21S subwoofer
21S subwoofer
Subwoofers
Installation specific high performance subwoofer with compact footprint
- Components 21"
- Dispersion Omni directional
- max SPL 135 dB
- Weight 54 kg / 119 lb
Product description
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 option enables the operation of loudspeakers in changing ambient conditions, and features a fixed cable. The 21S-SUB can also be supplied in any RAL colour. This Special Colour option can be provided for rigging accessories.
Amplifiers
The d&b 30D amplifier is recommended to drive the 21S-SUB. The d&b D20 and D80 can also be used.
Architectural specifications for detailed project planning
Do you require architectural specifications? For a d&b system or a specific d&b Series? Here are the most important technical specifications ready for download.
with D20/30D
with D80
135 dB
1 x screw terminal block
43.3 x 22.8 x 20.7"
119 lb
1 SPL max peak test signal: pink noise with crest factor 4
Application information is presented for guidance only. d&b reserves the right to make any necessary changes to the products and the published specifications. As part of the ongoing development program d&b tries to maintain the highest degree of product compatibility.