The PRS-2P250 Power Amplifier receives input signals over the network. They have two auxiliary audio inputs for local audio, and eight control inputs which are easily programmable for actions, and priorities can also be assigned to these inputs. That control input is capable of controlling open and short circuits on the attached panel. Control outputs are freely programmable for faults and call-related actions.
The units are self-monitoring and continually report their status to the network controller. They support both single branch and redundant loop cabling. The amplifiers have a changeover facility for spare power amplifier switching. Changeover relays are included with the units. The amplifiers have a 48 V DC back-up supply input.
The digital audio processing can handle three parametric equalization sections and two shelving equalization sections per channel with configurable audio delay.
Features
Audio processing and delay for each amplifier channel
Amplifier supervision and spare amplifier switching
Loudspeaker line and loudspeaker supervision
Eight control inputs and 1, 2, 4 or 8 control outputs
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Electrical |
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Main Power Supply |
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PRS‑xPxxx |
115 / 230 VAC ±10%, 50/60 Hz |
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Power consumption |
Pmax -3 dB*/ idle / standby |
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PRS‑2P250 |
350 / 53 / 21 W |
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Battery power supply |
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Voltage |
48 VDC -10% to +20% |
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Power consumption |
Pmax -3 dB* / idle** / standby |
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PRS‑2P250 |
330 / 43 / 11 W |
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Mic/line inputs |
2 x (4 x for LBB 4428/00) |
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Connector |
6-pole header for removable screw connector (mono, balanced) |
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Line |
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Frequency response |
-3 dB @ 50 Hz and 20 kHz (±1 dB) |
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S/N |
>87 dBA |
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CMRR |
>40 dB @ 1 kHz |
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Input range |
-6 dBV to 6 dBV |
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Input impedance |
22 kohm |
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Mic |
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Frequency response |
-3 dB @ 100 Hz and 16 kHz |
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Nominal input level |
-57 dBV |
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S/N |
>62 dBA with 25 dB headroom |
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CMRR |
40 dB at 1 kHz |
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Input impedance |
1360 ohm |
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Phantom supply |
12 V ±1 V @ 15 mA |
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Input range |
-7 dBV to +8 dBV ref nominal input value |
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Control inputs |
8 x |
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Connectors |
Removable screw terminals |
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Operation |
Closing contact (with supervision) |
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Control outputs |
1 x per amplifier channel |
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Connectors |
Removable screw terminals |
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Performance |
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Frequency response |
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PRS‑xPxxx |
60 Hz to 19 kHz (-3 dB) |
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S/N |
>85 dB (no pilot tone) |
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Crosstalk |
<80 dB at nominal load for 1 kHz |
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Distortion |
<0.3% (@ 1 kHz) @ 50% of rated output power |
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Loudspeaker outputs |
PRS‑2P250 |
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Rated load resistance |
40 ohm (100 V); 20 ohm (70 V) 10 ohm (50 V) |
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Rated load capacitance |
125 nF (100 V); 250 nF (70 V) ) 500 nF (50 V) |
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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)
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Connector |
9‑pole header for removable screw connector |
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Mechanical |
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Dimensions (H x W x D) |
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for tabletop use, with feet |
92 x 440 x 400 mm (3.6 x 17.3 x 15.7 in) |
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for 19” rack use, with brackets |
88 x 483 x 400 mm (3.5 x 19 x 15.7 in) |
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in front of brackets |
40 mm (1.6 in) |
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behind brackets |
360 mm (14.2 in) |
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Weight |
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PRS‑2P250 |
13.6 kg (29.98 lb) |
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Mounting |
Standalone; 19”-rack |
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Color |
Charcoal with silver |
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Environmental |
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Operating temperature |
-5 ºC to +55 ºC (+23 ºF to +131 ºF) |
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Storage temperature |
-20 ºC to +70 ºC (-4 ºF to +158 ºF) |
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Relative humidity |
15% to 90% |