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Bosch LBB4428/00 8-Channel Power Amplifier for Praesideo Emergency Voice Alarm Systems
- Regular price
- $1,525.00
- Sale price
- $1,525.00
- Regular price
-
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Product Description P/N: LBB4428/00
Description
The Bosch LBB4428/00 8-Channel Power Amplifier is a high-capacity network audio amplifier designed for Praesideo public address and emergency voice evacuation systems. It provides eight independent 60 W amplifier channels with integrated audio processing, loudspeaker supervision, and redundant network connectivity for critical communication environments. The unit supports 100 V, 70 V, and 50 V loudspeaker outputs, making it suitable for large-scale distributed audio installations.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Bosch |
| Category | Public Address Systems |
| Part Number | LBB4428/00 |
| Subcategory | Multi-Channel Power Amplifiers |
| Amplifier Channels | 8 Channels |
| Rated Output Power | 8 x 60 W |
| Speaker Output Tappings | 100 V / 70 V / 50 V |
| Network Connectivity | Praesideo Network |
| Audio Inputs | 4 Mic/Line Inputs |
| Control Inputs | 8 Programmable Inputs |
| Control Outputs | 8 Outputs (1 per Channel) |
| Frequency Response | 80 Hz to 19 kHz (-3 dB) |
| Signal-to-Noise Ratio | >85 dB |
| Distortion | <0.3% at 1 kHz |
| Power Supply | 100 to 240 VAC ±10%, 50/60 Hz |
| Backup Power Input | 48 VDC |
| Power Consumption | 430 W Maximum |
| Mounting Type | Standalone or 19-inch Rack Mount |
| Operating Temperature | -5°C to +55°C |
| Certifications | EN 54-16, ISO 7240-16, IEC 60945 |
| Dimensions | 88.9 x 482.6 x 398.8 mm |
| Weight | 15.8 kg |
Information About LBB4428/00
The LBB4428/00 is a Praesideo series multi-channel power amplifier engineered by Bosch for professional voice alarm and public address applications. It combines eight amplifier channels, digital signal processing, line supervision, and spare amplifier switching within a single rack-mount chassis for centralized audio distribution systems. The amplifier supports both single branch and redundant loop network cabling while continuously reporting operational status to the network controller for system monitoring and fault management. Designed for EN 54-certified emergency installations, the unit includes programmable control inputs and outputs, local audio inputs, pilot tone supervision, and integrated backup power support for uninterrupted operation.
Key Features:
- Eight Amplifier Channels: Provides eight independent 60 W audio output channels for distributed loudspeaker systems.
- Multiple Output Tappings: Supports selectable 100 V, 70 V, and 50 V speaker line configurations.
- Integrated Audio DSP: Includes parametric EQ, shelving EQ, configurable delay, and automatic volume control.
- Loudspeaker Line Supervision: Monitors speaker lines and detects short-circuit and short-to-ground faults.
- Redundant Network Support: Compatible with both branch and loop network topologies for enhanced reliability.
- Spare Amplifier Switching: Built-in relay functionality allows automatic changeover to backup amplifiers.
- Programmable Control Inputs: Features eight supervised control inputs and channel-specific control outputs.
- EN 54 Certified Design: Approved for emergency voice alarm and evacuation system applications.
The LBB4428/00 delivers the reliability and precision required for professional public address, emergency evacuation, and distributed audio communication systems.
Description
The Bosch LBB4428/00 8-Channel Power Amplifier is a high-capacity network audio amplifier designed for Praesideo public address and emergency voice evacuation systems. It provides eight independent 60 W amplifier channels with integrated audio processing, loudspeaker supervision, and redundant network connectivity for critical communication environments. The unit supports 100 V, 70 V, and 50 V loudspeaker outputs, making it suitable for large-scale distributed audio installations.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Bosch |
| Category | Public Address Systems |
| Part Number | LBB4428/00 |
| Subcategory | Multi-Channel Power Amplifiers |
| Amplifier Channels | 8 Channels |
| Rated Output Power | 8 x 60 W |
| Speaker Output Tappings | 100 V / 70 V / 50 V |
| Network Connectivity | Praesideo Network |
| Audio Inputs | 4 Mic/Line Inputs |
| Control Inputs | 8 Programmable Inputs |
| Control Outputs | 8 Outputs (1 per Channel) |
| Frequency Response | 80 Hz to 19 kHz (-3 dB) |
| Signal-to-Noise Ratio | >85 dB |
| Distortion | <0.3% at 1 kHz |
| Power Supply | 100 to 240 VAC ±10%, 50/60 Hz |
| Backup Power Input | 48 VDC |
| Power Consumption | 430 W Maximum |
| Mounting Type | Standalone or 19-inch Rack Mount |
| Operating Temperature | -5°C to +55°C |
| Certifications | EN 54-16, ISO 7240-16, IEC 60945 |
| Dimensions | 88.9 x 482.6 x 398.8 mm |
| Weight | 15.8 kg |
Information About LBB4428/00
The LBB4428/00 is a Praesideo series multi-channel power amplifier engineered by Bosch for professional voice alarm and public address applications. It combines eight amplifier channels, digital signal processing, line supervision, and spare amplifier switching within a single rack-mount chassis for centralized audio distribution systems. The amplifier supports both single branch and redundant loop network cabling while continuously reporting operational status to the network controller for system monitoring and fault management. Designed for EN 54-certified emergency installations, the unit includes programmable control inputs and outputs, local audio inputs, pilot tone supervision, and integrated backup power support for uninterrupted operation.
Key Features:
- Eight Amplifier Channels: Provides eight independent 60 W audio output channels for distributed loudspeaker systems.
- Multiple Output Tappings: Supports selectable 100 V, 70 V, and 50 V speaker line configurations.
- Integrated Audio DSP: Includes parametric EQ, shelving EQ, configurable delay, and automatic volume control.
- Loudspeaker Line Supervision: Monitors speaker lines and detects short-circuit and short-to-ground faults.
- Redundant Network Support: Compatible with both branch and loop network topologies for enhanced reliability.
- Spare Amplifier Switching: Built-in relay functionality allows automatic changeover to backup amplifiers.
- Programmable Control Inputs: Features eight supervised control inputs and channel-specific control outputs.
- EN 54 Certified Design: Approved for emergency voice alarm and evacuation system applications.
The LBB4428/00 delivers the reliability and precision required for professional public address, emergency evacuation, and distributed audio communication systems.