In testing, the Sennheiser CX400BT TW in-ear headphones prove that they are in no way inferior to the higher-priced Momentum True Wireless 2, at least in terms of sound. The sound benefits from clear and full reproduction, combined with rich bass and present voices. The workmanship is not particularly high-quality, but the controls and the manufacturer's app are extremely comprehensive...

We have not yet come across better in-ears at a comparable price.

It is true that the CS 400 BT True Wireless does without some of the features of the Momentum True Wireless premium collection. However, no compromises have been made in the essential sound-producing components. Therefore, the newcomer is significantly cheaper, but no less powerful...

Overall, Sennheiser's CX 400BT are convincing in the areas of sound, endurance and wearing comfort. However, for 200 euros, a few features are missing in this price range.

Wireless headphones tested Better without cables, say many headphone buyers. Bluetooth headphones do not require a connection cable - there are no more trip hazards. There are models in the classic design of a headphone with a headband and, as an alternative, in-ear headphones - tiny in size, but not in sound...