Bosch LBB 1920/00 - Controls and Indicators; Front Controls and Indicators; Back Panel Connections; Technical Specifications

The master output channel, or one of the input
channels, can be selected to be monitored with
headphone connector and LED meter.
Controls and indicators
Front
• LED power level bar
• Power on indication LED (green)
• Power button
• Four treble control knobs
• Four bass control knobs
• Four channel volume control knobs
• Master volume control knob
• Headphone channel selection knob
Back
• Mains voltage switch
• Insertion/ cascade switch
Interconnections
Front
• Headphone jack
Back
• Four channel inputs, each consisting of:
– One DIN connector (priority)
– One XLR connector
– Two cinch connectors
• Four direct channel outputs
• Tape output
• Earth connection screw
• Emergency relay output
• 24 V DC backup power input
• 24 V DC output
• Insertion / cascade / emergency input
• Insertion / cascade output
• Master line output (XLR)
• Master mic output (priority)
• Mains socket
Certifications and approvals
Safety acc. to EN 60065
Immunity acc. to EN 55103-2
Emission acc. to EN 55103-1
Region Certification
Europe CE
Installation/configuration notes
LBB 1920/00 rear view
Parts included
Quantit
y
Component
1 LBB 1920/00 Plena Universal Pre-amplifier
1 Power cord
1 19”mounting brackets
1 Plena CD
1 Installation and User Instructions
Technical specifications
Electrical
Mains power supply
Voltage 230/115 VAC, ±15%, 50/60 Hz
Inrush current 1.5 A at 230 VAC / 3 A at 115 VAC
Max power consumption 25 VA
Battery power supply
Voltage 24 VDC, +15% / -15%
Current max 1 A
Performance
Frequency response 50 Hz to 20 kHz (+1 / -3 dB)
Distortion <0.5 %
Bass control ±10 dB at 100 Hz
Treble control ±10 dB at 10 kHz
Channel separation >70 dB at 1 kHz
Priority mute >40 dB
Dynamic range 100 dB
Mic/line inputs 4 x
Connectors 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 mic mode only
Line inputs 4 x
2 | LBB 1920/00 Plena Universal Pre-Amplifier