BC332 - Cardioid subwoofer

  • Double-tuned, bass-reflex loaded cardioid-control subwoofer system
  • Single 18” woofer with 15” woofer in cardioid arrangement
  • Large vents for improved breathing and low port compression
  • Selectable cardioid patterns with up to 42dB rearward rejection
  • SIS pre-wired for very high damping and further reduced distortion (with ALC)
  • Low impedance for efficient amplifier loading

Product description

The BC332 is a self-contained, high-output cardioid subwoofer system for both permanent and portable ground-stacked applications. It is designed to offer a high output, tight and accurate sub-bass response, for low-frequency extension of any Alcons pro-ribbon system.

By means of a front and rear located woofer configuration, in combination with dedicated processing, the system offers selectable cardioid low-frequency pattern control and excellent rear rejection (up to 42dB), without the need for additional cabinets.

On the front side, one 18” long-excursion woofer with 4-in. voice-coil with double-spider and demodulation ring frame, is mounted in a front-loaded configuration, with X-Venting™; This port takes more than 20% of the baffle surface and is designed to maximise the system’s breathing capacity, increasing overall output while minimising port-compression.

On the rear side, a single 15” long-excursion woofer with 4-in. voice-coil with double-spider and demodulation ring frame, is mounted in a “front”-loaded configuration, with Flank-Venting™ port; This folded port design enables optimal reflex-breathing, under minimal baffle dimensions.

The combination of complex internal panel lay-out and extensive bracing brings a rigid structure with a high enclosure stiffness from a relatively low-weight package. It is finished in Durotect™ scratch-resistant coating and is fitted with 6 handles for easy logistics + stand mount adapter (road-version).

The BC332 is powered and controlled by the ALC amplified loudspeaker controller; Through the integrated processor, the ALC offers BC332-specific drive processing with response optimisation, dedicated power and excursion protection, and hybrid filtering.

The preset library contains cardioid settings for maximum rear-/side-ward attenuation. The 4 ohms impedance offers efficient amplifier loading.

Through the SIS™ (Signal Integrity Sensing) circuit, the cable-length and connector resistance between the BC332 and ALC is completely compensated (system damping factor >10.000), for further increased accuracy and controlled cone-travel, resulting in a tighter sub and bass response.

Dimensional drawing

Technical specifications

Frequency response  
+/- 3 dB   36 Hz - 150 Hz
+/- 10 dB   30 Hz -
   Sensitivity nominal   98 dB (40 - 100 Hz)
Nominal impedance   4 ohms/front, 4 ohms/rear
Recommended drive   Sentinel3 min., 1 pce. per 2 ch.
    (4 ohms/front, 4 ohms/rear)
Nominal SPL peak   134dB (Sentinel10 40 - 100 Hz)
    139dB (comparative)
Dispersion H x V   omni (rear not connected) /

Physical specifications

System subwoofer, bass reflex
  front + rear
Drivers LF   1x AW18.4/4 18”,
    X-Vented™ (front)
    1x AW15.4/4 15”,
    Flank-Vented™ (rear)
Connectors   1x Speakon NL8 input
Physical dimensions   mm         inches
Height   727        28.6
Width   596          23.5
Depth   976          38.4
Weight (approx.) BC332   86,2 kg      (190 lb)
Weight (approx.)
  76,5 kg      (169 lb)
Warranty   6 years limited

Stay Tuned

Subscribe to the Alcons newsletter and stay tuned