Bosch LBB 1920 - Technical Data; Electrical Specifications; Performance Characteristics; Input Specifications

Bosch Security Systems | 2003-09 | 3922 988 99482en
Plena Universal Pre-amplifier | Installation and Operating Manual | en | 17
6 Technical data
6.1 Electrical
Mains voltage 230/115 Vac, ±15 %, 50/60 Hz
Max mains power consumption 25 VA
Battery voltage 24 Vdc, +20 %/-10 %
Max battery current 1A
6.2 Performance
Frequency response 50 Hz - 20 kHz (+1/-3 dB)
Distortion <0.5 %
Bass control ±10 dB at 100 Hz
Treble control ±10 dB at 10 kHz
Line separation at 1 kHz >70 dB
Priority mute >40 dB
6.3 Inputs
Mic/Line inputs 1-4 (3-pin XLR/5-pin DIN, balanced)
Sensitivity 1 mV (microphone), 200 mV (line)
Impedance >1 kOhm (microphone), >5 kOhm (line)
S/N (flat at max volume) >63 dB (microphone), >70 dB (line)
S/N (flat at min volume/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
Phantom power supply 16 V via 1.2 kOhm, in microphone mode only
Line inputs 1-4 (Cinch, unbalanced, stereo converted to mono)
Sensitivity 200 mV
Impedance 22 kOhm
S/N (flat at max volume) >70 dB
S/N (flat at min volume/muted) >75 dB
Headroom >25 dB
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