Bosch Plena Power Amplifier LB1935 - Page 2

2 | LBB 1930/20 Plena Power Amplifier
Back
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Level control input 1
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Level control input 2
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Power button
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Mains switch
Interconnections
Back
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Priority line input 1 (XLR/balanced)
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Line loop-through 1 (XLR/balanced)
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Program line input 2 (XLR/balanced)
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Line loop-through 2 (XLR/balanced)
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Priority controlled loudspeaker output terminals
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24 VDC power supply terminal
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Three loudspeaker direct output terminals
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Two 100 V slave input terminals
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Input 2 enable control terminal
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Input 1 priority control terminal
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Earth connection screw
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Mains socket
Certifications and Approvals
Region Certification
Europe CE
TUV certificate IEC60849
Poland CNBOP
Safety acc. to EN 60065
Immunity acc. to EN 55103-2
Emission acc. to EN 55103-1
Emergency acc. to EN 54‑16 / EN 60849
Parts Included
Quantity Component
1 LBB 1930/20 Plena Power Amplifier
1 Power cord
1 Set of 19" mounting brackets
1 Installation and User Instructions
1 Cable with XLR connector
Technical Specifications
Electrical
Mains power supply
Voltage 230 VAC ±10%, 50/60 Hz
Inrush current 8 A
Max power consumption 400 VA
Battery power supply
Voltage 24 VDC +15% / -15%
Mains power supply
Current max 6 A
Performance
Output power (rms/maximum) 120 / 180 W
Power reduction on backup
power
-1 dB
Frequency response 50 Hz to 20 kHz (+1 / -3 dB at -10 dB
ref. rated output)
Distortion <1% at rated output power, 1 kHz
S/N (flat at max volume) >90 dB
Line inputs 2 x
Connector 3-pin XLR, balanced
Sensitivity 1 V
Impedance 20 kohm
CMRR >25 dB (50 Hz to 20 kHz)
Gain 40 dB
100 V input
Connector Screw, unbalanced
Sensitivity 100 V
Impedance 330 kohm
Line loop-through output 2 x
Connector 3-pin XLR
Nominal level 1 V
Impedance Direct connection to line input
Loudspeaker outputs 3 x
Connector Screw, floating
Direct output 100 V, 70 V, 8 ohm
Priority only (from input 1) 100 V or 70 V internally selectable
Music (non-priority) only 100 V or 70 V internally selectable
Power consumption
Mains operation
Max power 274 W
-3dB 193 W
-6dB 143 W
Pilot tone* 41 W
Idle 18 W
24 VDC operation
Max power 7.0 A (168 W)
-3 dB 6.0 A (144 W)
-6 dB 4.3 A (103 W)
Pilot tone* 0.9 A (22 W )
Idle 0.1 A (2.4 W)
* 20 kHz -20dB with maximum loudspeaker load