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d&b audiotechnik Ci7-SUB


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Product Overview

The Ci7-SUB is the installation version of the C7-SUB. It is acoustically compatible with the standard road version differing only in cabinet construction and mounting hardware. The Ci7-SUB is a bass-reflex subwoofer that employs a large, specially shaped reflex port enabling the Ci7-SUB to achieve high sound pressure levels with minimal power compression and breathing effects.

The Ci7-SUB can be driven either by the d&b D6 or D12 dual channel power amplifiers configured for the C7-SUB. More detailed information on specific loudspeaker setups with d&b amplifiers is available either in the relevant loudspeaker or amplifier manuals.



The Ci7-SUB cabinet is constructed from marine plywood with an impact resistant paint finish. The front of the loudspeaker cabinet is protected by a rigid metal grill, covered with acoustically transparent foam. Four M16 threaded inserts are provided for attaching installation hardware. The cabinet rear panel is fitted with a single NL4 connector. The loudspeaker cabinet is also available in Special Colour (SC) and Weather Resistant (WR) options.


  • System data
  • Frequency response (–5 dB)    44 Hz –140 / 100 Hz
  • Max. sound pressure (single cabinet, 1 m, free field)    40 Hz - 100 Hz
  • with D6    135 dB
  • with D12    131 dB
  • P1200A    133 dB
  • Input level (100 dB SPL / 1 m)    –13 dBu
  • Loudspeaker data
  • Nominal impedance    8 ohms
  • Power handling capacity (RMS/peak 10 ms)    400 / 1200 W
  • Connections    1 x NL4
                optional fixed cable (H-07-RN-F 2 x 2.5 qmm/AWG 13)
  • Pin assignments    NL4: 2+/2–
              Fixed cable: Brown + / Blue –
  • Weight    45 kg (99 lb)

Product Downloads

  • Ci7-SUB C-Series Brochure PDF 3.2 MB
  • Ci7-SUB User Manual v2.1 PDF 0.1 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 Ci7-SUB.