Sonos Sub (Gen 3) Wireless Subwoofer – Black

Sonos Sub (Gen 3) – The Wireless Subwoofer That Completes a Sonos System, Black

The Sonos Sub (Gen 3), in black, is the wireless subwoofer for the Sonos ecosystem. Two force-cancelling drivers face each other inside the sculpted cabinet, producing deep, detailed bass while cancelling the cabinet vibration that makes lesser subwoofers buzz against the floor. It pairs with Sonos soundbars for home theatre or with Sonos speakers for music, joining the system over Wi-Fi with a single button press.

Trueplay tuning then measures the room and blends the Sub with whatever it is paired to, so the low end arrives integrated rather than attached. Note that the Sub (Gen 3) is being succeeded by the newer Sub 4; this generation remains fully supported and is the value route into genuine Sonos bass while stock lasts.

Key features

• Wireless subwoofer for Sonos systems, black finish
• Two force-cancelling drivers for vibration-free bass
• Pairs with Arc, Beam, Ray and Sonos speakers
• Trueplay room tuning blends it with the paired system
• Wi-Fi connection – no cable to the soundbar
• Stands upright or lies flat, including under furniture
• Sonos app control for level and settings
• Iconic sculpted design with gloss finish
• Generation 3 model – fully supported in the Sonos app

Force-cancelling, explained

When a single large driver pushes air forward, physics pushes the cabinet backward with equal enthusiasm; on a hard floor that becomes rattle and buzz that colours the sound. The Sub’s opposed drivers move in mirror image, so their reaction forces cancel inside the cabinet. What reaches the room is the bass itself – deeper, cleaner and usable at higher levels – and the cabinet can sit against furniture or lie flat under a sofa without announcing itself mechanically.

The single biggest Sonos upgrade

Owners consistently find the Sub transforms a Sonos setup more than any other addition. Soundtracks gain the physical dimension their mixes assume, music systems gain the foundation octave, and – counterintuitively – dialogue often clears up, because the soundbar is relieved of the low frequencies it was straining to fake. Integration through Trueplay keeps the upgrade seamless rather than boomy.

Who the Sub (Gen 3) suits

Choose the Sub (Gen 3) if your Sonos theatre or music system feels thin on films or bass-led music. The black finish disappears beside AV furniture. If you are starting a new system today, compare the Sub 4; if you own Gen 3-era components or find this generation at its current value, it remains the classic Sonos sub.

Placement options

The Sub (Gen 3) is unusually flexible about where it lives: upright beside the media unit as a piece of sculpture, flat on its side, or slid beneath a sofa where its clearance allows. Because the drivers are force-cancelling, the flat positions do not cost performance or create buzz against the floor. Keep a little air around the cabinet, let Trueplay measure the final position, and the Sub disappears into the room in every sense but the audible one.