A head-to-head soundbars comparison to help you pick the right one for your home theater.
Updated June 3, 2026
Verdict
The Sonos Arc is a premium single bar (5.0.2) with a clean look and the excellent Sonos multiroom ecosystem — but you add the Sub and rear speakers separately. The Samsung HW-Q990D is a complete 11.1.4 system that includes wireless rear speakers and a subwoofer in the box for true, enveloping discrete surround. Buy the Sonos Arc for a tidy one-bar setup you may expand later and Sonos whole-home audio; buy the Samsung HW-Q990D for the most immersive out-of-the-box surround.
Arc sold out; now sold as the Arc Ultra, under $2,500
Now sold as the Arc Ultra: Check Price| Sonos Arc | Samsung HW-Q990D | |
|---|---|---|
| Configuration | 5.0.2 single bar | 11.1.4 bar + rears + sub |
| Rears included | No (add Sonos rears) | Yes, wireless |
| Subwoofer included | No (add Sonos Sub) | Yes, wireless |
| Dolby Atmos | Yes | Yes |
| Ecosystem | Sonos multiroom, AirPlay 2 | Samsung Q-Symphony, SmartThings |
| Setup | One bar, very simple | Bar + sub + 2 rears |
| Best for | Clean look, Sonos homes | Maximum immersion out of box |
| Price | Bar only, no longer sold new; Arc Ultra under $2,500 | Under $2,500 (full system) |
The table above compares the Sonos Arc and the Samsung HW-Q990D on configuration, included rears and subwoofer, Atmos support, ecosystem and price, and the difference that actually decides it is what arrives in the box: a 5.0.2 bar alone (the Arc Ultra that replaced it lists at under $2,500) against a complete 11.1.4 system with wireless rears and sub at under $2,500.
In a figure like 5.0.2 the first number counts ear-level channels, the second counts subwoofers and the third counts height channels, which is why the Arc reads 5.0.2 with no subwoofer of its own and the Q990D reads 11.1.4.
You want a single, beautifully simple bar, you already use (or want) Sonos multiroom audio, and you prefer to add a sub and rears later.
Now sold as the Arc Ultra: the original Sonos Arc is no longer sold new on Amazon. Sonos has replaced it with the Arc Ultra, still a single Dolby Atmos soundbar that you can add a Sonos sub and rears to later, at under $2,500. The buttons for the Arc on this page go to the Arc Ultra.
Check the Arc Ultra (now sold in its place) on Amazon
You want full discrete surround sound with rear speakers and a subwoofer included, and the most immersive Atmos experience without buying add-ons.
Check Samsung HW-Q990D on Amazon
No. The Arc is a single 5.0.2 bar. For full surround you add the Sonos Sub and a pair of rear speakers (such as Era 100s) separately, which raises the total cost well above the bar alone. The Samsung HW-Q990D includes a wireless sub and rears in the box.
For pure out-of-the-box surround immersion, yes — the Q990D is a complete 11.1.4 system with rears and a sub, so it envelops you without add-ons. The Sonos Arc wins on simplicity, build, and ecosystem if you want one tidy bar and value Sonos multiroom audio.
Yes. The Arc is designed to expand — add a Sonos Sub and a pair of Sonos rears over time to build toward a fuller surround setup. This staged approach is a key reason to choose the Arc if budget is spread out.
The Sonos Arc has a slight edge for casual music thanks to its tuning and the Sonos app/multiroom ecosystem with services built in. The Q990D is primarily a home-theater surround system, though it also plays music well, especially with its included subwoofer for low end.