Key Features

  • Powerful bass-reflex T-lined design
  • Mobile and fixed installation
  • Pole mount socket
  • Passive/Active & Dante
  • Integrated rigging

Equipped with one powerful specific 21’’ B&C neodymium driver with 4,5’’ voice coil powered by a built in Powersoft amplifier with DSP on board. The amplifier is able to deliver about 270Vpeak/4ohms which represents a short term headroom of about 6dB spl higher than than any other compact shape sub on the market.

AUDIOFOCUS state-of-the-art T-ligned + reflex design subwoofer delivering exceptional sensitivity reaching 142dB max SPL at 35 Hz and 145dB SPL at 50Hz.

Its compact size and integrated rigging makes it extremely well suited for flown coupled configurations. For easy wiring, the S21 provides additional connectors on the front grill for cardioid and end fire setup.

Perfect companion for ARES12 line array and FR-X series

Logo PowersoftLogo Dante

Type Vented T-ligned - Passive/Active
Nominal Impedance Passive: 8Ω
Power handling RMS / Peak Passive: 1500W RMS / 3000W Peak
Active: 3500W RMS / 11550W Peak*
Frequency range @-3dBspl Passive: 40 Hz - 500Hz
Active: 30 Hz - 100 Hz (extended preset)
Sensitivity spl 2πsr 102 dB
SPL@ Peak power Passive: 135,7 dB
Active: 142 dB / 145 dB
Components 21" LF B&C Custom made, 4,5" Voice coil
Line Connectors Active: Balanced 1 x IN, 1 x OUT Neutrik© XLR
Front connection for Cardio Active: powerCON and XLR IN OUT
Passive: speakON 4 or speakON 8 IN OUT
HP Connectors Passive: 2x Neutrik© speakON linked
Construction Birch marine Plywood 15 & 24 mm
Finish High resistant Polyurea coating
Dimensions (h x w x d) 590 x 750 x 655 mm
23,22’’ x 29,52’’ x 25,78’’
Weight Passive: 58 kg / 128 lb
Active: 60 kg / 132 lb
Mounting accessoiries M20 screw & 35 mm compatible flange

* (215V peak/4ohms) / 18225W short term: 270V peak/4ohms

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