BOSCH LBD1938/00, 480W, Plena Booster Amplifier

Description

The LBD 193x amplifiers are powerful power amplifier in a 2U high 19”case (3U housing for LBD 1938) for rack mounting or tabletop use. The Bosch Plena power amplifier series with its varied amplification range fulfills a wide variety of public address requirements at a surprisingly low cost.The LBD193x amplifiers feature colorful LED bar on the front side to indicate the acoustic level of the signal in dB

LBD193x amplifiers have 100V input for slave operation of the amplifier, XLR loop in and loop through facility for ease of installation and 100V output as well as 70V output for connecting to the loudspeakers with line matching transformers,8ohm and 4ohm outputs for connecting to the Low impedance speakers.

The output voltage can be selected between 100V and 70V internally.Additionally LBD1938/00 amplifier features a dual XLR inputs with priority switching Gain or level control is located on the rear of the unit to avoid accidental setting change.

The amplifier works on 24VDC power supply during emergency situations A temperature-controlled fan ensures high reliability at high output levels and low acoustic noise at lower output levels. An overheat protection circuit switches off the power stage,if the internal temperature reaches a critical limit due to poor ventilation or overload.

The amplifier has 70V and 100V outputs for constant voltage loudspeaker systems,and a low impedance output for 8 ohm or 4 ohm loudspeaker loads LBD1938 amplifier also has priority controlled 100V outputs which can be used to route audio coming into priority and program inputs to the loudspeaker.

There are Priority input enable and Program input enable pins which are default off and default on respectively,when these enabled by a 24VDC signal then the respective inputs are activated Whenever the priority enable input is supplied with continuous 24VDC signal,the program input is over-rided by the priority input.