Lewis CaliburnKEF has announced a software update that expands its XIO soundbar into a wireless surround sound system with true 360º spatial depth.
XIO owners can now experience cinematic sound with spatial depth thanks to the added physical rear channels. By pairing the soundbar with the KEF LSX II, LSX II LT and Coda W wireless HiFi speakers via the KW2 RX Receiver, XIO becomes an immersive yet minimal surround sound setup for the home.
Surround sound, without the wires
XIO arrives with the upgrade of physical rear channels. The wireless transmitter is built into the soundbar itself, and the KW2 RX Receiver carries the sound across the room to compatible KEF wireless speakers.
Launched in 2025, XIO was KEF’s first wireless soundbar, offering an immersive three-dimensional sound experience from one piece which includes audio innovations such as Uni-Q MX and VECO technology alongside 12 Class D amplifiers and 820W of power.
With built-in Wi-Fi, AirPlay, Google Cast, Bluetooth 5.3 and support for services including Spotify, TIDAL and Qobuz, XIO is designed to be as compelling for music as it is for films.
Conceived as a single component rather than a box of features, XIO brings the auditory experience of KEF’s HiFi speakers to the television: an aluminium topped bar in Silver Grey or Slate Black, designed to sit beneath a screen or on a wall and complement any room.
This update lets the experience progress from a virtual surround experience, thanks to advanced audio processing in the XIO soundbar, to a physical one with the addition of a discrete speaker placed behind the listener.
A system that grows with your space
Expanding the system is as much a design decision as an acoustic one, with KEF’s sleek wireless speakers as the rear channels. Owners can begin with XIO alone as a sleek centrepiece beneath the television, then add speakers as their space, or their taste, develops.
KEF’s colour-rich wireless range makes those speakers part of the palette rather than an intrusion into it. Colourways such as the Coda W in Moss Green or LSX II in Amber Haze complete a room the way a considered piece of furniture would.
Setup is guided through the KEF Connect app, helping users pair compatible speakers and configure them as dedicated rear channels without professional installation. A KW2 RX receiver is required to link the primary rear speaker to XIO.
Rear speaker compatibility will become available in three phases:
LSX II, LSX II LT and Coda W: available immediately.
LS50 Wireless II: available in Q4 2026.
LS60 Wireless and LS LUXE: available in Q1 2027.
Subwoofers: KC62, KC92 and KUBE.