Wireless speakers can play music from many sources. Our wireless speaker test shows which speakers sound very good - and why expensive does not automatically mean good. The speakers are controlled via app or voice assistant. In the latest test, Stiftung Warentest tested twelve wireless speakers from Amazon, Audio Pro, Bang & Olufsen, Bose, Denon, Google, Ikea, Philips, Sonos, Sony, Teufel and Xiaomi.