As audiophile product purchased following the rave reviews we read on "amazon.de". After pairing more affluent and fast, tested on jazz, classical and other: excellent rendering (if the source is setup with the equalizer), good power, good balance in all registers (no aggressive in treble bose), good spatial sound and low enough (thanks to the integrated passive radiators). Also of note is a very good battery life and a good Bluetooth range. In short, a very pleasant sound for all styles of music and non-fatiguing listening in duration. A really good quality / price ratio very sober look and 3 times less than a bose (ah dictatorship brands ...). Nothing to report negative, meets my needs perfectly.