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Product Description

B-52 ACT Pro 15 (B52 ACTPRO 15)


B-52 ACT-PRO 15

15" 2 Way Powered Speaker
500 Watt RMS Bi-Amped
(1000 Watt Program Power / 2000 Watt IP Power)

Contains: B-52 SP-1500 and COMP-4CLB

Configuration 15" 2-Way full-range powered loudspeaker - 500W RMS
Low Frequency SP-1500 - 15" speaker with 2.5" voice coil
High Frequency COMP-4-CLB - PETP film compression driver with 1.75" voice coil
LF Magnet Weight 42 oz
LF Magnet Structure Weight 7 lbs.
Frequency Range 47 Hz -20 kHz
Frequency Response 56 Hz -18 kHz
High Frequency Dispersion 90º x 40º
Maximum peak SPL 131 dB
Output Power LF: 400W Class G
HF: 100W Class AB+B
Input Impedance 20 kOhm Balanced
10 kOhm Unbalanced
Elctronic Crossover 4th order
Low Cut Filer (switchable) 3rd order Butterworth @ 100 Hz
Controls Level knob
Low-cut filter switch
Ground lift switch
Power switch
AC fuse
115/230V switch
Indicators Power
Cooling Convection
Amplifier Protection Short circuit
Overheat mute
SOA output stage
Driver DC protection
Subsonic filter
Turn-on mute and soft ramp
Turn-on inrush current limiting
Power Consumption @ 115V Vac
(1/8 power pink noise) 150VA
Connectors Balanced female XLR input
Balanced male XLR link output

Input Sensitivity ** 775mV (0dBu)
Enclosure Black Warnex® painted birch plywood
Hardware Metal handles
Rubber feet
Pole mounting cup

Grille Powder coated 16 gauge steel
Dimensions 27" H x 17.5" W x 19" D
(686mm x 445mm x 483mm)
Weight 62 lbs. / 28.2 kg

• 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 (Left and Right on ACTPRO118S Sub)
• Balanced XLR full-range output (Left and Right on ACTPRO18S Sub)
• Left and Right balanced XLR high-pass outputs on ACTPRO18S Sub
• 0-1800 Phase switch on ACTPRO18S Sub
• 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

• 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 polyimide-insulated, copper-clad aluminum voice coil is edge-wound on a glass fiber former resulting in a 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 a low distortion performance while improving the lower mid-band response.

• Compression Driver:
o Celestion 1”-exit with PETP film diaphragm
• Horns:
o 900 x 400 constant directivity horn (ACTPRO15 & ACTPRO1515)
o Conical wave guide (ACTPRO12M)
• LF Transducers :
o Vented magnet assemblies for advanced cooling
o High temperature copper voice coil wound on polyamide former for increased reliability
o Celestion SP-1200 (ACTPRO12M)
o Celestion SP-1500 (ACTPRO15 & ACTPRO1515)
o Proprietary SP-1804 cast frame subwoofer (ACTPRO18S)

• Made in U.S.A. using advanced CNC routers
• 5/8” birch plywood construction (ACTPRO12M, ACTPRO15, ACTPRO1515)
• 3/4” birch plywood construction (ACTPRO18S)
• 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


In accordance with California's Prop 65 Compliance Law, Regulation Requires us to Inform California Customers of the Following Warnings for All Products:

*Warning:* This product can expose you to chemicals including wood dust, which is known in the state of California to cause cancer or birth defects or other reproductive harm. For more information, please go to

*Warning:* This product can expose you to chemicals including Di-isodecyl phthalate, which is known in the state of California to cause cancer or birth defects or other reproductive harm. For more information, please go to

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