Technical Data; System Pre-Amplifier Lbb 1925; Electrical; Performance - Bosch LBB 1925 Installation And Operating Manual

Plena System Pre-amplifier | Installation and Operating Manual |
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Technical data

9. 1 System pre-amplifier LBB 1925

9.1.1 Electrical

Mains voltage
Max mains power consumption
Battery voltage
Max battery current

9.1.2 Performance

Frequency response
Distortion
Call channel
Bass control
Treble control
BGM channel
Bass control
Treble control
Channel separation at 1kHz
Priority mute

9.1.3 Inputs

Call station inputs (8-pin DIN, balanced, for LBB1941/00 and/or LBB1946/00)
Sensitivity
Data
Mic/Line input (3-pin XLR/5-pin DIN, balanced)
Sensitivity
Impedance
S/N (flat at max volume)
S/N (flat at min volume/muted)
CMRR
Headroom
Speech filter
Phantom power supply
BGM input (Cinch, unbalanced, stereo converted to mono)
Sensitivity
Impedance
S/N (flat at max volume)
S/N (flat at min volume/muted)
Headroom
PC input (Cinch, unbalanced, stereo converted to mono)
Sensitivity
Impedance
S/N
Bosch Security Systems | 2003-09 | 3922 988 99483en
Technical data
230 V/115 Vac, (15%, 50/60 Hz)
50 VA
24 Vdc, +20%/-10%
1 A
50 Hz - 20 kHz (+1/-3 dB)
<0.5%
-6/+6 dB at 160 Hz
0/+12 dB at 5 kHz
0/+20 dB at 100 Hz
0/+18 dB at 15 kHz
>65 dB
>50 dB
1 V
RS485, 1200, N, 8, 1, 0
1 mV (microphone), 200 mV (line)
>1 kOhm (microphone), >5 kOhm (line)
>63 dB (microphone), >70 dB (line)
>75 dB
>40 dB (50 Hz - 20 kHz)
>25 dB
-3 dB at 315 Hz, high-pass, 6 dB/oct
16 V via 1.2 kOhm, in microphone mode only
500 mV (CD), 200 mV (aux, tape)
22 kOhm
>70 dB
>75 dB
>25 dB
1 V
22 kOhm
>70 dB
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