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MB12 modular bass loudspeaker


Compact 1 x 12″ (305 mm) configuration designed to provide bass augmentation for Bose® LT arrays and other subwoofer applications. Allows minimal-height arrays when used with LT mid/high loudspeakers.

MB12 for indoor applications only.


Low-frequency reinforcement for Bose® LT arrays and other subwoofer applications that require 40 – 280 Hz bass response

Front-loaded tapered transmission line design provides peak-free extended low-frequency response, and reduces port turbulence distortion

1 x 12″ (305 mm) high-excursion woofer with 4″ (102 mm) voice-coil and 400 W long-term power rating provides high SPL with fast transient response

Compact enclosure optimized for bass-array applications when cardioid or other directional-bass configurations are required for reverberant spaces


  • Stadiums
  • Arenas
  • Houses of worship
  • Auditoriums
  • Performing arts venues
  • Outdoor event venues


Technical Summary

Frequency Response (+/-3 dB)
40 Hz – 280 Hz

Frequency Range (-10 dB)
36 Hz – 290 Hz

Nominal Dispersion
Omni-directional below 200 Hz

Sensitivity (SPL / 1 W @ 1 m)
91 dB SPL

Maximum SPL @ 1 m
117 dB SPL (123 dB SPL peak)

Long-Term Power Handling
400 W (1600 W peak)

Nominal Impedance
8 Ω

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