Capable of producing extremely high sound pressure levels in spite of its size, BX181A combines with any loudspeaker system, no matter what brand, model or kind, to implement sound performances which are hard to believe. Suitable for both indoor and outdoor use, concert halls, theatres, clubs, medium sized venues.


  • BX181A is equipped with a power amplifier (MosFet, class AB) designed around an innovative driver stage that guarantees the lowest possible distortion, while providing excellent dynamic and tonal performance. It delivers a total output power of 1200 watts.
  • D.E.Co (Dynamic EQ. Controller): sophisticated speaker protection circuit.
  • Internal stereo electronic cross-over that may be bypassed for wide-band use.
  • 132 dB max SPL.
  • BX181A is equipped with a 18" woofer - custom designed to Montarbo specifications - featuring neodymium alloy magnet and light-alloy die-cast frame, which ensure significant weight reduction.
  • The cabinet is built with birch multiply and painted with black, heavy duty, antscratch paint; it is fitted with side handles and adaptor for satellyte supporting pole SM4 (optional accessory).
  • The front side is protected by a strong, powder coated, metal grille.


  • Suitable for both indoor and outdoor use
  • Stadiums
  • Arenas
  • Concert halls
  • Theatres
  • Medium to large clubs
  • Large-scale events


Acoustic Data
Frequency Response [-3dB]32 Hz – 100 Hz
SPL 1W @ 1mt101 dB
Max SPL132 dB
Dispersion (HxV)omni
LF Voice Coil4” neodymium
LF Typebass reflex
Amp ClassAB MosFet
Peak Power1000 Watt
RMS Power700 Watt
Self-rotating displayNo
AD/DA ConverterNo
System PresetsNo
Dual Active Peak, RMS, ThermalYes
Input Section
Signal inputDual XLR stereo input
Signal OutDual Line and X-Over
USB ConnectorNo
Pole mountYes
Width540 mm
Height650 mm
Depth600 mm
Weight45 Kg