Bose Professional MA12EX - Modular Column Array Loudspeaker

The MA12EX modular column array loudspeaker from Bose Professional is engineered to deliver exceptional speech clarity and consistent audio coverage in acoustically challenging environments. A slim column enclosure is used to support discreet architectural integration while wide 160° horizontal dispersion is achieved for even sound distribution across large seating or standing areas. Clear vocal reproduction is maintained through controlled vertical coverage, allowing reflections from floors and ceilings to be reduced in reverberant spaces.

Extended-range performance is provided to support full-range speech and light music without the immediate need for separate low-frequency reinforcement. Weather-resistant construction is incorporated, allowing reliable operation in outdoor and semi-outdoor installations. Through a modular stacking design, system performance can be adapted to meet varying room sizes and throw distances, making the loudspeaker suitable for both fixed installations and flexible system designs across commercial and public venues.

Key Features 

• Line array driver configuration
  Twelve 2.25-inch full-range drivers are arranged vertically to achieve wide horizontal coverage while maintaining narrow vertical dispersion. Improved intelligibility is supported by keeping sound energy focused on listeners rather than reflective surfaces.
• Modular column design
  Multiple enclosures can be stacked to form a larger line array. Increased vertical pattern control is achieved, allowing longer throw distances and more precise coverage control in tall or deep spaces.
• Articulated Array® technology
  A nominal 160° horizontal and 20° vertical coverage pattern is provided per module. Vertical coverage is adjusted automatically by the number of stacked modules, ensuring scalable performance without complex aiming requirements.
• Extended low-frequency response
  A frequency range extending down to 58 Hz allows speech and light music reinforcement to be handled by the column alone. Compatibility with modular bass loudspeakers is maintained for systems requiring deeper bass and higher output.
• Installation flexibility
  Optional mounting brackets are supported for single, double, or triple module configurations. Simple and secure installation is enabled across a wide variety of wall-mount and array layouts.

Specifications

Compliance
EN 54-24 Certified: No

Physical
Colors:  white
Enclosure material: Extruded-aluminum sidewalls with zinc-plated steel top and bottom endcaps, all powder-coated
Environmental rating: Outdoor use supported
Grille: Aluminum with powder-coated finish
Ingress protection: IPX5
Suspension/mounting: 6 × M6 threaded inserts
Product dimensions (H × W × D): 38.8 in × 4.1 in × 5.5 in (985 mm × 104 mm × 139 mm)
Net weight: 21.0 lb (9.4 kg)

Performance
Frequency range (-10 dB): 58 Hz – 16,000 Hz
Horizontal coverage: 160°
Vertical coverage: 20°
Calculated maximum SPL at 1 m: 112 dB continuous, 118 dB peak
Nominal impedance: 8 Ω
Power handling, long-term continuous: 150 W
Power handling, peak: 600 W
Sensitivity (SPL/1 W at 1 m): 87 dB
Recommended signal processing: Bose Professional loudspeaker EQ
Transformer taps, 70V: CVT-MA12EX transformer available
Transformer taps, 100V: CVT-MA12EX transformer available

Transducers
Low-frequency drivers: 12 × 2.25 in (57 mm) high-excursion, weather-resistant drivers
Driver protection: Overload protection

Mechanical Diagrams
Front view, top view, and right view diagrams are provided for installation reference.

Conclusion

The Bose Professional MA12EX modular column array loudspeaker is positioned as a versatile and intelligibility-focused solution for demanding indoor and outdoor sound reinforcement applications. Through controlled coverage, modular scalability, and weather-resistant construction, consistent and clear audio performance is delivered across a wide range of architectural spaces while maintaining a clean and unobtrusive visual presence.