Short answer: the Focal Mu-so Hekla. It ranks #4 of 27 all-in-one soundbars by sound quality, rated 4.0/5, at $3,600. The Devialet Dione ranks #6, rated 3.8/5, at $2,399, $1,201 cheaper, not enough of a saving to outweigh the sound-quality gap.
The case for the Focal Mu-so Hekla: A single-box Atmos system for people who want big, detailed sound without a separate subwoofer or rear speakers. The tradeoff: It is a deep, heavy slab that cannot sit under many TVs and will not support a TV on top.
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 tradeoff: It cannot add a subwoofer or rear speakers.
Buy the Focal Mu-so Hekla. It is rated higher for sound quality, and saving $1,201 with the Devialet Dione does not make up for the sound-quality gap.
Want more options? Browse the full TV Soundbars rankings.
A single-box Atmos system for people who want big, detailed sound without a separate subwoofer or rear speakers.
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
| Focal Mu-so Hekla | Devialet Dione | |
|---|---|---|
| Price | $3,600.00 | $2,399.00 |
| Ranked | #4 of 27 in All-in-One Soundbars | #6 of 27 in All-in-One Soundbars |
| Amplifier Power | 660W total | 950W RMS |
| App | Yes (Focal & Naim) | Yes (Devialet) |
| Aux Input | No | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.0 |
| Channels | 7.1.2 capable | 5.1.2 |
| DTS:X | No | No |
| Dimensions | 4.6”H x 39.4”W x 11.6”D (118 x 1000 x 295 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: 15 drivers (3 woofers, 2 midrange, 2 tweeters, 8 full-range side and top) | 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 (ADAPT) | Yes (4-microphone calibration) |
| Voice Assistants | No | No |
| Weight | 34.2 lbs (15.5 kg) | 26.5 lbs (12 kg) |
| Wi-Fi | Yes (AirPlay 2, Google Cast, Spotify Connect, UPnP) | Yes (AirPlay 2, Spotify Connect, UPnP) |
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