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Expert reviews. One COR Score.
KEF XIO — Slate Black reviews
Brand: KEF
Current — Eligible UK new-sale evidence found in Google results. Checked 31 Oct 2026, 19:04 UTC
4.58out of 5
Compare KEF XIO — Slate Black reviews, specifications and available UK retailer offers. Check the details for this exact model and follow the original critics’ findings.
Manufacturer codeSP4083B0BA
The product, explained
About the KEF XIO — Slate Black
KEF XIO — Slate Black is a 5.1.2-channel soundbar in slate black. A separate subwoofer is not included. Dolby Atmos is among its supported audio formats. HDMI eARC supports an audio connection to a compatible TV. Wireless connectivity includes Wi-Fi and Bluetooth. The listed width is 1210 mm, a useful measurement when checking space below a television.
For KEF XIO — Slate Black, the recorded details include audio output channels: 5.1.2 channels; audio decoders: Dolby Atmos, DTS:X; subwoofer included: No. Use these facts to narrow a shortlist, then compare the reviewers’ findings on the features that matter for your use.
- Audio channels
- 5.1.2 channels
- Audio decoders
- Dolby Atmos, DTS:X
- Subwoofer included
- No
- HDMI eARC
- Yes
- Wi-Fi
- Yes
- Bluetooth
- Yes
Make it work for you
Before choosing the KEF XIO — Slate Black
Check ARC or eARC
Identify the TV HDMI port labelled ARC or eARC and read both manuals.
Plan bass and surrounds
Decide whether separate rear speakers or a subwoofer are realistic in the room.
Match included system parts
Check that included parts match the advertised system configuration.
Independent perspectives
Expert reviews 6
Independent ratings, converted to the same five-point scale. Each card links to the original review and identifies the available evidence.
What Hi-Fi?
5.00 / 5Original rating: 5 / 5
Family review of KEF XIO. The UK SP4083B0BA package is not identified as a separate test.
Read the full review ↗Checked 10 Oct 2026
Trusted Reviews
4.50 / 5Original rating: 4.5 / 5
Family review of KEF XIO. The UK SP4083B0BA package is not identified as a separate test.
Read the full review ↗Checked 10 Oct 2026
T3
5.00 / 5Original rating: 5 / 5
Family review of KEF XIO. The UK SP4083B0BA package is not identified as a separate test.
Read the full review ↗Checked 16 Oct 2026
WIRED
4.00 / 5Original rating: 8 / 10
Family review of KEF XIO. The UK SP4083B0BA package is not identified as a separate test.
Read the full review ↗Checked 16 Oct 2026
TechRadar
4.00 / 5Original rating: 4 / 5
Family review of KEF XIO. The UK SP4083B0BA package is not identified as a separate test.
Read the full review ↗Checked 8 Oct 2026
AVForums
5.00 / 5Original rating: 10 / 10
Family review of KEF XIO. The UK SP4083B0BA package is not identified as a separate test.
Read the full review ↗Checked 8 Oct 2026
More expert reviews
STEREO GUIDE
KEF XIO review: High-end soundbar with Dolby Atmos & Uni-Q MX
By Stefan Schickedanz. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
Hifi.nl
Review KEF XIO soundbar: een voorbeeld voor de rest
By Jamie Biesemans. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
StereoNET
KEF XIO Soundbar Review
By Michael Darroch. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
Sound & Vision
KEF XIO Dolby Atmos Soundbar Review
By Tom Norton. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
HiFiReport
KEF XIO Soundbar Review
By Gordon Lyn. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
Audioholics
KEF Aims High With $2,500 5.1.2 XIO Soundbar
By Jacob Green. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
The Telegraph
Kef XIO soundbar review: A great British TV speaker
By Kulwinder Rai. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
Independent reviews, made comparable
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Read our scoring methodology →Scale conversion · example
8/ 104.00/ 5
An illustration of conversion, not this product’s rating.
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Find the best fit by considering the score alongside the critic count, review dates, tested version and the strengths that matter to you. Eligible model-level reviews identify the tested configuration. Reviews of different hardware are shown separately and do not enter this product’s COR Score.
Know exactly what you’re buying
KEF XIO — Slate Black specifications
Manufacturer code: SP4083B0BA · Manufacturer product information · Checked 8 Oct 2026. Specifications belong to this exact model.
