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 IP55 rating, and enables operation of loudspeakers in changing ambient conditions.
The d&b 30D amplifier is recommended to drive the 27A-SUB. The d&b D20, D80, 10D and D6 can also be used.
Frequency response (-5 dB standard)
40 - 140 Hz
Frequency response (-5 dB 100 Hz mode)
40 - 100 Hz
Max. sound pressure1
Cabinets per amplifier channel
Installation specific flyable cardioid subwoofer
Power handling capacity (RMS/peak 10 ms)
15" driver with neodymium magnet front
12" rear driver with neodymium magnet rear
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"
1 1 m, free field, SPL max peak test signal: pink noise with crest factor 4