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B52 ACTPRO-18S HD 18-Inch Powered Subwoofer

B52 ACTPRO-18S HD 18-Inch Powered Subwoofer
B52 ACTPRO-18S HD 18-Inch Powered Subwoofer

B52 ACTPRO-18S HD 18-Inch Powered Subwoofer

By B52
We apologize, this product is no longer available.
Likely due to either replacement with a newer model or manufacturer discontinuation.
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B52 ACTPRO-18S HD 18-Inch Powered Subwoofer

Featuring a 4" voice coil, an 18" Celestion cast frame woofer produces thunderous low end with defined articulation. A convection cooled, 1000W Class-G amplifier, features a stereo crossover with high pass outputs, clipping protection, thermal limiting, and an integrated BBE Sonic Maximizer. Connect any full range cabinet to the balanced High-Pass outputs and process your entire system through the BBE. Add any ACTPRO-12, ACTPRO-12M, or ACTPRO-15 atop using the 1.5" diameter pole mounting cup and optional 22" mounting pole. Accented in a durable, black HiFiDeco painted finish, the 3/4" birch plywood construction produces tight low end. Detachable 3" casters are included for easy load-ins.


  • 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 low frequency channel
  • Subsonic filter: 12dB/octave
  • Built-in compressor/limiter
  • Balanced XLR input (Left and Right on ACTPRO18S Sub)
  • Balanced XLR full-range output (Left and Right on ACTPRO18S Sub)
  • Left and right balanced XLR high-pass outputs on ACTPR018S Sub
  • 0-1800 Phase switch on ACTPRO18S Sub
  • 100Hz 18dB/octave low cut switch on Full Range models
  • 3rd order electronic crossover on ACTPRO18S
  • Ground lift switch
  • Full thermal and short circuit protection
  • Large heatsink with convection cooling
  • Oversized toroidal transformer
  • LEDs for power, protect, limit and lignal
  • 115V/230V 60Hz/50Hz selector switch
  • Compression Driver
  • Celestion 1" - exit with PETP film diaphragm
  • Constant Directivity Horns
  • 90 x 40 constant directivity horn (ACTPRO15 and ACTPRO1515)
  • 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)
  • Celestion SP-1500 (ACTPRO15 and ACTPRO1515)
  • 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 and 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
  • 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
… [ More ]
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