B-52 Act Pro 12M 500-Watt 12″ 2-Way — Bi-Amped Main/Monitor


Designed to be used as a main speaker or sit as a dedicated stage monitor,  the ACTPRO 12M is part of the ACT Pro series made in the USA powered loudspeaker systems that offer the sonic accuracy, power, and reliability demanded by today’s professional performers.



  •  Bi-amp design with discrete output stage for both the woofer and compression drive
  •  4th order electronic X-over and multi-stage custom equalization
  • Proprietary efficient class-G amplificationon LF channel
  • Subsonic filter: 12dB/octave
  • Built-in compressor/limiter
  • 100Hz 18dB/octave low cut switch on full range models
  • Ground lift switch
  • Full thermal & short circuit protection
  • Large heatsink with convection cooling
  • Oversized toroidal transformer
  • LEDs for Power, Protect, Limit and Signal
  • 115V/230V 60Hz/50Hz selector switch


Cabinet features

  •  Made in U.S.A. using advanced CNC routers
  • 5/8” birch plywood construction
  • Main & monitor sitting positions (ACTPRO12M)
  • Reinforced internal bracings
  • Environmentally friendly WarneckeTM
  • scratch resistant black paint finish
  • 16-gauge wrap-around steel grilles
  • Metal handles and rubber feet
  • Rubber strips (ACTPRO12M)
  • Metal pole mounting cup (ACTPRO1515 excluded)
  • Front logo illuminated with blue LED

Loudspeaker components

  • Compression Driver: Celestion 1”-exit with PETP film diaphragm
  •  Conical wave guide (ACTPRO12M)

Low Frequency Transducers

  • Vented magnet assemblies for advanced cooling
  • High temperature copper-wound voice-coil on polyamide former for increased reliability
  • Celestion SP-1200 (ACTPRO12M)


PETP-Film diaphragm compression driver

  • Sophisticated computer modeling was used to optimize the magnetic and acoustic design ofthese ferrite magnet compression drivers to achieve outstanding performance and reliability.
  • A matched wave front phase corrector produces a perfectly coherent sound wave at the horn throat, for a detailed and dynamic mid and high frequency performance.
  • The polyamide-insulated, copper-clad aluminum voice coil is edge-wound on a glass fiber former resulting in lower distortion and superior power to weight ratio.
  • A one-piece, PETP film diaphragm and surround optimizes energy transfer for greater efficiency
  • The unique patented clamping system contributes directly to low distortion performance while improving the lower mid-band response.

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