Sennheiser CX 350BT in the test

Sennheiser CX 350BT in the test © COMPUTER BILD, Sennheiser

The Sennheiser CX 360BT are aimed at the smaller budget. The test says whether the sound falls by the wayside.

The Sennheiser CX 350BT scored with good sound at a fair price. You play music in a balanced and natural way. Only the heights are a little too sharp and stand out a bit. The battery life is the best in comparison at just over 13 hours. However, the Sennheiser are lagging behind when it comes to wearing comfort. The plugs are very light, but sit deep in the ears and squeeze. In addition, the battery box interferes with sports.


  • Natural sound
  • Easy handling


  • Quiet on the smartphone
  • Sitting deep in your ear
UListening to music on the go or while exercising is easier than ever thanks to in-ear headphones with Bluetooth. The plugs are available as a completely wireless true wireless version or with a neck cable. The latter are usually cheaper and often offer a better battery life than their colleagues without a cord. The Sennheiser CX 350BT are in the price range below 100 euros and want to convince in the test. COMPUTER Bild took a closer look at the neckband headphones.

The best in-ear headphones

Wears well

The Sennheiser headphones sit well in the ear. They don’t fall out of your ears during sporting activities such as jogging or cycling. However, the headphones are also quite deep in the listener, which can be a little uncomfortable. The CX 350BT can be operated via a small control unit on the connection cable between the two plugs. The keys are easy to feel and playback and volume can be easily controlled.
Sennheiser CX 350BT in the test: wearing comfort © Sennheiser

The Sennheiser plugs sit tight, but also quite deep in the ear.

That’s how long the battery life is

An extensive workout or a long train ride? Neither is a problem for the CX 350BT. Your battery life in the test was 13 hours and seven minutes. No other headphones with a neck cord have been running for longer. Also the previous leaders Beats Flex have to admit defeat by a few minutes. The other side of the coin: Sennheiser puts the long-lasting battery in its own box in the middle of the connection cable. This creates a central center of gravity, but the battery clumps around a bit annoyingly in the neck during exercise.

Sennheiser CX 350 BT in the sound test

In terms of sound, too, they are on a similar level as the Flex. Although they are not characterized by a kicking bass, they can convince with a balanced and finely resolved sound. The highs are a bit sharp, but hissing S-sounds during the singing could not be heard. Attention: In general, for optimal sound from in-ear headphones, the rubber seals must fit the user’s ears as perfectly as possible. The Sennheiser CX 350BT react particularly sensitively to a less than ideal fit, then the bass fizzles out into nothing.

  • Natural sound
  • Easy handling
  • Quiet on the smartphone
  • Sitting deep in your ear

* The cheapest price may now be higher.




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