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The Bose Professional FreeSpace 3 Series II Bass Module is a professional subwoofer or bass module for installed sound systems. Its job is to reproduce the low-frequency energy that gives music depth, weight, and physical impact. Main loudspeakers are often optimized for voices and musical detail; adding the FreeSpace 3 Series II Bass Module allows those loudspeakers to work more comfortably while the subwoofer handles the deepest part of the program. For a non-technical reader, this means bass notes sound fuller and a system can feel more complete without forcing every visible loudspeaker to be large.
The published frequency performance is 40 Hz – 315 Hz. The listed maximum sound-pressure level is Per channel: 96 dB continuous, 102 dB peak / Mono: 102 dB continuous, 108 dB peak, which helps an audio designer estimate how much bass output is available for the room. Low-frequency sound behaves differently from higher-frequency sound: it spreads broadly, interacts strongly with walls and corners, and can build up unevenly in some locations. Because of this, placement and signal processing are as important as the subwoofer's raw output rating.
The FreeSpace 3 Series II Bass Module needs a compatible amplifier channel and appropriate filtering so only the intended bass frequencies are sent to it. The manufacturer lists 70/100 V: 200 W mono / Low impedance: 50 W per channel stereo or 100 W mono for power handling or output planning. Its enclosure is listed at 15.4 in × 7.4 in (391 mm ×189 mm), loudspeaker diameter × depth / 14.3 in (362 mm), ceiling hole diameter, with a net weight of 14.0 lb (6.4 kg). Only use it in environments allowed by the official environmental specifications. Correct commissioning protects the driver, balances the bass with the main loudspeakers, and prevents an impressive demo setting from becoming tiring during normal operation.
Choose the FreeSpace 3 Series II Bass Module when the sound system needs stronger bass than the main loudspeakers can provide on their own. It is particularly useful for music-focused hospitality, entertainment, retail experiences, multipurpose rooms, and presentations with media playback. It is not automatically necessary for every voice-only system, and more bass is not always better; the goal is controlled, even low-frequency support that suits the audience and the program. A designer should confirm the required quantity, placement, crossover frequency, amplifier headroom, and structural installation method for the real room.
| Colors | Black, white |
|---|---|
| Enclosure Material | PC/ABS |
| Environmental | Indoor only |
| Grille | Expanded metal |
| Suspension/Mounting | (4) mounting arms, (3) suspension/safety cable attachment points |
| Product Dimensions (H×W×D) | 15.4 in × 7.4 in (391 mm ×189 mm), loudspeaker diameter × depth / 14.3 in (362 mm), ceiling hole diameter |
| Net Weight | 14.0 lb (6.4 kg) |
| Shipping Weight | 20.0 lb (9.1 kg) |
| Frequency Range (-10 dB) | 40 Hz – 315 Hz |
|---|---|
| Coverage, Horizontal | Omnidirectional below 200 Hz |
| Calculated Maximum SPL @ 1 m | Per channel: 96 dB continuous, 102 dB peak / Mono: 102 dB continuous, 108 dB peak |
| Nominal Impedance | 6 Ω mono direct (transformer bypassed) |
| Power Handling, long-term continuous | 70/100 V: 200 W mono / Low impedance: 50 W per channel stereo or 100 W mono |
| Power Handling, Peak | 70/100 V: 800 W peak mono / Low impedance: 200 W peak per channel stereo or 400 W peak mono |
| Recommended Signal Processing | Recommended |
| Sensitivity (SPL/1 W at 1 m) | Per channel: 76 dB / Mono: 79 dB |
| Transformer Taps, 100V | 25 W, 50 W, 100 W, 200 W |
| Transformer Taps, 70V | 25 W, 50 W, 100 W, 200 W |
| Coverage, Vertical | Omnidirectional below 200 Hz |
| Driver Protection | Recommended high-pass filter 40 Hz high-pass filter |
|---|---|
| Low-Frequency | 5.25 in (133 mm) dual-voice-coil low-frequency driver |