Definitive Technology Mythos 3C-85 vs Devialet Dione Opera
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Choosing between the Definitive Technology Mythos 3C-85 and Devialet Dione Opera? Both compete in the Soundbar segment. Here’s how they compare across the specs that matter most for your home theater.
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Looking at overall performance dimensions: The Definitive Technology Mythos 3C-85 scores higher in value. The Devialet Dione Opera leads in form factor, room fit. They score similarly in ease of use.
These soundbars differ in channel configurations of 3.0 vs 5.1.2, and only the Devialet Dione Opera includes Dolby Atmos support. Atmos adds a height dimension to surround sound, placing sounds above you. It's object-based, so the receiver decides which speakers reproduce each sound based on your layout.
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 Devialet Dione Opera is the stronger choice — it leads in 2 of 4 scored dimensions. The Definitive Technology Mythos 3C-85 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 | 3.0 | 5.1.2 |
| Total Power (RMS) | — | 950W |
| Driver Count | 13 | 17 |
| Freq Response Low | 100Hz | 24Hz |
| Freq Response High | 25000Hz | 21000Hz |
| Passive | Yes | No |
| Dolby Atmos | No | Yes |
| Dolby Digital+ | No | Yes |
| Dolby TrueHD | No | No |
| DTS:X | No | No |
| DTS Virtual:X | No | No |
| DTS-HD Master | No | No |
| Built-in Sub | No | Yes |
| Wireless Sub Included | No | No |
| Wireless Sub Support | No | Yes |
| Wireless Surround Support | No | Yes |
| HDMI eARC | No | Yes |
| HDMI Inputs | 0 | 1 |
| HDMI Version | — | 2.1 |
| Optical Input | No | Yes |
| Analog Stereo In | No | No |
| Sub Pre-Out | No | No |
| Ethernet | No | Yes |
| Bluetooth | No | Yes |
| BT Version | — | 5.0 |
| Wi-Fi | No | Yes |
| Wi-Fi Standard | — | Wi-Fi 5 |
| AirPlay 2 | No | Yes |
| Chromecast | No | Yes |
| Spotify Connect | No | Yes |
| Voice Assistants | ||
| Room Calibration | — | Room Calibration |
| Dialog Enhancement | No | Yes |
| Night Mode | No | Yes |
| App Control | — | Devialet |
| Wall Mountable | Yes | Yes |
Key Differences
- Freq Response Low: Definitive Technology Mythos 3C-85 at 100Hz vs Devialet Dione Opera at 24Hz. Determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support.
- Channel Config: Definitive Technology Mythos 3C-85 at 3.0 vs Devialet Dione Opera at 5.1.2
- Driver Count: Definitive Technology Mythos 3C-85 at 13 vs Devialet Dione Opera at 17
- Freq Response High: Definitive Technology Mythos 3C-85 at 25000Hz vs Devialet Dione Opera at 21000Hz
- Total Power (RMS): Definitive Technology Mythos 3C-85 at — vs Devialet Dione Opera at 950W
Which Should You Choose?
Choose Devialet Dione Opera if you want:
- + better freq response low — determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support
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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