How to Set Up Your Sonos Sub (Gen 3)

Beginner 10-15 minutes

What You'll Need

  • Sonos Sub (Gen 3)
  • Existing Sonos speaker to pair with (soundbar, Arc, Beam, Five, etc.)
  • Sonos app

Step-by-Step Setup

  1. Position Sub - can stand upright or lay flat; experiment for best bass
  2. Plug in Sub
  3. Open Sonos app
  4. Add to existing speaker:
    • Go to System → select room with compatible speaker
    • Tap "Add Sub"
    • App discovers and pairs Sub
  5. Adjust Sub settings:
    • Sub level (+/-) to taste
    • Phase (0 or 180 degrees) for room acoustics

Key Features

  • Dual force-cancelling drivers
  • Deep bass without vibration
  • Pairs with Sonos soundbars and speakers
  • Adjustable levels and phase
  • Wireless connection to Sonos system
  • Upright or flat placement

Troubleshooting

  • Sub not found: Ensure LED is flashing; restart app
  • Bass too boomy: Move Sub away from corners/walls; adjust level
  • Phase issues: Try 180-degree setting if bass sounds hollow
  • Reset: Hold Connect button while reconnecting power