Key specifications
The main features to compare for this exact model. Missing details are not assumed.
| Audio channels | 5.1.2 channels |
|---|---|
| Audio decoders | Dolby Atmos, DTS:X |
| Subwoofer included | No |
| HDMI eARC | Yes |
| Wi-Fi | Yes |
| Bluetooth | Yes |
More product specifications
Open a section for the details that matter to you.
Connections & wireless1 detail
| Bluetooth version | 5.3 |
|---|
Design & dimensions5 details
| Product type | Soundbar |
|---|---|
| Product colour | Slate Black |
| Width | 1210 mm |
| Dimensions (W x H x D) | 1210 x 70 x 165 mm |
| Weight | 10.5 kg |
Specifications describe the supplied product data, not measured review results. Battery life, range and performance figures are source claims and can vary with use.
Build your shortlist
Compare other soundbars
More products in this category. Compare their exact features, original reviews and available offers alongside the KEF XIO — Slate Black.
| Product | Brand | Shown model | COR Score |
|---|---|---|---|
| Devialet Dione — Black reviews → | Devialet | Dione | 4.40/58 critic reviews |
| Razer Leviathan V2 reviews → | Razer | RZ05-03920100-R3G1 | 4.04/57 critic reviews |
| Bang & Olufsen Beosound Premiere reviews → | Bang & Olufsen | Beosound Premiere | 4.67/53 critic reviews |
| Creative Stage 360 — Black reviews → | Creative | Stage 360 | 4.33/53 critic reviews |
Your questions, answered
KEF XIO — Slate Black FAQs
How many expert reviews are available for KEF XIO — Slate Black?
This page currently includes 6 scored critic reviews. Each publisher counts once. Follow the review cards for the original verdict and the version that was tested.
What is the COR Score for KEF XIO — Slate Black?
The current COR Score is 4.58 out of 5, calculated from 6 distinct critics. Ratings are converted to a five-point scale and given equal weight; affiliate offers do not affect this calculation.
Which exact version does this page cover?
This page identifies KEF XIO — Slate Black using manufacturer code SP4083B0BA. Check that reference, configuration and supplied accessories against the retailer listing. Related-version reviews are labelled separately and do not contribute to this version’s score.
What is the listed audio output channels for KEF XIO — Slate Black?
The source specification records audio output channels as 5.1.2 channels. This is a specification, not an independent performance measurement. Check the exact model and the original critic reviews for real-world results.
What is the listed audio decoders for KEF XIO — Slate Black?
The source specification records audio decoders as Dolby Atmos, DTS:X. This is a specification, not an independent performance measurement. Check the exact model and the original critic reviews for real-world results.
Where can I compare prices for KEF XIO — Slate Black?
Use the retailer-offer section on this page for available matched offers. If no offer is shown, we do not currently have a verified price. Confirm model, stock, delivery and the final total at the retailer; coverage does not include every seller.
Do I need eARC?
It depends on the formats and devices you use. eARC can support higher-capability return audio when both products support it, but check the manuals rather than relying on the label.
Are more channels always better?
No. Placement, room acoustics, dialogue tuning and the programme matter. A well-reviewed simpler bar can be more satisfying than a poorly fitted larger system.
Can I add speakers later?
Only if the maker documents compatibility for that exact model family. Check the part number and current support page.
How should I use the specifications alongside reviews?
Use the recorded features to check compatibility and make a shortlist. Read the original reviews for measured performance, everyday use and the tested configuration.
Understand your options
Soundbar buying guides
Explore one topic in depth before making your shortlist.
Start with the complete buying guide →How to choose and place a soundbar for your TVA soundbar has to fit the room before its audio features matter. Measure the television stand, check the screen’s lower edge and decide where a subwoofer or rear speakers could actually go.HDMI eARC vs optical for a soundbarChoose the connection by the audio formats, control behaviour and sockets supported by both the exact television and soundbar.Do you need a soundbar subwoofer?Decide from desired bass, room placement, neighbours and listening level rather than package size alone.Dolby Atmos soundbars: channels, room and expectationsSeparate format decoding from the speaker geometry and room conditions that create a sense of height.