Sonos Sub 4 Premium Wireless Subwoofer

Product Overview

The Sonos Sub 4 wireless subwoofer adds deep, accurate bass to Sonos soundbar systems in commercial AV installations without requiring a subwoofer cable run to the listening position. Designed to pair with the Arc Ultra, Arc, Beam, Ray, and Era 100/300, it extends low-frequency response to 25 Hz using dual force-canceling elliptical woofers in a ported cabinet. For premium wireless subwoofer AV installation, the Sub 4 connects over Wi-Fi and automatically calibrates with the paired speaker via Auto EQ and Trueplay room calibration. It can be oriented upright or on its side, adapting to the space constraints of conference rooms, boardrooms, and commercial meeting spaces.

Product Description

The Sonos Sub 4 wireless subwoofer delivers commercial-grade low-frequency performance without the cable management burden associated with traditional subwoofer integration. Two Class-D digital amplifiers drive a pair of 5-by-8-inch elliptical woofers mounted face-to-face inside the cabinet, a force-canceling configuration that eliminates cabinet vibration and allows placement on furniture, shelving, or the floor without acoustic artifacts.

The ported cabinet architecture supports frequency extension to 25 Hz, providing the low-frequency foundation required for speech intelligibility and cinematic audio in presentation and collaboration environments. Wireless connectivity means the Sub 4 can be positioned anywhere within Wi-Fi range of the network, removing the constraint of locating the subwoofer adjacent to the soundbar or AV rack. Auto EQ automatically adjusts the Sub 4’s output level to balance with the paired Sonos soundbar, reducing manual calibration time during commissioning. Trueplay room calibration further refines the acoustic response based on the specific dimensions and furnishings of the space, a practical advantage in commercial rooms where acoustics vary significantly.

For installations requiring maximum bass output, two Sub 4 units can be paired simultaneously with the Arc Ultra or Arc, a configuration suited to larger boardrooms and auditorium-adjacent spaces. The matte finish and dual orientation support—upright or on its side—give integrators flexibility in placement without compromising aesthetics. As a force-canceling subwoofer for conference room AV systems, the Sub 4 integrates into the Sonos ecosystem and can be managed alongside other zones from the Sonos app or compatible third-party control systems.

Key Features

• Dual Force-Canceling Woofers — Two 5” x 8” elliptical woofers face inward and cancel each other’s vibration, enabling placement on hard surfaces without buzz or rattle.
• Dual Class-D Digital Amplifiers — Each woofer is driven by its own amplifier for independent control and efficient power delivery at low frequencies.
• 25 Hz Frequency Extension — Ported cabinet architecture delivers deep bass response down to 25 Hz for cinematic and full-range audio in commercial spaces.
• Fully Wireless Operation — Connects to the Sonos system over Wi-Fi, eliminating subwoofer cable runs and simplifying installation in finished spaces.
• Auto EQ — Automatically balances the Sub 4’s output level against the paired Sonos soundbar during initial setup, reducing manual calibration.
• Trueplay Room Calibration — Analyzes the acoustic properties of the room and adjusts the Sub 4’s EQ for accurate bass reproduction in the specific installation environment.
• Dual Sub 4 Support — Two Sub 4 units can be paired with the Arc Ultra or Arc for increased bass output in larger rooms.
• Flexible Orientation — Can be positioned upright or on its side to accommodate space constraints in conference rooms, boardrooms, or media rooms.
• Broad Soundbar Compatibility — Works with Arc Ultra, Arc, Beam, Ray, Era 100, and Era 300 for flexible system configurations.
• Matte Finish — Low-profile aesthetic integrates into professional and commercial interiors without drawing visual attention.

Typical Applications

• Boardroom
• Conference room
• Multi-purpose room
• All-hands room
• Training room
• House of worship
• Auditorium
• Commercial meeting space

Technical Specifications

Frequently Asked Questions

Which Sonos soundbars are compatible with the Sub 4?

The Sub 4 pairs with the Sonos Arc Ultra, Arc, Beam, Ray, Era 100, and Era 300. It does not pair directly with the Sonos Amp or any Sonos speaker not listed here. Verify compatibility with your soundbar model before ordering.

Does the Sub 4 require a wired connection to the soundbar?

No. The Sub 4 connects to the Sonos system over Wi-Fi. Once added to the network and paired to a compatible soundbar in the Sonos app, it operates entirely wirelessly. No subwoofer cable is required.

Can two Sub 4 units be used in the same room?

Yes. Two Sub 4 units can be paired simultaneously with the Sonos Arc Ultra or Arc. This dual-sub configuration increases bass output and provides more even low-frequency distribution in larger rooms such as boardrooms or auditoriums.

How does Trueplay calibration work in a commercial installation?

Trueplay uses the microphone on an Apple iOS device to measure how sound reflects off the walls, ceiling, and furnishings in the room. It then adjusts the Sub 4’s EQ accordingly. Calibration takes a few minutes and should be re-run if the room layout changes significantly.

Is the Sub 4 compatible with third-party AV control systems?

The Sub 4 is controlled through the Sonos app or via third-party control system integrations (such as Crestron, Savant, or Control4) that support Sonos. Direct IR or RS-232 control of the Sub 4 independently is not supported; it is managed as part of the paired soundbar system.

What warranty does the Sonos Sub 4 carry?

The Sub 4 carries a Sonos limited warranty. For commercial AV deployments, Creation Networks recommends registering the product through the Sonos Pro portal if applicable, and confirming warranty terms for commercial-use installations. Contact our support team for assistance.