BOSCH PRS-4P125 Power Amplifier 4 X 125W

BOSCH PRS-4P125 Power Amplifier 4 X 125W

The Power Amplifiers are capable to be set to 100 V, 70 V and 50 V output tappings. They've come along with a short-to-ground and short-circuit detection functions and capable of generating their own pilot tone intended for supervision purposes.

Functions
The Power Amplifiers are professionally designed capable of receiving input signals over the network. They also come along with two auxiliary audio inputs for use in local audio. Their eight control inputs are made freely programmable intended for system actions and priorities are possible to be assigned to these inputs. Each control input comes along with the ability to monitor the attached line intended for open and short-circuits. Control outputs are freely programmable designed for faults and call related actions.

The 2 x 16-character display and the rotary control are designed for enabling the local status inquiries. The display is made for showing the VU-meter reading, during the audio monitoring mode is active. Audio are possible to be monitored by headphone. The units are self-monitoring and continually report their status to the network controller. They are made for supporting both single branch and redundant loop cabling. The amplifiers come along with a changeover facility designed for sparing the power amplifier switching. Changeover relays are included along with the units. The amplifiers have a 48 VDC back-up supply input.

The digital audio processing are capable of handling three parametric equalization sections and two shelving equalization sections per channel that comes alogn with configurable audio delay.

Controls and indicators
• 2 x 16-character LCD for status display
• Rotary/push control button
• Mains switch
• Voltage selector for PRS-xPxxx

Interconnections
• Mains input
• Battery backup input
• Two system network connections
• Two mic/line inputs
• Selectable 100 V, 70 V or 50 V outputs (per channel)
• Fixed 50 V output
• Eight programmable control inputs
• Control output (for each amplifier channel)
• Headphone output
• Spare amplifier connection (for each amplifier channel)

Features

• Four 125W audio outputs with audio processing and delay (selection from 100 / 70 / 50 V outputs)
• Amplifier supervision and spare amplifier switching
• Loudspeaker line and loudspeaker supervision
• Eight control inputs and four control outputs
• Supervision of line attached to control inputs
• Automatic volume control
• Two audio inputs
• Redundant network connection

Electrical

Mains Power Supply: Voltage

115 / 230 VAC +/- 10%, 50/60 Hz

Mains Power Supply: Power Consumption

Pmax -3dB: 350W (Alarm tone level)
Idle: 66W (With pilot tone 15V)
Standby: 23W

Battery Power Supply: Voltage

48 VDC -10% to +20%

Battery Power Supply: Power Consumption

Pmax -3dB: 330W (Alarm tone level)
Idle: 56W (With pilot tone 15V)
Standby: 13W

Mic/Line Inputs: No. of Mic/Line Inputs

2

Mic/Line Inputs: Connector

6-pole header for removable screw connector (mono, balanced)

Line: Frequency response

3dB at 50 Hz and 20 kHz (+/-1 dB)

Line: S/N

>87 dBA

Line: CMRR

>40 dB at 1 kHz

Line: Input range

-6 dBV to 6 dBV

Line: Input impedance

22KOhms

Mic: Frequency response

-3 dB at 100 Hz and 16 kHz

Mic: Nominal input level

-57 dBV

Mic: S/N

>62 dBA with 25 dB headroom

Mic: CMRR

40 dB at 1 kHz

Mic: Input impedance

1360 Ohms

Mic: Phantom supply

12V +/- 1V at 15 mA

Mic: Input range

-7 dBV to +8 dBV ref nominal input value

Control Inputs: No. of Control inputs

8

Control Inputs: Connectors

Removable screw terminals

Control Inputs: Operation

Closing contact (with supervision)

Control Outputs: No. of Control outputs

1x per amplifier channel

Control Outputs: Connectors

Removable screw terminals

Performance: Frequency response

60 Hz to 19 kHz (-3 dB)

Performance: S/N

>85 dB (no pilot tone)

Performance: Crosstalk

<80 dB at nominal load for 1 kHz

Performance: Distortion

<0.3% (at 1 kHz) at 50% of rated output power

Speaker Outputs: Rated load resistance

80 Ohms (100 V); 40 Ohms (70 V); 20 Ohms (50 V)

Speaker Outputs: Rated load capacitance

62 nF (100 V); 125 nF (70 V) ) 250 nF; (50 V)

Speaker Outputs: Rated output power

125W (1 min. at 55 deg. C)
60W (30 min. at 55 deg. C, cont. at 30 deg. C)
30W (cont. at 55 deg. C) (per channel)

Speaker Outputs: Connector

9-pole header for removable screw connector

Environmental

Operating temperature

-5 to 55 deg. C (23 to 131 deg. F)

Storage temperature

-20 to 70 deg. C (-4 to 158 deg. F)

Humidity

15% to 90%

Air pressure

600 to 1100 hPa

Certifications and Approvals

Certifications and Approvals

Safety: Acc. to IEC 60065 / EN 60065
Immunity: Acc. to EN 55103-2 / EN 50130-4 / EN 50121-4
Emissions: Acc. to EN 55103-1 / FCC-47 part 15B
Emergency: Acc. to EN 60849 / EN 54-16 / ISO 7240-16
Maritime: Acc. to IEC 60945

Mechanical

Mounting

Standalone, 19" rack

Dimensions (HxWxD)

For tabletop use, with feet: 92 x 440 x 400mm (3.62 x 17.32 x 15.75")
For 19" rack use, with brackets: 88 x 483 x 400mm (3.46 x 19.02 x 15.75")
In front of brackets: 40mm (1.57")
Behind brackets: 360mm (14.17")

Weight

16.1kg (35.49 lbs)