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B-52 ACTPRO1515 850-Watt Dual 15″ 2-Way —Bi-Amped Active System

  • Features rugged birch plywood construction, durable, black Warnecke® paint finish and 16-gauge wrap-around steel grilles.
  • Custom Celestion loudspeakers and compression drivers are used in all full-range models.
  • Designed to withstand abuse of the road.


At a Glance


The new ACTPRO Series is an advanced line of made in the USA powered loudspeaker systems that offer the sonic accuracy, power and reliability demanded by today’s professional performers. Fuelled by B-52’s ultra-efficient Class-G amplifiers, ACTPRO systems deliver rich, clear sound at extreme SPLs. 




• Bi-amp design with discrete output stage for
both the woofer and compression driver
• 4th order electronic X-over and multi-stage
custom equalization
• Proprietary efficient class-G amplification on LF channel
• Subsonic filter: 12dB/octave
• Built-in compressor/limiter
• Balanced XLR input 
• Balanced XLR full-range output
• 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
• Reinforced internal bracings
• Environmentally friendly WarneckeTM
scratch resistant black paint finish
• 16-gauge wrap-around steel grilles
• Metal handles and rubber feet
• Front logo illuminated with blue LED


Loudspeaker components

• Celestion 1”-exit with PETP film diaphragm
Constant Directivity Horns
• 90 x 40 constant directivity horn
Low Frequency Transducers
• Vented magnet assemblies for advanced cooling
• High temperature copper-wound voice-coil on polyamide former
for increased reliability
• Celestion SP-1500 (ACTPRO15 &


PETP-Film diaphragm compression driver
• Sophisticated computer modeling was used to optimize the magnetic and acoustic design of

these 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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