 
                                
                            Box Speakers
The BS-250AB-EB is a wall mount box speaker specially designed for voice alarm applications in buildings and installations where an A/B wiring is required. The speaker is certified according to the European Standard EN 54-24: 2008, and compliant with the British Standard BS 5839-8: 2008 14-8.
| BS-250AB-EB | BS-678BSB | BS-678BSW | |
|---|---|---|---|
| Frequency response | 150 Hz - 20 kHz | 150 Hz - 18 kHz | 150 Hz - 18 kHz | 
| Sensitivity (1 W, 1 m) | 91 dB | 94 dB | 94 dB | 
| Max. SPL (1 m) | 101 dB | 98 dB | 98 dB | 
| Rated input (100 V) | 6 W | 6 W | 6 W | 
| Tappings (100 V) | 100 V: 2 x 1.67 kΩ (6 W) / 3.33 kΩ (3 W) / 6.67 kΩ (1.5 W) | 100 V line: 1.7 kΩ (6 W) / 3.3 kΩ (3 W) / 6.7 kΩ (1.5 W) / 13 kΩ (0.8 W) 70 V line: 1.7 kΩ (3 W) / 3.3 kΩ (1.5 W) / 6.7 kΩ (0.8 W) / 13 kΩ (0.4 W) | 100 V line: 1.7 kΩ (6 W) / 3.3 kΩ (3 W) / 6.7 kΩ (1.5 W) / 13 kΩ (0.8 W) 70 V line: 1.7 kΩ (3 W) / 3.3 kΩ (1.5 W) / 6.7 kΩ (0.8 W) / 13 kΩ (0.4 W) | 
| Speaker component | 2 x 10 cm full range dual cone (A/B 2-lines) | 15 cm cone type | 15 cm cone type | 
| Operating temperature | - 10 °C to + 55 °C | -10 °C to +50 °C ( 14 °F to 122 °F) | -10 °C to +50 °C ( 14 °F to 122 °F) | 
| Finish | ABS resin, Steel, traffic white (RAL 9016 or equivalent) | HIPS resin, black (RAL 9011 or equivalent) | HIPS resin, off-white (RAL 9010 or equivalent) | 
| Dimensions | 254.5 x 204.5 x 87.5 mm (W x H x D) | 250 x 190 x 110 mm (W x H x D) | 250 x 190 x 110 mm (W x H x D) | 
| Weight | 1.75 kg | 1.7 kg | 1.7 kg | 
| Dust / Water protection. | IP 32 |