BOSCH LBB1938 Power Amplifier Price in Bangladesh - Olefins BD

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BOSCH LBB1938 Power Amplifier

133,000৳ 

The Bosch LBB 1938/20 is a powerful 480 W power amplifier in a 3U high 19”case for rack mounting or tabletop use.

LEDs on the front panel of the LBB1938/20 show the status of the amplifier: power, audio output level, and supervised functions.

This high performance unit fulfills a wide range of public address requirements at a surprisingly low cost.

There are 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.

Rack mounting brackets supplied.

  • 480 watts
  • Very high audio performance power amp
  • Can be used to boost Plena Voice alarm systems with system monitoring
  • XLR and jack input with XLR and Jack loop through outputs
  • 100 volt line input. Ideal for remote location booster amps
  • 100v, 70v and 8 ohm outputs
  • 24v override relay output
  • Temperature controlled fan
  • AC and 24VDC operation
  • LED VU Meter
  • Dual inputs with priority switching
  • Temperature controlled forced front to back
  • Mains, battery back-up, and pilot tone supervision
  • TÜV certified according to IEC 60849

BOSCH LBB1938 Power Amplifier Spces:

  • Voltage: 230VAC, ±10%, 50/60 Hz
  • Inrush current :19 A
  • Max power consumption: 2200 VA
  • Battery power supply
  • Voltage: 24 VDC, +20% / -10%
  • Current max: 30 A

Performance

  • Output power (rms/maximum): 480 W / 720 W
  • Power reduction on backup power: -1 dB
  • Mains power supply
  • 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

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)
-3 dB: 26 A (625 W)
-6 dB: 18 A (430 W)

Pilot tone*: 3.8 A (91 W)

Idle: 0.7 A (17 W)
* 20 kHz -20dB with maximum loudspeaker load

Mechanical
Dimensions (H x W x D): 145 x 430 x 370 mm / (19″ wide, 3U high, with feet)
Weight: Approx. 25 kg
Mounting: Standalone, 19”rack
Color: Charcoal

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