Sennheiser CX Plus True Wireless Earbuds TWS, 7mm Driver

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Build Aspect

Sennheiser CX Plus True Wireless Earbuds are precision crafted squarish looking pair of earphones. The case is bulky one and is made of dense plastic, it has a reassuring feel to it. Similarly the earbuds are made of high quality plastic with a gloss finish which gives them a durable feel. Moreover the earbuds are large and protrude from the ears. However thanks to light weight build the fit and comfort levels are good. The battery life on a single charge is about 8 hours while the case is able to juice them up twice over taking the total battery life to 24 hours. The TWS earbuds are available in color options of black and white.

Performance Aspect

Where do we start? Should we say we are not impressed and be done with it? No, we will lay out the specifics for better understanding. These earbuds have a solid and punchy bass, however it rolls of early. As a result lower lows are lacking which is usually associated with rumble. Mids are good and sound natural mostly. Alas a unwarranted dip in higher mids cause the vocals and certain instruments to sound lackluster. Treble here plays the role of Satan literally, its wreaks havoc in the sound profile. It is dull, boring and takes out all the energy from tracks. As a result the overall sound profile sounds dark and bass heavy. Not all is bad as at least ANC is not a deal breaker and works sufficiently well. All in all these wireless earbuds should be considered only if you are looking at earphones with a bass heavy profile.

Also: View A Pair of Top-Rated Earbuds on Amazon before finalizing.


Attractive design.
Comfy and sturdy fitting.
Solid build and decent ANC.


Dull and unimpressive sound profile.
Ear buds protrude.



Wearing style

True Wireless stereo earbuds

Ear coupling


Frequency response

5 Hz to 21 kHz

Transducer principle


Transducer size

7 mm

Sound pressure level (SPL)

114 dB (1 kHz/0 dBFS)

THD (1 kHz, 94 dB SPL)

≤ 0.08 % (1 kHz, 94 dB)

Noise cancellation

ANC technology with one pick-up microphone

Microphone principle


Microphone frequency response

100 Hz to 10 kHz

Microphone pick-up pattern (speech and ANC)

2-microphone beamforming array for active noise cancellation per earbud

Power supply

built-in lithium rechargeable batteries,

3.7 V

earbuds: 55 mAh

charging case: 400 – 420 mAh

USB charging via USB-C socket of the charging case: 5 V , 600 mA

Operating time

8 hrs with rechargeable battery of the earbud

24 hrs with rechargeable battery of the charging case

(test conditions: iPhone within 1 m distance, Bluetooth AAC codec, volume level 50 %, Transparent Hearing off, ANC off, no EQ settings)

Charging time of rechargeable batteries

approx. 1.5 hours for full charge

approx. 10 minutes for 1 hour of music playback

Temperature range

operation: 0 to +40°C

storage: –20 to +60°C

Relative humidity

operation: 10 to 80 %, non condensing

storage: 10 to 90 %

Magnetic field strength

earbuds: 0.7 mT

charging case: 39 mT

Ingress protection of the earbuds

splash proof (IPX4)


earbuds: approx. 6 g each

charging case: approx. 35 g

Both earbuds and charging case: 47 g



Bluetooth 5.2 compatible, class 1

Transmission frequency

2,402 MHz to 2,480 MHz





Output power

10 mW (max)


aptX®, aptX adaptive®, AAC, SBC

Device name

CX Plus True Wireless


  1. Samarth

    proper bass earphones.

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