The Linkbuds WF-L900 combine smart functions with a successful sound that even surpasses the Bose headphones for our taste. Conceptually, however, the Sony device is closer to an in-ear than an open-ear headphone - this has many advantages in terms of sound, but it is not quite as reliable in traffic.

The imperceptible in-ear is sensitive to its surroundings and ergonomically designed for continuous use. Despite the sophisticated app, there is still room for improvement in the sound quality.

A look at the comparison protects you from making a bad purchase: the foam earplugs of two new models were heavily contaminated with pollutants, another pair of headphones failed the drop test. In addition to the test winners, our headphone comparison offers a lot of other good devices, some of which are inexpensive...

The "hole principle" has its weaknesses in terms of sound; other (equally expensive) in-ears are better. On the other hand, the wearing comfort and "transparency", i.e. the participation in the environment, are good. The in-ears also sit quite firmly, thanks to the flexible earpieces. Recommended especially for group work - but not as noise protection.

... The sound in the bass range is not as powerful as with in-ears that close the auditory canal, but it is clear and differentiated. The acoustics during phone calls are just as convincing as the adaptive volume control and the controls: the playback can be stopped by tapping the jawbone in front of the ear, which works surprisingly well...

Among the six sports companions, there are suitable training partners for all occasions and budgets. The Teufel Airy Sports beat the Skullcandy Push Active in terms of sound and water protection, despite the annoying cable between the earphones. For more quiet sports in the dry, the Linkbuds from Sony are the best choice...