BOSCH PLN-P1000

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BOSCH PLN‑1P1000 Plena Power Amplifier

* 1000 W power amplifier in a 3U high housing
* EN 54‑16 certified and EN 60849 compliant
* 70 V / 100 V and 8 ohm outputs
* Dual inputs with priority switching
* 100 V input for slave operation on 100 V speaker line

The PLN-1P1000 is a powerful 1000 W power amplifier in a 3U 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.

Functions.

Dependability

The amplifier is protected against overload and short circuits. A temperature-controlled fan ensures high reliability at high output levels, and low acoustic noise at lower output levels. An overheat protection circuit switches off the power stage and activates an LED on the front panel, if the internal temperature reaches a critical limit due to poor ventilation or overload. The unit operates both on mains power and on a 24 V battery power supply for emergency back up, with automatic switchover. For emergency and evacuation use, the following functions are monitored: mains presence, battery present, pilot tone presence, amplifier operation. Front panel LEDs indicate the status of supervised functions. The of pilot tone supervision and battery status LEDs can be switched off for general public address use. Failsafe (normally energized) relays are provided for each supervised function. These relays are always active regardless of the switches on the rear panel.

Input
The system has two balanced inputs with priority control, each with a loop-through facility. This makes it easy to connect remote systems that require priority control. An additional 100 V line input can connect the amplifier to a 100 V loudspeaker line, to provide more power to remote locations.

Output
The amplifier has 70 V and 100 V outputs for constant voltage loudspeaker systems, and a low impedance output for 8 ohm loudspeaker loads. A meter with LED-bar shows the output level. The PLN-1P1000 has two separate priority controlled 100 V outputs for zones that only need announcements made via the priority input, and for zones that will not get any announcements made via the priority input.

Controls and indicators

Front
• LED level meter
• Battery operation LED
• Overheat LED

Back
• Power button
• Mains switch

Interconnections

Back
• Priority line input 1 (XLR/balanced)
• Line loop-through 1 (XLR/balanced)
• Program line input 2 (XLR/balanced)
• Line loop-through 2 (XLR/balanced)
• Priority controlled loudspeaker outputs
• 24 VDC power supply terminal
• Three loudspeaker direct outputs
• Two 100 V slave inputs
• Input 1 enable control terminal
• Input 2 priority control terminal
• Earth connection screw
• Mains socket

Technical specifications

Electrical

• Mains power supply :
• Voltage 230 VAC, ±10%, 50/60 Hz
• Inrush current 16 A
• Max power consumption 2200 VA
• Battery power supply :
• Voltage 24 VDC +15% / -15%
• Current max 48 A
• Performance :
• Output power (rms/maximum) 1000 W / 1500 W
• Power reduction on backup power -1 dB
• Frequency response 50 Hz to 20 kHz (+1/-3 dB at -10 dB ref. 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 2200 W
• -3dB 1472 W
• -6dB 1058 W
• Pilot tone* 345 W
• Idle 115 W
• 24 VDC operation
• Max power 62 A (1500 W)
• -3 dB 34 A (823 W)
• -6 dB 25 A (597 W)
• Pilot tone* 7.6 A (182 W)
• Idle 1.5 A (36 W)
• * 20 kHz -20dB with maximum loudspeaker load

Mechanical

• Dimensions (H x W x D) 145 x 430 x 430 mm (19″ wide, 3U high, with feet)
• Weight Approx. 32 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 <40 dB SPL @ 1 m temperature controlled