BOSCH LBB 1930/20 Power Amplifier 120 Watt
BOSCH LBB 1930/20 Power Amplifier 120 Watt - Image 2

BOSCH LBB 1930/20 Power Amplifier 120 Watt

Power amplifier, 120 W power amplifier in a 2U-high, 19” case for rack mounting or tabletop use.

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Description

The LBB 1930/20 is a powerful 120 W power amplifier in a 2U high 19” case for rack mounting or tabletop use. LEDs on the front panel 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.

Fitur

  • 120 W power amplifier in a compact 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.

 

Spesifikasi

Electrical

Mains power supply
Voltage 230 VAC ±10%, 50/60 Hz
Inrush current 8 A
Max power consumption 400 VA
Battery power supply
Voltage 24 VDC +15% / -15%
Current max 6 A
Performance
Output power (rms/maximum) 120 / 180 W
Power reduction on backup power -1 dB
Frequency response 50 Hz to 20 kHz (+1 / -3 dB at -10 dBref. rated output)
Distortion <1% at 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) 100 V or 70 V internally selectable
Music (non-priority) only 100 V or 70 V internally selectable

 

Power consumption

Mains operation
Max power 274 W
-3dB 193 W
-6dB 143 W
Pilot tone* 41 W
Idle 18 W
24 VDC operation
Max power 7.0 A (168 W)
-3 dB 6.0 A (144 W)
-6 dB 4.3 A (103 W)
Pilot tone* 0.9 A (22 W )
Idle 0.1 A (2.4 W)

* 20 kHz -20dB with maximum loudspeaker load

Mechanical

Dimensions (H x W x D) 100 x 430 x 270 mm (19″ wide, 2U high, with feet)
Weight Approx. 10.5 kg
Mounting Standalone, 19”rack
Color Charcoal

Environmental

Operating temperature -10 ºC to +55 ºC (14 ºF to +131 ºF)
Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
Relative humidity <95%
Acoustic noise level of fan <48 dB SPL at 1 m (max output)

 

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