earbud) 35g (charging case)
Frequency response (Microphone) 100 Hz to 10 kHz
Microphone 2 mic beamforming arrays (4 mics in total)
Power supply 5 V⎓ 600 mA max
Speaker type TrueResponse Transducer Sennheiser 7mm dynamic driver
USB Standard USB-C
Noise cancellation Active Noise Cancellation
Package dimensions (L x W x H) 170 x 115 x 47 mm (6.7 x 4.5 x 1.85 in)
Ear coupling In-ear, closed acoustics
Charging time 1.5 h for full charge / 10 min for 1 h playtime
Battery Specification Built-in Lithium-Ion rechargeable batteries L/R earbud: ~55 mAh; charging case: ~400-420 mAh
Bluetooth Bluetooth 5.2 compliant. Class 1, 10 mW
Bass Boost Via Smart Control App
Battery time up to 24 hours overall playtime with charging case
App support Sennheiser Smart Control App for iOS™ and Android™
Supported Profiles A2DP, AVRCP, HFP
Codecs SBC, AAC, aptX™, aptX Adapative
Equalizer EQ pre-set via Smart Control App
Frequency response 5 hz - 21,000 Hz
Warranty 2 years

What's in the Box

  • CX Plus True Wireless Earbuds
  • Silicone ear adapter sets (XS, S, M, L)
  • Charging Case
  • USB-C Cable
  • Quick Guide & Safety Guide

Customer Reviews

Based on 12 reviews
Peter Fava
Excellent sound quality

These ear buds are comfortable and the sound is amazing.

Eirini Papachristopoulou

CX Plus SE True Wireless

Tetiana Havryliuk
Great sound

Great sound quality and microphone for a reasonable price. Dispatch and delivery was super fast. I’m satisfied with my purchase!

CX Plus SE True Wireless

Sennheiser CX Plus SE true wireless headphones offer an impressive audio experience in a compact and stylish design.The standout feature of the CX Plus SE is its exceptional sound quality. The headphones produce rich and well-balanced audio, with clear highs, detailed midrange, and satisfying bass. The CX Plus SE earbuds have a comfortable, lightweight design with different ear tip sizes for a secure and noise-isolating fit.The battery life of these headphones is impressive, 10 hours; although I haven't thoroughly tested this, these do last longer than my Apple ones. The case itself supports USB-C fast charging, ensuring quick and convenient recharging.Another notable feature is the intuitive touch controls on the earbuds. This does take a little getting used to, but you can control music playback, adjust the volume, and answer calls. The touch controls are responsive and easy to use. Sennheiser CX Plus SE true wireless headphones offer a great audio experience, comfortable fit, and convenient features. These headphones deliver impressive performance and are worth considering for your everyday listening needs.

Martin Scott

Bought these for my partner and she loves the fit and the sound quality is excellent.