As far as the key feature of the headphone are concerned, the ANC works flawlessly and the difference is noticeable. With the ANC turned off, the audio may not sound pleasing. However, as soon as the ANC is activated, the difference is felt in terms of overall audio output and reduction in ambience noise levels. The ANC activation also creates a kind of vacuum inside the ear cups, which isn't apparent during music playback, but only when the headphones are idle. The ANC feature works even with wired connectivity. However, there is no respite to audio quality and it remains average with or without wired connection.