B-Line 21″
The Powerhouse
The mighty 21″ driver with its huge 5″ voice coil thunders with up to 142 dB max. SPL down to the deepest depths – performing from 25 Hz it is the bass beast in our line-up.
With a load capacity of up to 4,000 W peak, it delivers enough power for every stage and every event. Despite its higher weight, it is easy to manoeuvre thanks to the two wellpositioned recessed grips on both sides.
In direct comparison, as expected, it delivers the most robust performance at the low end and generates more than enough pressure in any situation.
The active versions of this bass monster have a 1,600 W Class-D amp on board.
Features
The great advantage of powered speakers is the built in amplifier. So there is no need for an external device – the internal amp is optimally matched to the woofer! The B 21A is driven by a mighty 1,600 W
(peak) Class-D amplifier. Integrated DSP presets allow loading of preset system setups that are optimally matched to SE AUDIOTECHNIK products.
Thus, the entire system is quickly and easily set up and perfectly adjusted. The directivity can be effortlessly changed in a flash from normal to cardioid or end-fire configuration via the large display and the push/rotary controller.
Parameters such as EQ, Delay, Sensitivity and Phase can be adjusted and stored in your own User Presets.
Products of the 21'' - Series
Previous slide
Next slide
Accessories
B21 TC
Transport Cover for B 21 subwoofer
B21 TD
Dolly-Board for B 21 subwoofer
Specifications
Downloads
EU Declaration of Conformity – Passive Loudspeakers
Downloadfile 
File Size 300 kB
Version v202108
Downloads 4735
EU Declaration of Conformity – Self-Powered Loudspeakers
Downloadfile
File Size 328 kB
Version v1.0
Downloads 3991
EU Declaration of Conformity – Rigging and Accessories
Downloadfile
File Size 111 kB
Version v202312
Downloads 8576