LBB 442x/xx Power Amplifiers

LBB 442x/xx Power Amplifiers
  • 1, 2, 4, or 8 audio outputs (selection from 100 / 70 / 50 V outputs)
  • Audio processing and delay for each amplifier channel
  • Amplifier supervision and spare amplifier switching
  • Loudspeaker line and loudspeaker supervision (LBB 4428/00 only line supervision)
  • Eight control inputs and 1, 2, 4 or 8 control outputs
  • Supervision of line attached to control inputs
  • Automatic volume control
  • Two audio inputs (4 audio inputs for LBB 4428/00)
  • Redundant network connection
  • Details
    Mains power supply
    Voltage 100 to 240 VAC ±10%, 50/60 Hz
    Power consumption Pmax -3 dB* / idle** / standby
       LBB 4421/10 404 / 56 / 28 W
       LBB 4422/10 402 / 60 / 28 W
       LBB 4424/10 426 / 83 / 37 W
       LBB 4428/00 433 / 90 / 32 W
    * Alarm tone level** With pilot tone 15 V
    Battery power supply
    Voltage 48 VDC -10% to +20%
    Power consumption Pmax -3 dB* / idle** / standby
       LBB 4421/10 380 / 46 / 20 W
       LBB 4422/10 378 / 50 / 21 W
       LBB 4424/10 399 / 76 / 28 W
       LBB 4428/00 397 / 63 / 22 W
    * Alarm tone level** With pilot tone 15 V
    Mic/line inputs 2 x (4 x for LBB 4428/00)
    Connector 6-pole header for removable screw connector (mono, balanced)
    Line
    Frequency response -3 dB @ 50 Hz and 20 kHz (±1 dB)
    S/N >87 dBA
    CMRR >40 dB @ 1 kHz
    Input range -6 dBV to 6 dBV
    Input impedance 22 kohm
    Mic
    Frequency response -3 dB @ 100 Hz and 16 kHz
    Nominal input level -57 dBV
    S/N >62 dBA with 25 dB headroom
    CMRR 40 dB at 1 kHz
    Input impedance 1360 ohm
    Phantom supply 12 V ±1 V @ 15 mA
    Input range -7 dBV to +8 dBV ref nominal input value
    Control inputs 8 x
    Connectors Removable screw terminals
    Operation Closing contact (with supervision)
    Control outputs 1 x per amplifier channel
    Connectors Removable screw terminals
    Loudspeaker outputs LBB 4421/10
    Rated load resistance 20 ohm (100 V); 10 ohm (70 V)
    Rated load capacitance 250 nF (100 V); 500 nF (70 V)
    Rated output power(per channel)    500 W (1 min. at 55 °C)
    250 W (30 min. at 55 °C, cont. at 30 °C)
    125 W (cont. at 55 °C)
    Loudspeaker outputs LBB 4422/10
    Rated load resistance 40 ohm (100 V); 20 ohm (70 V)
    Rated load capacitance 125 nF (100 V); 250 nF (70 V)
    Rated output power(per channel)    250 W (1 min. at 55 °C)
    125 W (30 min. at 55 °C, cont. at 30 °C)
    60 W (cont. at 55 °C)
    Loudspeaker outputs LBB 4424/10
    Rated load resistance 80 ohm (100 V); 40 ohm (70 V)
    Rated load capacitance 60 nF (100 V); 125 nF (70 V)
    Rated output power(per channel)    125 W (1 min. at 55 °C)
    60 W (30 min. at 55 °C, cont. at 30 °C)
    30 W (cont. at 55 °C)
    Loudspeaker outputs LBB 4428/00
    Rated load resistance 160 ohm (100 V); 80 ohm (70 V)
    Rated load capacitance 30 nF (100 V); 60 nF (70 V)
    Rated output power(per channel)    60 W (1 min. at 55 °C)
    30 W (30 min. at 55 °C, cont. at 30 °C)
    15 W (cont. at 55 °C)
    Connectors 9-pole header for removable screw connector
    Frequency response 60 Hz (80 Hz for LBB 4428/00) to 19 kHz (-3 dB)
    S/N >85 dB (no pilot tone)
    Crosstalk <80 dB at nominal load for 1 kHz
    Distortion <0.3% (@ 1 kHz) @ 50% of rated output power
    Dimensions (H x W x D)
    for tabletop use, with feet 92 x 440 x 400 mm(3.6 x 17.3 x 15.7 in)
    for 19” rack use, with brackets 88 x 483 x 400 mm(3.5 x 19 x 15.7 in)
       in front of brackets 40 mm (1.6 in)
       behind brackets 360 mm (14.2 in)
    Weight
       LBB 4421/10 13 kg (28.7 lb)
       LBB 4422/10 14 kg (30.9 lb)
       LBB 4424/10 16.5 kg (36.4 lb)
       LBB 4428/00 14.5 kg (32 lb)
    Mounting Standalone; 19”-rack
    Color Charcoal with silver
    Operating temperature -5 ºC to +55 ºC (+23 ºF to +131 ºF)
    Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
    Relative humidity 15% to 90%
    Air pressure 600 to 1100 h Pa

    Images

     
  • Certificates (3)
     
  • Documents (1)
    Title Type Language
    Data Sheet PDF
     
 

Product variants

LBB4428/00 Power amplifier, 8x60W

Rack unit 2 HU, 8-channel power amplifier with Praesideo network connection, 8 x 60 W.

Commercial Type No.: LBB4428/00
Product No.: F.01U.029.447

 

Accessories

LBB4440/00 Supervision control board

LBB4440/00 Supervision control board

Line and loudspeaker supervision master PCB for mounting in a Praesideo network connected power amplifier, one board is needed per channel.

Commercial Type No.: LBB4440/00
Product No.: F.01U.513.883

 
End-of-line supervision set

End-of-line supervision set

Master and slave PCB for supervising a single loudspeaker line. The master is mounted in a Praesideo network connected power amplifier (one per channel); the slave is connected at the end of the loudspeaker line.

Commercial Type No.: LBB4442/00
Product No.: F.01U.074.440