Sonos Sub Gen 3

Subwoofer Diameter: 15.3 inches
Speaker Size: 15.8 inches
Speaker Maximum Output Power: 245 watts
Connectivity Technology: Wi-Fi

Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A Wi-Fi connected Sonos subwoofer built to slot into an existing Sonos system, best suited to buyers already inside that ecosystem.

As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.

ASIN: B087CCZH4QModel: SUBG3US1Category: Subwoofers

Overview

A black Sonos subwoofer rated at 245 watts, built for floor standing placement and wireless connection into a Sonos Wi-Fi speaker system.

Sonos subwoofers are designed to join a Sonos speaker or soundbar over the same Wi-Fi network rather than a wired RCA connection, which is consistent with the Wi-Fi only connectivity listed here. The 245 watt rating and floor standing mounting point to a unit meant to sit on the floor near a TV or listening area rather than tuck onto a shelf. A couple of the listed figures, including driver size and weight, do not line up cleanly with the product's stated dimensions and are left out here rather than repeated as fact.

Black finish
Floor standing mount
Wi-Fi connectivity
245W rated power

Who it's for

Fits households already running Sonos speakers or a Sonos soundbar and wanting to add low end wirelessly without new cabling. Not a fit for anyone wanting a subwoofer that connects by RCA or line in cable, since this one is Wi-Fi only.

Pros and cons

Pros

Wireless Wi-Fi connection to Sonos system
Floor standing design
245W power rating

Cons

Wi-Fi only, no wired input
Requires an existing Sonos speaker or soundbar to pair with

Performance notes

At 245 watts and built for floor placement, the sub is sized to sit near a TV or seating area and join the rest of a Sonos system over Wi-Fi rather than a cable run. Because it pairs wirelessly, setup runs through the Sonos app rather than a physical hookup to a receiver.

Specifications

Dimensions & fit
Brand	Sonos
Model	SUBG3US1
Subwoofer Diameter	15.3 incheshigher than 100% of 28 subwoofers
Speaker Size	15.8 incheshigher than 95% of 23 subwoofers
Weight	34.1 poundshigher than 69% of 56 subwoofers
Item Dimensions D X W X H	15.3 × 6.2 × 15.8 inches
Capacity & performance
Speaker Maximum Output Power	245 wattslower than 70% of 38 subwoofers
Audio Output Mode	Surround
Age Range Description	Adult
Maximum Range	10 Meters
Power & efficiency
Power Source	Corded Electric
Construction & materials
Enclosure Material	Polycarbonate (PC)
Color	Black
Compatibility & installation
Connectivity Technology	Wi-Fi
Connectivity Protocol	Wi-Fi
Subwoofer Connectivity Technology	Wireless
Mounting Type	Floor Standing
Compatible Devices	Television
Included components
Customer Package Type	Standard Packaging
Unit Count	1
Warranty & support
Warranty Type	Limited
Warranty Description	1 year
Other details
Speaker Type	Subwoofer
Control Type	App
Audio Driver Type	Dynamic Driver
Number Of Audio Channels	3
Is Waterproof	No
Water Resistance Level	Not Water Resistant
Number Of Items	1
Number Of Batteries	1 Lithium Ion batteries required.
Total Ethernet Ports	1
Mp3 Player	No
Additional Features	Radio, Subwoofer
Antenna Location	For Surround Sound Systems
Builtin Media	Power Cable, Sonos Sub - Black
Specific Uses For Product	For Surround Sound Systems, Home Theaters, Music, Streaming Shows, Movies, And Games
Wireless Technology	NFC, Wi-Fi
Series Number	3
Controller Type	android, ios, vera