The Bose Professional FS3II SUBB is a compact Acoustimass bass module designed as part of the FreeSpace 3 Series II system, finished in black. Housing dual 5.25-inch woofers, it extends low-frequency response for background/foreground music applications while maintaining a discreet footprint. Optimized to work with FreeSpace 3 satellite loudspeakers, the FS3II SUBB provides deep bass reinforcement for restaurants, retail, offices, and hospitality spaces.
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 drive up to 4 FreeSpace 3 satellite speakers per sub
- Compact enclosure design for discreet installation
- Black finish with matching grille
- Surface-mount or hidden installation options
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: White


















