BOSCH PLE-1P120-IN Class-D Power Amplifier 120W
Bosch PLE-1P120-IN 120W Class-D Power Amplifier delivers clean and reliable amplification for public address systems. Supports 70V/100V constant-voltage and 4Ω low impedance speaker outputs. Features 100V slave input, strong protection circuitry, rack mount 1U 19” chassis, and excellent signal-to-noise ratio >70 dB—ideal for commercial paging and audio distribution.
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BOSCH PLE-1P120-IN Class-D Power Amplifier 120W
The Bosch Plena PLE-1P120-IN is a high-efficiency 120W Class-D power amplifier, engineered for professional public address and background music systems. Built inside a rugged 19” rack-mount 1U chassis, it is suitable for both rack installation and tabletop use, offering dependable audio performance and long-term reliability.
This amplifier supports multiple loudspeaker output configurations, including 70V / 100V constant voltage lines and 4Ω low-impedance loads, making it ideal for factories, warehouses, offices, schools, malls, and industrial PA installations.
BOSCH PLE-1P120-IN Class-D Power Amplifier 120W Key Features
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120W RMS output power for wide-area speaker coverage
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Multiple loudspeaker outputs: 70V / 100V and 4Ω
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Excellent Signal-to-Noise Ratio: >70 dB for clean sound
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100V direct input for slave operation / line extension
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Front LEDs for Power On / Signal / Clip / Fault
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Rear gain control prevents accidental adjustments
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XLR loop-in / loop-through for easy commissioning and expansion
BOSCH PLE-1P120-IN Class-D Power Amplifier 120W Amplifier Protection & Safety
The PLE-1P120-IN includes strong protection against:
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Overload
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Short circuits
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Over-temperature
If overheating occurs, amplifier output reduces by -3 dB (Clip LED indication). In extreme conditions, over-temperature protection mode activates (Fault LED indication). Once temperature returns to normal, output automatically restores to nominal levels.
Inputs & Outputs
Inputs
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100V line input for slave/remote power extension
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1V line input with loop-through (XLR/TRS)
Outputs
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70V / 100V outputs for transformer line matching
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4Ω output for low impedance loudspeakers
BOSCH PLE-1P120-IN Class-D Power Amplifier 120W Ideal Applications
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Industrial PA & Paging systems
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Warehouse and factory announcements
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Commercial buildings & office paging
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Schools, hospitals, and campuses
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Background music distribution
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Large speaker zones using 100V line systems
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Technical Specifications – Bosch PLE-1P120-IN
Electrical
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Rated Output Power (RMS): 120 W
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Mains Power Supply: 230 VAC
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Inrush Current: 35 A
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Max Power Consumption: 290 VA
Performance
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Frequency Response (+1 / -3 dB): 70 Hz – 18,000 Hz
(@ -10 dB of rated output power) -
THD + Noise: < 1% @ rated output power
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Signal-to-Noise Ratio: > 70 dB
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Gain: 40 dB
Inputs
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70V / 100V Slave Input: Phoenix connector (1×2)
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Slave Input Sensitivity: 100 V
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Slave Input Impedance: 40 kΩ
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Line Inputs: 1/4″ TRS jack, 3-pin female XLR
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Line Input Sensitivity: 1 V
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Line Input Impedance: > 5 kΩ
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Common-Mode Rejection Ratio (CMRR): 25 dB
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Loop-through Output: 3-pin male XLR
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Nominal Level: 1 V
Outputs
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Speaker Outputs: 70 V / 100 V / 4 Ω
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Speaker Connector Type: Phoenix connector (1×5)
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Selectable Output Voltage: 70V or 100V (internal selection)
Mechanical
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Dimensions (H × W × D): 44 × 430 × 334 mm
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Rack Size: 1U (19″)
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Weight: 5.9 kg
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Color: RAL 9017 (Traffic Black)
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Mounting Type: Rack-mounted / Tabletop
Environmental
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Operating Temperature: -5°C to +45°C
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Storage Temperature: -20°C to +70°C
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Operating Humidity: < 95% (non-condensing)
Compliance / Standards
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Safety: IEC 62368-1
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Vibration & Shock: IEC 60068-2-6; IEC 60068-2-27
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Transport: ISTA 2A 2008
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EMC Emission: CISPR 32
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EMC Immunity: CISPR 35; IEC 61000-4-3
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