The Bose Professional FS3 SUB is a compact Acoustimass bass module designed to extend the low-frequency response of the FreeSpace 3 loudspeaker system. Equipped with dual 5.25-inch woofers, it delivers deep, impactful bass while maintaining a discreet form factor that integrates easily into commercial spaces. Optimized to work with FreeSpace 3 satellites, the FS3 SUB is an excellent choice for background/foreground music in retail, restaurants, offices, and hospitality environments.
Key Features
- Passive subwoofer (requires external amplifier)
- Dual 5.25″ (133 mm) woofers in Acoustimass enclosure
- Frequency response: 40 Hz – 200 Hz (–10 dB)
- Power handling: 200 W continuous / 800 W peak
- Maximum SPL: ~106 dB continuous, 112 dB peak
- Can power up to 4 FreeSpace 3 satellite speakers per subwoofer
- Compact enclosure for easy concealment in installations
- Available in black or white finishes
Specifications
- Frequency Range (–10 dB): 40 Hz – 200 Hz
- Coverage Pattern: Omnidirectional (subwoofer)
- Power Handling: 200 W continuous / 800 W peak
- Nominal Impedance: 6 ohms (with satellites connected)
- Connections: Euroblock connector or direct wiring terminals
- Enclosure: MDF/composite with Acoustimass design
- Color: Black


















