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Compact 2 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.

MB24 for indoor applications only / MB24 WR for indoor and outdoor applications.


-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

-2 x 12″ (305 mm) high-excursion woofers with 4″ (102 mm) voice-coils and 800 W long-term power rating provide 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


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)
94 dB SPL

Maximum SPL @ 1 m
123 dB SPL (129 dB SPL peak)


Long-Term Power Handling
800 W (3200 W peak)


Nominal Impedance
4 Ω

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