Bosch LBB 1938/20 is a powerful 480W power amplifier, in a 3U high 19" case for rack mounting or desktop use. LEDs on the front panel show the status of the amplifier: power, audio output level, and supervised functions. This high-performance unit fulfils a wide range of PA requirements at a surprisingly low cost. Huge power for any commercial PA systems application.
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3 year factory warranty.
The amplifier is protected against overload and short circuits. 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 and activates an LED on the front panel, if the internal temperature reaches a critical limit due to poor ventilation or overload.
The unit operates both on mains power and on a 24 V battery power supply for emergency back up, with automatic switchover.
The system has two balanced inputs with priority control, each with a loop-through facility. This makes it easy to connect remote systems that require priority control. An additional 100 V line input is provided to connect the amplifier to a 100 V loudspeaker line, to provide more power to remote locations.
The amplifier has 70 V and 100 V outputs for constant voltage loudspeaker systems and a low impedance output for 8 ohm loudspeaker loads.
The LBB 1938-20 has two separate priority controlled 100 V outputs for zones that only need announcements made via the priority input, and for zones that will not get any announcements made via the priority input.
|Operating temperature||-10°C to +55°C|
|Mounting||Stand-alone, 19" rack|
|Max Power||990 W|
|Line loop-through output||2|
|Frequency Response||50 Hz to 20 kHz (+1/-3 dB @ -10 dB ref. rated output)|
|Output Power||480 W / 720 W|
|Power Consumption||2200 VA|
|Inrush Current||19 A|
|Voltage||230 VAC ±10%, 50/60 Hz|
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