480 Watt Power Amplifier Bosch View larger

480 Watt Power Amplifier Bosch

LBB 1938/20

New product

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. 

More details

Please enter your suburb and postcode

Shipping Rates

More info

3 year factory warranty.

  • 480 W power amplifier in a 3U high 19"housing
  • 70 V / 100 V and 8 ohm outputs
  • Dual inputs with priority switching
  • 100 V input for slave operation on 100 V speaker line
  • Temperature controlled forced front to back ventilation, directly stackable
  • Mains, battery back-up, and pilot tone supervision
  • EN 54-16 and EN 60849 compliant


Dependability

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.

Input

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.

Output

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
Weight25Kg
MountingStand-alone, 19" rack
Dimensions145x430x370mm
Max Power990 W
Loudspeaker outputs2
Line loop-through output2
Input100 V
Line Inputs2
Frequency Response50 Hz to 20 kHz (+1/-3 dB @ -10 dB ref. rated output)
Output Power480 W / 720 W
Power Consumption2200 VA
Inrush Current19 A
Voltage230 VAC ±10%, 50/60 Hz

Reviews

No customer reviews for the moment.

Write a review

480 Watt Power Amplifier Bosch

480 Watt Power Amplifier Bosch

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. 

Download