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Sonos Sub 4: Premium Wireless Subwoofer
Sonos Sub 4: Premium Wireless Subwoofer
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Sonos Sub 4: Premium Wireless Subwoofer
Available in black or white.
The Sonos Sub 4 is a high-output wireless subwoofer designed to deliver deep, dynamic bass while offloading low-frequency processing from paired home theatre soundbars or active streaming speakers. Built on an updated hardware platform, the Sub 4 features refreshed internal processing power, expanded memory, upgraded Wi-Fi 6 wireless radios, and an updated matte-finish enclosure that aligns visually with modern Sonos soundbars and ambient speakers.
Acoustic Architecture and Force-Cancelling Engineering
The core acoustic structure of the Sub 4 utilizes dual 5x8-inch elliptical woofers mounted face-to-face inside a precision-engineered ported enclosure. Powered by dual Class-D digital amplifiers, these inward-firing drivers create a natural force-cancelling effect that neutralises mechanical cabinet vibration and eliminates distortion. This enables the subwoofer to reproduce clean low frequencies down to 25 Hz without mechanical buzz, cabinet rattling, or unwanted resonance.
By pairing the Sub 4 with an active home theatre setup, the host soundbar automatically delegates low-frequency playback to the subwoofer. This frees up the mid-range and high-frequency drivers in the main soundbar or satellite speakers, improving clarity, dynamic range, and spatial soundstage separation across movies and music.
System Tuning, Dual-Sub Configurations, and Placement
The Sub 4 integrates with Sonos Trueplay room calibration software, using mobile measurement microphones to measure room boundaries and automatically balance frequency response to suit local room acoustics. Manual bass, treble, and loudness controls remain accessible within the Sonos app interface.
For large open-plan living spaces or dedicated home theatre installations, the system supports dual-subwoofer setups. A pair of Sub 4 units can be bound to flagship soundbars like the Sonos Arc or Arc Ultra, increasing total low-end output, smoothing out acoustic room nodes, and delivering even bass coverage across multiple seating positions. The enclosure supports versatile physical placement, operating either standing upright on its integrated rubber feet or laid flat on its side to tuck beneath low-profile furniture.
Technical Specification Overview
| Feature | Detail |
| Amplifier Architecture | Dual Class-D Digital Amplifiers |
| Driver Configuration | Dual 5x8-inch Inward-Firing Elliptical Woofers |
| Acoustic Design | Force-Cancelling Ported Enclosure |
| Frequency Response | Extends down to 25 Hz |
| Wireless Connectivity | Wi-Fi 6 (802.11a/b/g/n/ac/ax, 2.4 GHz and 5 GHz) |
| Wired Interface | 1 x 10/100 Ethernet Port |
| Internal Hardware Engine | Quad-Core 4xA55 Processor (1.9 GHz), 2 GB SDRAM, 8 GB eMMC |
| Calibration Support | Sonos Trueplay Tuning |
| Physical Dimensions (H x W x D) | 389 mm x 402 mm x 158 mm |
| Net Weight | 11.79 kg |
| Power Consumption | 100-240V, 50/60Hz Internal Supply (Up to 50 percent lower idle draw) |
See manufacturer website for specific product warranty information.
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Warranty
For the best performance and to ensure your new product works perfectly with your existing setup, we strongly recommend having a professional audiovisual technician install and configure your equipment.
Professional installation provides several key benefits:
Optimal Performance: An experienced technician will properly calibrate and fine-tune your new component to achieve the highest possible audio and video quality. They can also ensure seamless integration with your current system.
Trouble-Free Setup: AV equipment can be complex. A professional will handle the setup efficiently and safely, preventing any potential damage to the product or your space.
Peace of Mind: Knowing your equipment is installed correctly gives you confidence that it will function reliably for years to come.
Understanding Product Warranties
Your product is covered by a manufacturer's warranty.
This means that any warranty claims, service requests, or repairs must be handled directly through the manufacturer.
To ensure your warranty remains valid, it is crucial that you follow the manufacturer's warranty guidelines and instructions.
These guidelines often specify requirements for installation, use, and maintenance. Failure to follow them could void your warranty.
You can find the specific warranty information and contact details for your product in the documentation on the manufacturer's website.
It is always a good idea to register your product with the manufacturer after purchase, as this can simplify the process if you ever need to make a warranty claim.
If you have any questions about your new equipment or need a recommendation for a professional installer, please don't hesitate to contact us. We're here to help you get the most out of your purchase.
