KEF XIO vs Klipsch Flexus Core 300

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XIO compared with Flexus Core 300

	KEFXIO	KlipschFlexus Core 300
Overview
Released
Released	July 2025	2025
Sound
Type
Type	Soundbar	Soundbar
Channels
Channels	5.1.2	5.1.2
Dolby Atmos
Dolby Atmos	Yes	Yes
Drivers
Drivers	Six 50 mm Uni-Q MX, two 50 mm full-range and four 50 × 180 mm P185 bass drivers with VECO control	Four 2.25 in front drivers, one 0.75 in horn-loaded tweeter, four 4 in top woofers, two 2.25 in discrete up-firing drivers and two 2.25 in side drivers, from the current V08 specification table. Its introductory prose instead calls the side drivers 2.5 in.
Amplifiers
Amplifiers	Twelve Class D amplifiers; 820 W instantaneous total power rating	Powered by Onkyo
Frequency response
Frequency response	34 Hz–20 kHz (±3 dB, measured at 85 dB/1 m); maximum SPL 102 dB at 1 m	43 Hz–20 kHz; maximum acoustic output 106 dB (maker)
Audio formats
Audio formats	Dolby Atmos, DTS:X, Sony 360 Reality Audio and MPEG-H	PCM; LPCM up to eight channels; Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos; DTS, DTS-HD and DTS:X
Room tuning
Room tuning	Intelligent Placement Technology; Default, Movie, Music, Direct, Dialogue and Night modes	Dirac Live with supplied measurement microphone; the included licence covers below 500 Hz, with a paid full-range upgrade (SoundStage). Movie/Music modes; three-band EQ; dialogue and night modes.
Connections
Wi-Fi
Wi-Fi	Yes	Yes
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	Yes	Yes
HDMI eARC
HDMI eARC	Yes	Yes
Voice assistants
Voice assistants	None	None
Wi-Fi
Wi-Fi	802.11a/b/g/n/ac/ax; 2.4, 5 and 6 GHz	Wi-Fi and Ethernet network connection
Bluetooth
Bluetooth	Bluetooth 5.3	–
Ports
Ports	HDMI 2.1 eARC, optical, service USB-C, Ethernet and RCA subwoofer output; no HDMI input	HDMI 2.1 passthrough input; HDMI eARC output; digital optical; USB-C service connection; USB-A Flexus transmitter connection; Ethernet; microphone input; RCA subwoofer output
Streaming
Streaming	AirPlay, Google Cast, UPnP, Spotify Connect, Tidal Connect and regional in-app services	Apple AirPlay 2; Google Cast; Spotify Connect; TIDAL Connect; QPlay; Bluetooth
Multi-room
Multi-room	Optional KW2 receiver for compatible wireless subwoofers. KEF still lists wireless rear-speaker support as a future firmware update.	Optional Flexus Sub 100/Sub 200 and Surr 100/Surr 200; supports up to two wireless subwoofers and two surround speakers
App
App	KEF Connect	Klipsch Connect Plus for iOS and Android; EQ, channel levels, room correction, streaming set-up and firmware updates
Design
Weight
Weight	10.5 kg	8.5 kg (better)
Controls
Controls	Top-panel power, source, mute and volume buttons with source, Wi-Fi, volume and codec indicators; supplied infrared remote with playback, source and customisable favourite and sound-profile buttons	Top power, source and volume controls; supplied BLE backlit remote; dimmable alphanumeric display. No built-in voice assistant (TechRadar).
Microphones
Microphones	–	Supplied external measurement microphone for room correction
Mounting
Mounting	Supplied wall-mounting kit and template	1/4 in × 20 threaded insert; optional slim-depth wall bracket sold separately
Size
Size	1210 × 70 × 165 mm (width × height × depth)	3 1/16 × 54 × 4 15/16 in (7.8 × 137.2 × 12.6 cm), H × W × D, from the current V08 sheet; sealed plastic and metal enclosure. TechRadar reports first retail availability in September 2025; the earlier winter launch target was preliminary.
Colours
Colours	Silver Grey or Slate Black	Black with ebony vinyl finish; Walnut option
In the box
In the box	Soundbar, remote, AAA batteries, 2 m HDMI cable, 2 m power cable, wall-mounting template and kit, and printed materials	Soundbar, BLE backlit remote, two AAA batteries, region-specific 2 m power cord, 1.5 m HDMI cable, measurement microphone and user manual