D&B Audiotechnik Z1613.100 21S-SUB 21-Inch Passive Subwoofer - Weather-Resistant

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D&B Audiotechnik Z1613.100 21S-SUB 21-Inch Passive Subwoofer - Weather-Resistant

The 21S-SUB is a high performance subwoofer for use with the xS-Series and xA-Series loudspeakers and is intended for a wide range of permanently installed applications. The cabinet houses a single long excursion 21" driver in a bass-reflex design. The large, specially shaped reflex port enables the 21S-SUB to achieve high Sound Pressure Levels from a cabinet with a small footprint. When operated in INFRA mode, the 21S-SUB can be used to complement other d&b subwoofers by extending the frequency response of the system down to 33Hz. The 21S-SUB can be ground stacked or flown in either orientation. It can be flown individually or in a cluster of two cabinets. The enclosure is constructed from marine plywood with an impact resistant black paint finish. The front of the loudspeaker cabinet is protected by a rigid metal grill backed by an acoustically transparent foam. The top, bottom and rear panels each incorporate a pair of M10 threaded inserts for attaching d&b rigging hardware. The Weather Resistant (WR) option provides an IP55 rating that enables the operation of loudspeakers in changing ambient conditions, and features a fixed cable.

WR cabinets are equipped with a recessed connector panel including a Faston type connector (2 x 6.3 mm, female). A cover plate which accepts single or dual PG cable glands (Type PG13.5 for cable diameters from 6 - 12 mm) is enclosed, as shown in the graphic opposite.


  • Components: 2 x 12"/1.4"
  • Dispersion: 110° x 45°
  • SPLmax: 137 dB
  • Weight: 33 kg / 73 lb


  • System data:
    • Frequency response (-5 dB standard): 35Hz – 105Hz
    • Frequency response (-5 dB INFRA mode): 33Hz – 85Hz
  • Max. sound pressure:
    • D20/30D amplifier: 134dB
    • D80 amplifier: 135dB
    • Cabinets per amplifier channel: 1
  • Loudspeaker data:
    • Configuration: Installation-specific high-performance subwoofer with a compact footprint
    • Nominal impedance: 4 ohm
    • Power handling capacity (RMS/peak 10ms): 650/2600W
    • Components: 21″ driver with neodymium magnet
    • Connections: Faston connector type 2
  • Dimensions / Weight (H x W x D) (Approx.):
    • Height: 43-5/16″
    • Width: 22-13/16″
    • Depth: 20-11/16″
    • Weight: 119 lb. / 54 kg


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