JBL Go 4

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...

If you are looking for a good-sounding Bluetooth speaker in a pocket-sized format, the JBL Go 4 is a guaranteed find. The small speaker has an appealing design, is extremely robust (and waterproof) and sounds well above its size - but you shouldn't expect miracles. Larger speakers sound far better...

The JBL Go 4 is one of the smallest Bluetooth speakers on the market, packed with functions and very robust. The sound is what you'd expect: flat and bland, but given the dimensions, it's still fine for those who want to listen at a lower volume. If you can spend a little more, you should opt for the Clip 5. It's slightly larger, but offers a much better sound.

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...