
The tap gestures work great, but you’re limited to only two sets of controls at a time. Each side can control either noise cancelling, volume or playback via the touch panel. The music pauses/plays when removing one earbud. The excellent Headphones Connect app on Android and iOS handles sound modes, the equaliser, settings and updates, and shows the battery level of the earbuds and case. Testing in congested areas was not possible, however, because of the Covid-19 situation in the UK. The connection to a Samsung Galaxy S21 Ultra, iPhone 12 Pro and Surface Pro 7 was rock-solid in the home and on the street.

They only connect to one device at a time, but can seamlessly switch between them without having to manually disconnect from each one first. But like Sony’s high-end over-ear headphones, the XM4 support the high-resolution LDAC audio format that is compatible with many Android devices for some of the highest-quality Bluetooth audio available, making them some of the first earbuds to do so.


They support the universal SBC and AAC Bluetooth audio formats used by most devices. The earbuds have Fast Pair with Android, Swift Pair with Windows PCs or standard pairing with Apple and other devices. The touch panel on the outside of each bud supports single, double, triple and tap-and-hold gesture controls.
