The AS-31 is a compact, passive subwoofer for fixed installations. It is the optimum complement to the compact fullrange speakers of the Arc and Linea series. It is characterized by its precise reproduction of bass frequencies, high power rating and attractive design.

Main features

  • 15" long excursion driver
  • 700 W nominal power rating
  • SPL max.: 128 dB
  • Connections: 2 x 4-pin terminal
  • High-quality wooden enclosure (multiplex birch)
  • Available in RAL Classic, NCS or Pantone colors on request
  • Optionally available with weatherproof PU coating
  • Various mounting options
  • In order to ensure performance and operational safety, Fohhn system amplifiers including the correct speaker preset are required.


Fohhn technologies

Technical data

Electroacoustic features

acoustic design
vented design
power rating (nominal)
700 watts
1 × 15" long excursion, Neodym
maximum SPL
128 dB
frequency range
35 Hz – 500 Hz
nominal impedance
8 ohms


multiplex birch plywood
front design
acoustic foam
24 kg
protection grille
steel grille, ball impact resistant, powder-coated
standard colours
textured paint, black
mounting points
6 × M8 thread
2 x 4-pin terminal
dimensions (W × H × D)
430 × 590 × 520 mm

Optional features

optional weather protection
polyurethane coating, water-repellent speaker cone impregnation
optional colours
RAL Classic / NCS / Pantone on request

power rating (nominal/program): according to IEC-60268-5 (long term/short term)
power rating (peak); maximum SPL: peak, 20 ms with bandpass filtered pink noise signal according to IEC 60268-2 at one octave above the lower limit of the frequency range
sensitivity: 2,83 V at 8 ohms (2 V at 4 ohms, 4 V at 16 ohms) at a distance of 1 m under anechoic fullspace conditions
frequency range: -10 dB under anechoic halfspace-conditions
weight: net weight without optional equipment
Intelligent Protection Circuit (IPC): voltage-controlled semiconductor circuit protecting the HF-driver against overload highly effective and with very short attack time
cut-off frequency: -10 dB under anechoic halfspace-conditions with speaker preset
heat dissipation: pink noise, 6 dB crest, 1/4 Pmax

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+49 7022 93323-0

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