That's how they sound: The CX True Wireless are better suited to the synthesiser sounds of Jean-Michel Jarre than to the guitar rattling of Spoon. They reproduce the synth sound clearly and powerfully, whereas the Spoon song lacks precisely this clarity in the bass range. For my taste, they could be a little louder.

For under 100 euros, you get above-average headphones with the Sennheiser CX True Wireless. Such high-quality sound with aptX support, extensive setting options and good operation are rarely found in this price range. Although the design of the headphones is not for everyone and the earpieces could sit even more securely in the ear, the headphones otherwise impress with a very good overall package.

The Bluetooth headphone test provides results for 240 headphones with and without earpieces. Which ones sound strong, have good batteries and no harmful substances. New in Stiftung Warentest's headphone comparison: 26 current in-ear and boom headphones. Among them are models from Apple, JBL, Samsung and Sennheiser...

The unmistakable Sennheiser sound makes the headphones a great purchase for enjoying your favourite music at any time. The minor weaknesses are hardly noticeable.

The podium is completed by the Sennheiser CX True Wireless. Only 0.4 points separate second and third place. At 129 euros, the cheapest in-ear headphones in the top three impress with a solid performance in the sound area, don't make any downward mistakes in workmanship and wearing comfort and even win the looks category...