Bosch Appliances LBB 1938/20 manual Certifications and approvals, Parts included

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2 LBB 1938/20 Plena Power Amplifier

Controls and indicators

Front

Meter (LED's for -20, -6, 0 dB and Power ON)

Battery operation indicator

Overheat indicator

Air inlet for forced air cooling

Back

Level control input 1

Level control input 2

Power button

Mains switch

Interconnections

Back

Priority line input 1 (XLR/balanced)

Line loop-through 1 (XLR/balanced)

Program line input 2 (XLR/balanced)

Line loop-through 2 (XLR/balanced)

Priority controlled loudspeaker output terminals

24 VDC power supply terminal

Three loudspeaker direct output terminals

Two 100 V slave input terminals

Input 2 enable control terminal

Input 1 priority control terminal

Earth connection screw

Mains socket

Certifications and approvals

Safety

 

acc. to EN 60065

 

 

 

Immunity

 

acc. to EN 501304

 

 

 

Emission

 

acc. to EN 551031

 

 

 

Emergency

 

acc. to EN 5416 / EN 60849

 

 

 

 

 

Region

Certification

 

 

Europe

CE

 

CPD

Poland

CNBOP

 

 

 

Parts included

Quantity Component

1LBB 1938/20 Plena Power Amplifier

1Power cord

1Set of 19" mounting brackets

1Installation and User Instructions

Technical specifications

Electrical

Mains power supply

Voltage

230 VAC, ±10%, 50/60 Hz

 

 

Inrush current

19 A

 

 

Max power consumption

2200 VA

 

 

Battery power supply

Voltage

24 VDC +15% / -15%

 

 

Current max

30 A

 

 

Performance

 

 

 

Output power (rms/maximum)

480 W / 720 W

 

 

Power reduction on backup

-1 dB

power

 

Frequency response

50 Hz to 20 kHz (+1/3 dB @ 10 dB

 

ref. rated output)

Distortion

<1% @ 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)

100V or 70 V internally selectable

 

 

Music (non-priority) only

100V or 70 V internally selectable

 

 

Power consumption

 

 

 

Mains operation

 

 

 

Max power

990 W

 

 

-3dB

715 W

 

 

-6dB

510 W

 

 

Pilot tone*

110 W

 

 

Idle

25 W

 

 

24 VDC operation

 

 

 

Max power

32 A (770 W)

 

 

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Contents Input FunctionsDependability OutputParts included Technical specificationsCertifications and approvals Environmental LBB 1938/20 Plena Power AmplifierMechanical Ordering information

LBB 1938/20 specifications

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