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Bosch LBB 1938 User Manual

Bosch LBB 1938
22 pages
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Plena Booster Amplifier
Installation and Operating Manual
LBB 1930, LBB 1935,
LBB 1938
en
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Bosch LBB 1938 Specifications

General IconGeneral
Mains Voltage100 - 240 V AC, 50/60 Hz
S/N (flat at max. volume)>80 dB
Operating Temperature+45°C (32°F to 113°F)
Storage Temperature-20°C to +70°C (-4°F to 158°F)
Signal-to-Noise Ratio>80 dB
Output Impedance8 Ohm
Power Supply100 - 240 V AC, 50/60 Hz

Summary

Important Safeguards

About This Manual

Safety Precautions

About the Equipment

Controls and Indicators (Front)

Details the front panel controls and indicators for LBB1930/1935 and LBB1938 models.

Rear Controls and Connections (LBB1930/1935)

Explains rear panel controls and connections for LBB1930 and LBB1935 booster amplifiers.

Rear Controls and Connections (LBB1938)

Details rear panel controls and connections specific to the LBB1938 booster amplifier.

Internal Settings (LBB1938 Only)

Rack Installation

External Settings and Connections

Connect DC Supply (Battery)

Instructions for connecting a 24 Vdc backup power supply or batteries.

Line Input and Loopthrough Connections

Guide to connecting line inputs and using loopthrough features for signal routing.

Priority Input and Control Terminals (LBB1938)

Details on using priority inputs and control terminals on the LBB1938 model.

100 V Slave Input

Explanation of how to connect to an existing 100 V loudspeaker line as a slave input.

Constant Voltage Loudspeaker Connection

Guidance on connecting 100 V and 70 V constant voltage loudspeakers.

Low Impedance Loudspeaker Connection

Instructions for connecting 8 Ohm loudspeakers in series/parallel arrangements.

Mains Connection

Instructions for connecting the booster amplifier to the mains power supply.

Booster Amplifier Operation

Technical Data

Electrical Specifications

Details on mains voltage, power consumption, and battery specifications.

Performance Characteristics

Information on frequency response, distortion, and signal-to-noise ratio.

Input Specifications

Details on sensitivity, impedance, and CMRR for various input types.

Output Specifications

Data on line loopthrough and loudspeaker output power and impedance.

Environmental Conditions

Operating and storage temperature ranges, and relative humidity limits.

General Specifications

Information on EMC, fan noise, dimensions, weight, and mounting brackets.

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