Sonos Sub 4 is a premium wireless subwoofer that delivers deep, distortion-minimizing bass down to 25 Hz for a more immersive home theater and music experience. Dual inward-facing woofers create a force-canceling effect that keeps low end powerful yet clean, without buzz or rattle. With WiFi connectivity, dual orientation placement, and Sonos app control, it integrates seamlessly into modern rooms and setups. Pair it with compatible Sonos soundbars and speakers to enhance clarity, improve balance, and make every scene and track hit harder.
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Sonos Sub 4 – Premium Wireless Subwoofer

Sonos Sub 4 is a next-gen premium wireless subwoofer designed to unlock deeper, more cinematic bass in your Sonos system—without the buzz, rattle, or muddy low end that can overwhelm a room. Dual Sonos-engineered drivers and a ported enclosure deliver chest-thumping impact down to 25 Hz, while the force-canceling acoustic design virtually eliminates distortion for clean, confident bass at any volume.

Built for flexible placement, Sub 4 connects over WiFi so you can position it upright or lay it flat to fit under furniture, then fine-tune performance with Trueplay™ room tuning (supported setup required). Pair it with compatible Sonos soundbars and speakers to offload the lowest frequencies, improving clarity and precision across mids and highs—so dialogue sounds crisper, music feels more spacious, and action hits harder.

What It's Good At:

• Delivering deep, powerful low-end bass down to 25 Hz for movies, TV, and music
• Eliminating buzz and rattle with a force-canceling dual-driver design that keeps bass clean
• Improving overall system clarity by handling the lowest frequencies so paired speakers sound sharper
• Flexible placement with dual orientation (upright or flat) plus WiFi connectivity for easy room integration
• Quick, app-guided setup with a dedicated Join button and Sonos app control
• Smarter next-gen performance with updated internal electronics, including a faster processor, more memory, and a WiFi 6 radio

Sonos Sub 4 Full Specifications:

• Product name: Sonos Sub 4
• Type: Premium Wireless Subwoofer
• Amplifiers: Dual Class-D digital amplifiers tuned to the subwoofer’s acoustic architecture
• Woofers: Dual 5" x 8" elliptical woofers (inward-facing) for a force-canceling effect that virtually eliminates distortion
• Acoustic architecture: Ported cabinet to enhance bass response
• Frequency response: As low as 25 Hz
• EQ: Automatic audio equalization with paired Sonos speaker(s); adjustable bass, treble, and loudness in the Sonos app
• Trueplay™: Room-tuning software that measures acoustics and fine-tunes the system
• Dimensions: 15.31 in (H) x 15.83 in (W) x 6.22 in (D) / 389 mm x 402 mm x 158 mm
• Weight: 25.99 lb (11.79 kg)
• Colors: Black, White
• Finish: Matte
• Orientation: Upright or flat
• Join button: Press once to add Sub 4 to your system during setup
• WiFi: Connects to any 802.11 a/b/g/n/ac/ax 2.4/5 GHz broadcast-capable router
• Ethernet: 10/100 port for hardwiring to your router
• Voltage: 100–240V, 50/60Hz internal power supply
• CPU: Quad Core (4x A55, 1.9GHz)
• Memory: 512 MB DDR4; 4GB eMMC
• Operating temperature: 32°F to 104°F (0°C to 40°C)
• Box contents: Sonos Sub 4; Power Cable
• Power cable length: 6 ft (2 m)
• Documentation included: Quickstart Guide; legal/warranty information
• Requirements – WiFi: Internet connection
• Requirements – power source: Nearby electrical outlet
• Requirements – app: Latest generation of the Sonos app on a compatible device
• Requirements – Sonos product: Compatible amplified non-portable product (examples include Arc Ultra or Era 300)
• Compatible products (examples listed): Arc Ultra, Arc, Beam (Gen 2), Beam (Gen 1), Ray, Five, Era 300, Era 100

Sonos Sub 4 Q&A:

What does Sonos Sub 4 add to a Sonos system?

Sub 4 adds deep, powerful low-frequency bass down to 25 Hz, while helping your paired Sonos soundbar or speakers play mids and highs with more clarity and precision.

Does Sub 4 connect over WiFi or Bluetooth?

Sub 4 connects to your Sonos system over WiFi (and can also be hardwired via Ethernet), which makes placement easier and keeps performance stable.

Can I place the Sub 4 under a couch or lay it on its side?

Yes. Sub 4 supports dual orientation, so you can position it upright or lay it flat for more flexible placement in your room.

Will the bass sound boomy or cause annoying vibrations?

Sub 4 uses inward-facing dual woofers and a force-canceling design to virtually eliminate distortion, reducing buzz and rattle while keeping bass tight and controlled.

What Sonos products can Sub 4 pair with?

Sub 4 is designed to pair with compatible amplified non-portable Sonos products, including options like Arc Ultra, Arc, Beam (Gen 1 or Gen 2), Ray, Five, Era 300, and Era 100.

Is Trueplay supported, and what does it do?

Yes. Trueplay measures your room’s acoustics and fine-tunes the sound so bass stays balanced and consistent—even with challenging placement near walls or under furniture.

What’s included in the box?

The box includes the Sonos Sub 4, a power cable, and documentation (Quickstart Guide plus legal/warranty information).

What are the key setup requirements?

You’ll need a WiFi internet connection, a nearby electrical outlet, the latest Sonos app on a compatible device, and a compatible amplified non-portable Sonos product to pair with.