Sonos SUBG3US1BLK Subwoofer Review
Our verdict
The Sonos Sub Gen 3 is the easiest wireless subwoofer to set up if you already own Sonos speakers, pairing over Wi-Fi with zero audio lag and no cables to route across the room. The $649 price is a real commitment, but 1,900 buyers and a 4.7-star rating confirm the experience lives up to expectations for most people.
Check price on AmazonBest for
Existing Sonos households wanting deep, cable-free bass that integrates seamlessly with Sonos soundbars and speakers
Skip if
You do not own other Sonos gear, or you want a sub that connects to any amplifier without a dedicated ecosystem
- Power 245 W
- Speaker type Subwoofer
- Driver size 15.8"
- Connectivity Wi-Fi
- Mounting Floor Standing
- Color Black
- Priced 91% above the category median ($339.87 across 73 tracked models)
- Power of 245 W - lower than 63% of the 74 models we track
- Weight of 15467.0 lb - heavier than 100% of the 74 models we track
Pros
- Wi-Fi pairing eliminates cable runs across the room
- Force-canceling dual driver design reduces unwanted cabinet vibration
- Trueplay auto-calibration adjusts bass to the room
- 4.7-star average from 1,900 buyers, one of the strongest ratings in this category
- Compact floor-standing footprint at 15.3 x 6.2 x 15.8 inches
Cons
- Works only with Sonos products, not standard AV receivers or amplifiers
- At $649 it is one of the most expensive consumer subwoofers in its size class
- No wired LFE or RCA input for non-Sonos setups
Our scorecard
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Owner rating4.7/5
4.7 average across 1,900 owner ratings
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Popularity4.9/5
1,900 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other AV receivers and amplifiers, soundbars, home theater speakers, subwoofers, surround sound systems and Blu-ray players we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The Sonos Sub Gen 3 uses two force-canceling drivers mounted face to face inside a slot-ported plastic cabinet. The opposing driver arrangement eliminates vibration that would otherwise rattle shelves or transmit through floors, which is a meaningful engineering choice for anyone who has struggled with a buzzy floor-standing sub. The 245W amplifier is class-D, meaning it runs cool and efficiently.
Connectivity is Wi-Fi only. The sub pairs with Sonos soundbars, the Sonos Arc, Sonos Beam, or any Sonos speaker used as a stereo pair through the Sonos app. Setup takes a few minutes via the app, including an automatic room calibration called Trueplay that adjusts the sub's output to account for room acoustics. There is no RCA or LFE input, which means the sub is not usable outside the Sonos ecosystem.
With 1,900 ratings and a 4.7-star average this is one of the most validated subwoofers in its price tier. At $649 it costs roughly twice what a comparable wired 12-inch sub costs, but buyers consistently report that the wireless convenience and calibration quality justify the premium for a Sonos-based living room setup.
Specifications
| Power | 245 W |
|---|---|
| Speaker type | Subwoofer |
| Driver size | 15.8" |
| Connectivity | Wi-Fi |
| Mounting | Floor Standing |
| Color | Black |
| Dimensions | 15.3 X 6.2 X 15.8 In |
| Weight | 15467.0 lb |
Performance notes
The 245W amplifier combined with two opposed drivers inside a tuned cabinet produces bass that Sonos describes as reaching into the deepest register of music and film soundtracks. The slot-port design is tuned at the factory and is not adjustable by the user, which removes flexibility but also removes the chance of misadjustment. The cabinet measures 15.3 x 6.2 x 15.8 inches, notably slim for a floor-standing sub, and the dual-driver configuration keeps the exterior vibration-free enough to place near furniture without causing rattles.
What buyers say
At 1,900 reviews and 4.7 stars, the Sonos Sub Gen 3 has one of the largest and most positive review bases in the wireless subwoofer segment. Buyers overwhelmingly praise the seamless pairing with Sonos soundbars and the audible improvement in bass depth. The main criticism that appears is the price, not the performance, which suggests the sub delivers what it promises when used in its intended ecosystem.
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Frequently asked questions
Can I use the Sonos Sub with a regular AV receiver?
No. The Sonos Sub connects exclusively over Wi-Fi to other Sonos products. It does not have an RCA, LFE, or speaker-wire input, so it cannot be used as a standalone subwoofer with a traditional receiver or stereo amplifier. If you want a Sonos-style experience without existing Sonos hardware, you would need to build out the Sonos system from scratch.
What Sonos products is the Sub Gen 3 compatible with?
The Sub Gen 3 pairs with Sonos soundbars including the Arc, Beam Gen 2, and Ray, as well as any two Sonos speakers configured as a stereo pair such as the Era 100 or Era 300. The pairing is done through the Sonos app and takes just a few minutes. Older Sonos products that are in legacy mode may have limited compatibility.
How does Trueplay calibration work?
Trueplay is Sonos's automatic room correction feature available on iOS devices. Once the Sub is paired, you walk around the room holding your phone while the sub and connected speakers play test tones. The app analyzes how sound reflects off walls, floors, and furniture and then adjusts the equalization to compensate, resulting in bass that sounds more even throughout the room rather than boomy in one spot and thin in another.