Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - HW-Q990D | Sony - Bravia Theater Quad |
|---|---|---|
| Total power | 656 W | 504 W |
| Subwoofer included | true | false |
Between the HW-Q990D and Bravia Theater Quad, the HW-Q990D comes out ahead in total power / subwoofer included, while the Bravia Theater Quad wins on several specs. Overall, the HW-Q990D scores 88.6 and the Bravia Theater Quad scores 76.4 on our Mars Score.
Which should you buy?
The HW-Q990D is the clear pick on raw spec strength, leading by 12.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the HW-Q990D if you care most about total power / subwoofer included. The biggest gaps in its favor are total power, subwoofer included. The single most decisive one: Total power — 30.16% more. 656 W vs 504 W.
The Bravia Theater Quad similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable dolby atmos, earc, so those specs do not separate the two — focus on the differences below.
Bottom line: the HW-Q990D is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Samsung - HW-Q990D or Sony - Bravia Theater Quad?
Samsung - HW-Q990D leads the current Mars Score by 12.2 points.The more useful decision is the trade-off behind that result: compare total power, subwoofer included against the way you will actually use the product.
Choose Samsung - HW-Q990D if…
Samsung - HW-Q990D has the measurable edge on total w, subwoofer included.
Choose Sony - Bravia Theater Quad if…
Sony - Bravia Theater Quad does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Samsung - HW-Q990D wins
- ▲Total power — 30.16% more. 656 W vs 504 W.
- ▲Has Subwoofer included.
Why Sony - Bravia Theater Quad wins
- No decisive advantages.
Spec comparison
Audio
| Spec | Samsung - HW-Q990D | Sony - Bravia Theater Quad |
|---|---|---|
| Channels | 11.1.4 | 4.0.4 |
| Total power | 656 Wlead | 504 W |
| Dolby Atmosⓘ | true | true |
| DTS:X | true | true |
Connectivity
| Spec | Samsung - HW-Q990D | Sony - Bravia Theater Quad |
|---|---|---|
| HDMI inputs | 2lead | 1 |
| eARCⓘ | true | true |
| Subwoofer included | truelead | false |