Devialet Dione Opera vs KEF XIO Slate Black
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Choosing between the Devialet Dione Opera and KEF XIO Slate Black? Both compete in the Soundbar segment. Here’s how they compare across the specs that matter most for your home theater.
Pricing for both models is currently unavailable. Check the retailer links below for current deals.
Looking at overall performance dimensions: The Devialet Dione Opera scores higher in room fit. The KEF XIO Slate Black leads in value, form factor. They score similarly in ease of use.
These two Soundbar options trade wins across different dimensions. The right choice depends on which specs matter most for your room and listening preferences — review the detailed table below to decide.
For most home theaters, the KEF XIO Slate Black is the stronger choice — it leads in 2 of 4 scored dimensions. The Devialet Dione Opera makes more sense if you prioritize the 1 dimension where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Channel Config | 5.1.2 | 5.1.2 |
| Total Power (RMS) | 950W | 820W |
| Driver Count | 17 | 12 |
| Freq Response Low | 24Hz | — |
| Freq Response High | 21000Hz | — |
| Passive | No | No |
| Dolby Atmos | Yes | Yes |
| Dolby Digital+ | Yes | Yes |
| Dolby TrueHD | No | Yes |
| DTS:X | No | Yes |
| DTS Virtual:X | No | No |
| DTS-HD Master | No | No |
| Built-in Sub | Yes | No |
| Wireless Sub Included | No | No |
| Wireless Sub Support | Yes | Yes |
| Wireless Surround Support | Yes | Yes |
| HDMI eARC | Yes | Yes |
| HDMI Inputs | 1 | 1 |
| HDMI Version | 2.1 | 2.1 |
| Optical Input | Yes | Yes |
| Analog Stereo In | No | No |
| Sub Pre-Out | No | Yes |
| Ethernet | Yes | Yes |
| Bluetooth | Yes | Yes |
| BT Version | 5.0 | 5.3 |
| Wi-Fi | Yes | Yes |
| Wi-Fi Standard | Wi-Fi 5 | Wi-Fi 6 |
| AirPlay 2 | Yes | Yes |
| Chromecast | Yes | Yes |
| Spotify Connect | Yes | Yes |
| Voice Assistants | ||
| Room Calibration | Room Calibration | KEF Connect |
| Dialog Enhancement | Yes | Yes |
| Night Mode | Yes | Yes |
| App Control | Devialet | KEF Connect |
| Wall Mountable | Yes | Yes |
Key Differences
- Driver Count: Devialet Dione Opera at 17 vs KEF XIO Slate Black at 12
- Total Power (RMS): Devialet Dione Opera at 950W vs KEF XIO Slate Black at 820W
- BT Version: Devialet Dione Opera at 5.0 vs KEF XIO Slate Black at 5.3
- Freq Response Low: Devialet Dione Opera at 24Hz vs KEF XIO Slate Black at —. Determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support.
- Freq Response High: Devialet Dione Opera at 21000Hz vs KEF XIO Slate Black at —
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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