เครื่องขยายเสียง ยี่ห้อ BOSCH รุ่น LBB1990-00
- Heart of the Plena Voice Alarm System
- EN 54‑16 certified
- Built-in message manager and 240 W amplifier
- Six‑zone outputs
- 6 emergency and 6 business triggers
Key Specifications
| Voltage | 230/115VAC, ±15%, 50/60 Hz |
| Current inrush | 8 A |
| Max power consumption | 600 VA |
| Voltage | 24 VDC, +15% / -15% |
| Current max | 14 A |
| Output power (rms/maximum) | 240 W / 360 W |
| Power reduction on backup power | -1 dB |
| Frequency response | 60 Hz to 18 kHz (+1/-3 dB at -10 dB ref. rated output) |
| Distortion | <1% at rated output power, 1 kHz |
| Bass control | -8/+8 dB at 100 Hz |
| Treble control | -8/+8 dB at 10 kHz |
| Mic/line input | 1 x |
| Connector | XLR, 6.3 mm jack |
| Sensitivity | 1 mV (mic), 1 V (line) |
| Impedance | >1 kohm (mic); >5 kohm (line) |
| S/N (flat at max volume) | >63 dB (mic); >70 dB (line) |
| S/N (flat at min volme/muted) | >75 dB |
| CMRR | >40 dB (50 Hz – 20 kHz) |
| Headroom | >25 dB |
| Speech filter | -3 dB at 315 Hz, high-pass, 6 dB/oct |
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