Sub 4 unlocks the full power of Sonos sound to immerse you deeper in every scene and song. Pair it with a Sonos soundbar or speaker for bass you can truly feel. Dual force-cancelling woofers deliver thunderous low end with virtually no distortion, all housed in an iconic design updated with a matte finish. Setup takes minutes — just plug in the power and connect via the Sonos app. Thanks to wireless connectivity, you can place Sub 4 anywhere in the room — even under a sofa. For true cinematic depth, pair two Sub 4s with Arc Ultra or Arc.
| Amplifiers | Dual Class-D digital amplifiers |
| Woofers | Dual 5" x 8" elliptical woofers, force-cancelling configuration |
| Architecture | Ported cabinet for enhanced bass |
| Frequency Response | Down to 25 Hz |
| EQ | Auto-adjusted; further control via Sonos app (bass, treble, loudness) |
| Trueplay | Room-tuning software available on compatible devices |
| Dimensions (H × W × D) | 389 × 402 × 158 mm |
| Colours | Black, White |
| Finish | Matte |
| Join Button | For adding Sub 4 to your Sonos system during setup |
| WiFi | 802.11a/b/g/n/ac/ax, 2.4 and 5 GHz compatible |
| Ethernet | 10/100 Mbps port for wired connection |
| Voltage | 100–240V, 50/60Hz internal power supply |
| Processor | Quad Core (4xA55 1.9GHz) |
| Memory | 512MB DDR4, 4GB eMMC |
| Operating Temperature | 0°C to 40°C |
| Included Cable | Power Cable (2 m) |
| Requirements | Sonos app, internet connection, compatible Sonos speaker (e.g. Arc Ultra, Era 300) |