B-Line
B 21A
Technical details
| Model Name | B 21A |
|---|---|
| Type | 21" Active Subwoofer |
| ACOUSTICAL DATA | |
| Frequency range (-3 dB)* | 33 Hz – 230 Hz |
| Frequency range (-6 dB)* | |
| Frequency range (-10 dB)* | 27 Hz – 280 Hz |
| Coverage angles (-6 dB) [H x V] | Omnidirectional |
| Maximum Peak SPL** | 139 dB |
| System type | 1-way self-powered system |
| Crossover frequency | – |
| Transducers | 1 × 21" driver (5" voice coil) |
| Enclosure type | Vented box |
| AMPLIFICATION | |
| Type | Single channel, Class-D with SMPS |
| Output power*** | 1600 W |
| Protection | Short circuit, overheating, overcurrent |
| Connectors | Input signal: balanced XLR 3-pin female; Link output: balanced XLR 3-pin male; Power input: powerCON® 20A; Power link output: powerCON® 20A |
| Wiring | Pin N: Neutral; Pin L: Conductor; Pin E: Ground |
| Input sensitivity | +14 dBu (3.88 V), +4 dBu (1.23 V), 0 dBu (0.775 V), 0 dBV (1 V), -10 dBV (0.316 V) |
| DSP | 48 kHz/24 bit with extended dynamics; Processing latency: 1.1 ms |
| Processing | Factory and user presets, EQ, delay, directivity control, input sensitivity, phase inversion |
| User controls | Power: ON/OFF switch; DSP: display with digital encoder, LCD Backlight control (factory default on) |
| MECHANICAL DATA | |
| Product dimensions [H x W x D] (incl. rigging) | 672 × 585 × 829 mm |
| Product dimensions [H x W x D] (incl. rigging) | 672 × 595 × 832 mm |
| Net weight | 51.5 kg |
| Packaging dimensions [H x W x D] | 796 × 685 × 930 mm |
| Total weight | 59.8 kg |
| Cabinet | 12 – 21 mm plywood |
| Cabinet | 15 – 21 mm plywood |
| Cabinet finishing | Black or white polyurea coating |
| Grille | Powder coated perforated steel |
| Hardware | 8 rubber feet and top recesses for stacking; M20 pole thread; 4 SE Audiotechnik® ergonomic handles |
| Stacking | – |
| Splay angles | – |
| ACCESSORIES | |
| - | Stacking frame for M-F3A PRO |
| - | |
| - | |
| SPS20 | Pole bar |
| B 18 TD | Transport dolly (1 unit) |
| B 21 TD | Transport dolly (1 unit) |
| - | |
| - | |
| B 18 TC | Transport cover |
| B 21 TC | Transport cover |
| B 18 FC | Flight case |
| B 21 FC | Flight case |
| P801DL RC | Amplifier rain cover |
| ANNOTATION | |
| * | Measured with GENERAL preset with 6th-order Butterworth low-pass filter applied at 200 Hz |
| ** | Measured with 12 dB Crest factor Pink Noise, half space |
| *** | Short term rms output power according to CEA2006 |
