Short answer: the KEF XIO. It ranks #2 of 27 all-in-one soundbars by sound quality, rated 4.0/5, at $1,999.99; the Devialet Dione ranks #6, rated 3.8/5, and costs $2,399, so there is not much of a tradeoff to weigh.
The case for the KEF XIO: The XIO sounds detailed and refined, with music that plays like a hi-fi system rather than a TV speaker. The catch: At least one detailed review heard a boxy midrange and some compression when pushed loud.
The case for the Devialet Dione: The Dione delivers deep, powerful bass from a single bar, so it suits rooms with no space for a subwoofer. The catch: It cannot add a subwoofer or rear speakers.
Buy the KEF XIO. It is rated higher for sound quality than the Devialet Dione and costs less, so only choose the other one for a particular feature it does better.
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The XIO sounds detailed and refined, with music that plays like a hi-fi system rather than a TV speaker.
The Dione delivers deep, powerful bass from a single bar, so it suits rooms with no space for a subwoofer.
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Specifications Side By Side
| KEF XIO | Devialet Dione | |
|---|---|---|
| Price | $1,999.99 | $2,399.00 |
| Ranked | #2 of 27 in All-in-One Soundbars | #6 of 27 in All-in-One Soundbars |
| Amplifier Power | 820W total (12 Class D) | 950W RMS |
| App | Yes (KEF Connect) | Yes (Devialet) |
| Aux Input | No | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Channels | 5.1.2 | 5.1.2 |
| DTS:X | Yes | No |
| Dimensions | 2.8”H x 47.6”W x 6.5”D (70 x 1210 x 165 mm) | 3”H x 47.2”W x 6.5”D (77 x 1200 x 165 mm) |
| Dolby Atmos | Yes (up-firing drivers) | Yes (up-firing drivers) |
| Drivers | Bar: 12 drivers (6 Uni-Q MX incl. up-firing, 2 full range, 4 P185 force-cancelling bass drivers) | Bar: 17 drivers (8 woofers, 9 full range incl. center orb and 2 up-firing) |
| HDMI Input | No | No |
| HDMI eARC | Yes | Yes |
| Included Subwoofer | Built-in | Built-in |
| Optical Input | Yes | Yes |
| Rear Speakers | No | No |
| Room Correction | Yes (Intelligent Placement Technology) | Yes (4-microphone calibration) |
| Weight | 23.1 lbs (10.5 kg) | 26.5 lbs (12 kg) |
| Wi-Fi | Yes (AirPlay 2, Google Cast, Spotify Connect, Tidal Connect) | Yes (AirPlay 2, Spotify Connect, UPnP) |
| Voice Assistants | - | No |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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