Bose FreeSpace 3 Series I Acoustimass module

Bose FreeSpace 3 Series I Acoustimass module
Bose FreeSpace 3 Series I Acoustimass module

The Bose® FreeSpace 3 Series I Acoustimass bass module is designed to provide surface-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" (133mm) woofer that delivers deep, non-localized bass down to 40 Hz without audible distortion. For surface-mount applications
  • Acoustimass speaker technology filters out audible distortion to deliver non-localized bass
  • Designed to work with the FreeSpace 3 surface and flush 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
  • Selectable 70/100V or low impedance

Frequency Response (+/-3 dB)

50 Hz - 230 Hz

Frequency Range (-10 dB)

40 Hz - 315 Hz

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)

Maximum SPL @ 1 m

Per channel: 96 dB SPL (102 dB SPL peak)
Mono: 102 dB SPL (108 dB SPL peak)

Nominal Impedance

5 Ω mono direct (transformer bypassed)

Transformer Taps (70/100 V)

25 W, 50 W, 100 W, 200 W


14.0" H x 7.5" W x 13.5" D (356 mm x 191 mm x 342 mm)
Width, bracket attached: 8.8" (222 mm)

Net Weight

17.5 lb (7.9 kg) - with bracket

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Magna-Tech Electronic Co., Inc.
329 Palermo Ave. 1st Floor
Coral Gables, FL 33134-6601 USA
Phone: (305) 573-7339
Fax: (305) 573-8101
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