When KEF debuted the XIO soundbar last year, it earned widespread acclaim for its sonic performance, though critics noted a singular shortcoming: its audio footprint was strictly confined to the front of the room. While the unit excelled at crafting a three-dimensional soundstage, it lacked the physical rear-channel presence necessary to fully immerse listeners in complex Dolby Atmos, DTS:X, or Sony 360 Reality Audio mixes. Today, KEF effectively eliminates that limitation with a transformative software update.

Expanding the Soundstage

Beginning November 5, 2026, the XIO receives a firmware boost that allows it to pair with select KEF speakers, repurposing them as dedicated wireless rear channels. This update immediately unlocks compatibility with the LSX II, LSX II LT, and Coda W series. KEF has also outlined a roadmap for further expansion, with LS50 Wireless II support arriving in Q4 2026, followed by the LS60 Wireless and LS Luxe models in Q1 2027.

System Requirements and Calibration

To transition the XIO into a true 5.1.2-channel system, users must utilize the integrated wireless transmitter within the soundbar alongside the KW2 RX receiver—the same hardware previously utilized for subwoofer connectivity—priced at $199.99/£149. The setup process is managed entirely through the KEF Connect app, requiring no professional intervention. Once configured, the system leverages KEF’s Intelligent Placement Technology to calibrate the expanded array to the unique acoustic properties of your living space, moving beyond the limitations of virtualized surround processing.

Investment Overview

The XIO soundbar remains available for $1,999.99/£1,999. The expanded rear-channel options are priced as follows:

  • LSX II: $1,499.99/£1,249 per pair
  • LSX II LT: $999.99/£899 per pair
  • Coda W: $999.99/£799 per pair
  • LS50 Wireless II: $2,199.99/£2,199 per pair
  • LS60 Wireless: $5,999.99/£4,999 per pair
  • LS Luxe: $3,999.99/£3,500 per pair