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d&b audiotechnik J-SUB


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Product Overview

The J-SUB is an actively driven 2-way bass-reflex design housing three long excursion neodymium 18" drivers, two drivers face to the front and one driver to the rear. The cardioid dispersion pattern resulting from this approach avoids unwanted energy behind the system that greatly reduces the reverberant field at low frequencies and provides the greatest accuracy of low frequency reproduction. J-SUB cabinets can be used to supplement J8 and J12 loudspeakers in various combinations, ground stacked or flown, either integrated on top of a J8 / J12 array or as a separate column.

The J-SUB can only be driven by the d&b D12 dual channel amplifier configured for the J-SUB. More detailed information on specific loudspeaker setups with the D12 amplifier is available either in the relevant loudspeaker or D12 manual.



The J-SUB cabinet is constructed from marine plywood and has an impact and weather protected PCP (Polyurea Cabinet Protection) finish. The front and rear of the loudspeaker cabinet are protected by a rigid metal grill and the side panels incorporate eight handles. Four 100 mm wheels and one EP5 or NL8 connector are mounted at the rear.


  • System data
  • Frequency response (–5 dB standard)    32 Hz -100 Hz
  • Frequency response (–5 dB INFRA mode)    32 Hz - 70 Hz
  • Max. sound pressure (single cabinet, 1 m, free field)    138 dB
  • Loudspeaker data
  • Nominal impedance front/rear    4/8 ohms
  • Power handling capacity (RMS/peak 10 ms)    
  • Front    800/3200 W
  • Rear    400/1600 W
  • Components    3 x 18” driver
  • Connections    1 x EP5, optional 1 x NL8
                screw terminal block
  • Pin assignments    NL4: 2+/2–
  • EP5    1: F+ /2: F– /3: R+ /4: R– /5: F SenseDrive2
  • NL8    1+: F+/1–: F– /4+: R+ /4–: R–/3–: F SenseDrive2
  • Weight    106 kg (234 lb)

Product Downloads

  • J-SUB J-Series Brochure PDF 8.5 MB
  • J-SUB Mobile Sound Products Brochure PDF 4.8 MB
  • J-SUB User Manual v2.1 PDF 1.3 MB
  • J-SUB J-Series Rigging Manual v1.3 PDF 4.5 MB


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*Prices are in AUD, include GST and are subject to change. Please call National Audio for pricing and availability on the J-SUB.