Sony ULT Field 7

The Sony ULT Field 7 outperforms the competition! This is primarily due to its fresh and warm sound. However, the Bluetooth speaker also shines with its extensive features. Its robust housing and excellent battery life make it a welcome guest at any outdoor party. At around 6 kg, it is easy to carry.

Natural sounding bass, clearly audible details and balanced, lively sound - this is what the perfect speaker should sound like. However, good sound quality is not everything: Stiftung Warentest also expects a test-winning speaker to be easy to use, have a long-lasting battery and consume little power...

With its eye-catching design, Sony's speaker is the second most expensive model tested - but also the most feature-rich. The battery lasts up to 30 hours and is charged using the mains cable supplied. A USB-A port allows smartphones to be charged and serves as an audio input. Various connections are concealed behind a waterproof flap: Aux-in, microphone and even guitar input with level control...

In the speaker test, the best Bluetooth and WiFi devices score highly with their rich sound and ease of use. However, only a few offer this complete package. Natural sounding bass, clearly audible details and balanced, lively sound - this is what the perfect speaker should sound like...

Sony's Ult Field 7 boombox delivers plenty of power with clear sound and rich bass - but at 450 euros it's no bargain.