FreeSpace® 3 Series II Acoustimass® module

FreeSpace® 3 Series II Acoustimass® module
FreeSpace® 3 Series II Acoustimass® module

The Bose® FreeSpace 3 Series II Acoustimass® bass module is designed to provide flush-mount bass augmentation for new and existing background music systems. It features one 5.25" (133 mm) woofer that delivers deep bass down to 40 Hz without audible distortion.

  • Low-frequency loudspeaker featuring one 5.25" (133 mm) woofer that delivers deep, non-localized bass support down to 40 Hz without audible distortion. For flush, ceiling, pendant and wall-mount applications
  • Acoustimass speaker technology filters out audible distortion to deliver non-localized bass
  • Designed to work with the FreeSpace 3 flush and surface satellite speakers, or existing systems where additional bass reinforcement is desired
  • Module design allows parallel connection of multiple bass modules and can accommodate two or four FreeSpace 3 satellites per bass module
  • Plenum rated for use in air handling spaces (with optional plenum cover)
  • Selectable 70/100V or low impedance with transformer tap adjustment under speaker grille

Frequency Response (+/-3 dB)

50 Hz - 230 kHz

Frequency Range (-10 dB)

40 Hz - 315 kHz

Nominal Dispersion

Omni-directional below 200 Hz

Recommended High-Pass Filter

40 Hz high-pass filter


EQ Recommended

Overload Protection


Long-Term Power Handling

70/100 V: 200 W (800 W peak) mono
Low impedance: 50 W (200 W peak) per channel stereo or 100 W (400 W peak) mono

Sensitivity (SPL / 1 W @ 1 m)

Per channel: 76 dB SPL (Mono: 79 dB SPL)


Outer flange diameter: 15.4" (391 mm)
Depth: 7.5" (190 mm)
Ceiling hole diameter: 14.3" (362 mm)

Net Weight

14 lb (6.4 kg)

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Magna-Tech Electronic Co., Inc.
6114 NW 74th Ave.
Miami FL 33166 USA
Phone: (305) 573-7339
Fax: (305) 573-8101
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