خانه صوت و کنفرانس بوشPublic Address and Voice AlarmDigital PA and Emergency Sound Praesideo System

PRS‑xPxxx and LBB 4428/00 Power Amplifiers

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Technical Specifications
Electrical Mains power supply
Voltage
PRS‑xPxxx 115 / 230 VAC ±10%, 50/60 Hz
LBB 4428/00 100 to 240 VAC ±10%, 50/60 Hz
Power consumption Pmax -3 dB* / idle** / standby
PRS‑1P500 350 / 50 / 20 W
PRS‑2P250 350 / 53 / 21 W
PRS‑4P125 350 / 66 / 23 W
LBB 4428/00 430 / 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
PRS‑1P500 330 / 40 / 10 W
PRS‑2P250 330 / 43 / 11 W
PRS‑4P125 330 / 56 / 13 W
LBB 4428/00 400 / 65 / 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 leve -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 channe
Connectors Removable screw terminals
Performance
Frequency response
PRS‑xPxxx 60 Hz to 19 kHz (-3 dB)
LBB 4428/00 80 Hz 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
Loudspeaker outputs PRS‑1P500
Rated load resistance 20 ohm (100 V); 10 ohm (70 V) 5 ohm (50 V)
Rated load capacitance 250 nF (100 V); 500 nF (70 V) 1000 nF (50 V)
Rated output power 500 W (1 min. at 55 °C)
(per channel) 250 W (30 min. at 55 °C, cont. at 30 °C)
125 W (cont. at 55 °C)
Connector 9‑pole header for removable screw connector
Loudspeaker outputs PRS‑2P250
Rated load resistance 40 ohm (100 V); 20 ohm (70 V) 10 ohm (50 V)
Rated load capacitance 125 nF (100 V); 250 nF (70 V) ) 500 nF (50 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)
Connector 9‑pole header for removable screw connector
Loudspeaker outputs PRS‑4P125
Rated load resistance 80 ohm (100 V); 40 ohm (70 V) 20 ohm (50 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)
Connector 9‑pole header for removable screw connector
Loudspeaker outputs LBB 4428/00
Rated load resistance 166 ohm (100 V); 83 ohm (70 V) 42 ohm (50 V)
Rated load capacitance 30 nF (100 V); 60 nF (70 V) ) 120 nF (50 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)
Connector 9‑pole header for removable screw connector
Mechanical 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 behind brackets
Weight
PRS‑1P500 12.6 kg (27.78 lb)
PRS‑2P250 13.6 kg (29.98 lb)
PRS‑4P125 16.1 kg (35.49 lb
LBB 4428/00 15.8 kg (34.83 lb)
Mounting Standalone; 19”-rack
Color Charcoal with silver
Environmental Operating temperature -5 to +55 ºC (+23 ºF to +131 ºF)
Storage temperature -40 to +70 ºC (-40 ºF to +158 ºF)
Relative humidity 15% to 90%
Air pressure 600 to 1100 hPa
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