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d&b audiotechnik 27A-SUB


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Product Overview

27A subwoofer

The 27A-SUB is a compact high performance cardioid subwoofer powered by a single amplifier channel and is for use with the xS-Series and xA-Series loudspeakers. The cabinet houses two long excursion neodymium drivers in an integrated cardioid setup: a 15“ driver in a bass-reflex design facing to the front and a 12” driver in a two chamber bandpass design radiating to the rear. The 27A-SUB can be used stand-alone, stacked or as a base for a mixed ground stack. It can also be combined with 10A and 10AL loudspeakers in vertical flown arrays. The enclosure is constructed from marine plywood with an impact resistant black paint finish and is Ball Impact Resistant according to DIN 18032-3 for schools and sports halls. The front of the loudspeaker cabinet is protected by a rigid metal grill backed by an acoustically transparent foam. The side panels have an integrated rigging system and the rear panel incorporates two NL4 connectors as well as a two pole screw terminal block. The loudspeaker cabinets and most accessories are also available with the Special Colour (SC) option that can be executed in all RAL colours, whilst the Weather Resistant (WR) option provides an IP34 rating, and enables operation of loudspeakers in changing ambient conditions.



The d&b audiotechnik loudspeaker range is designed exclusively for operation with d&b amplifiers.

These provide power as well as comprehensive control and protection functions tailored to achieve the performance, reliability and longevity associated with the d&b System approach. The d&b 30D amplifier is recommended to drive the 27A-SUB. The d&b 10D, D20, D80, D6 and D12 amplifiers can also be used with the appropriate loudspeaker configuration selected.



System data

  • Frequency response (–5 dB standard): 40 - 140 Hz
  • Frequency response (-5 dB 100 Hz mode): 40 - 100 Hz
  • Max. sound pressure (1m, free field) [1]
    with D6/10D: 128 dB
    with D12/D20/30D: 131 dB
    with D80: 131 dB
  • Cabinets per amplifier channel: 2


Loudspeaker data

  • Configuration: Installation specific flyable cardioid subwoofer
  • Nominal impedance: 6 Ω
  • Power handling capacity (RMS/peak 10 ms): 500/2000 W
  • Components:
    15" driver with neodymium magnet front
    12" rear driver with neodymium magnet rear
  • Connections:
    2 x NL4
    screw terminal block


Dimensions, weight

  • Dimensions (H x W x D): 488 x 580 x 700 mm / 19.2 x 22.8 x 27.6"
  • Weight: 41 kg / 90 lb


[1] SPL max peak test signal: pink noise with crest factor 4

Product Downloads

  • 27A-SUB User Manual v1.2 PDF 0.3 MB
  • 27A-SUB xA-Series Rigging Manual v1.1 PDF 1.8 MB
  • 27A-SUB xA-Series Brochure PDF 4.8 MB
  • 27A-SUB Installation Sound Products Brochure PDF 7.1 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 27A-SUB.