Sennheiser CX True Wireless Earbuds, 7mm Driver

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Build Aspect

Sennheiser CX True Wireless Earbuds are the budget sibling of the more premium CX Plus TWS Earbuds. The case is identical and therefore is a bit large. Additionally it is fabricated from dense plastic and the hinge has a reassuring feel to it. Similarly the earbuds are made of high quality plastic with a matte finish which gives them a neat look and a durable feel. Unfortunately the earbuds are large and protrude from the ears. Nonetheless thanks to a light weight build the fit is snug and comfort levels are good. The battery life on a single charge is 9 hours while the case is able to recharge them twice taking the total battery life to 27 hours. These TWS earbuds are available in color options of black and white.

Performance Aspect

The sound signature of these earbuds is quite alike the CX Plus TWS Earbuds ergo they sound dull and unimpressive. Lets divulge the intricate details for more clarity on the previous statement. Firstly, the bass is powerful and strong, it has good transients. On the other hand the pronounced bass has its after effects felt in lower mid range which is peaky. It gets better though as bulk of instruments and vocals sound airy as well as dynamic. Treble is again a spoil sport and is warm and veiled. It has the resolution but the output is masked under the heavy bass. All things said and done, it is a reasonably priced pair of TWS earphones and can be termed as a value for money buy especially if bass is your thing.

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


Comfy and sturdy fitting.
Solid build.
Good battery.


Earbuds protrude a bit.
Overall sound profile is dark.


CX True Wireless

Model: CX200TW1, CX200TW1 C, CX200TW1 L, CX200TW1 R

Wearing style

True Wireless stereo earbuds

Ear coupling

ear canal, closed-back

Frequency response

5 Hz to 21 kHz

Transducer principle


Transducer size

7 mm

Sound pressure level (SPL)

110 dB (1 kHz/0dBFS)

THD (1 kHz, 94 dB SPL)

< 0.08 %

Microphone principle


Microphone frequency response

100 Hz to 10 kHz

Microphone pick-up pattern (speech audio)

2-mic beamforming array

Power supply

built-in Lithium rechargeable batteries, 3.7 V

earbuds: 55-72 mAh

charging case: 400-420 mAh

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

Operating time

9 hrs with rechargeable battery of the earbud (test conditions: iPhone within 1 m distance, Bluetooth AAC codec, playback of mixed music, volume level 50 %, no EQ settings);

27 hrs with rechargeable battery of the charging case

Charging time of rechargeable batteries

approx. 1.5 hrs

Temperature range

operation: 0 to +40°C

storage: –25 to +70°C

Relative humidity

operation: 10 to 80%, non condensing

storage: 10 to 90 %

Magnetic field strength

earbuds: 64 mT

charging case: 177 mT


earbuds: approx. 6 g each

charging case: approx. 37 g



Bluetooth 5.2 compatible, class 1, BLE

Transmission frequency

2,402 MHz to 2,480 MHz





Output power

10 mW (max)


aptX®, AAC, SBC

Device name

CX True Wireless

Number of active connections



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