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