Bosch PRA-AD608 PRAESENSA 600W 8-Channel Network Amplifier

Bosch PRA-AD608 PRAESENSA 600W 8-Channel Network Amplifier

The Bosch PRA-AD608 is a professional-grade 8-channel network amplifier engineered for Public Address and Voice Alarm applications requiring maximum flexibility and redundancy. Delivering 600W total power output across transformerless 70V/100V loudspeaker systems, this 1U rack-mount amplifier features intelligent power partitioning that dynamically allocates available power across all eight channels based on actual load requirements. The integrated spare channel provides automatic failover redundancy, ensuring continuous operation even during primary channel failures—critical for life safety and emergency communication systems.

Built on OMNEO Audio-over-IP technology (compatible with Dante and AES67), the PRA-AD608 supports both centralized and decentralized system topologies through dual Ethernet ports with RSTP redundancy. Each amplifier channel includes independent digital signal processing (DSP) with parametric equalization, limiting, and delay adjustments, enabling precise acoustic optimization for individual loudspeaker zones. Class D amplifier technology with two-level power delivery achieves exceptional efficiency across all operating conditions, minimizing heat dissipation and reducing battery capacity requirements for backup power systems. Comprehensive supervision features monitor amplifier operation, loudspeaker line integrity (via optional end-of-line devices), network connectivity, and power supply status, with faults reported to system controllers and logged for maintenance analysis.

Key Features:

• Flexible 600W Power Partitioning: Dynamically distributes total power capacity across all eight channels based on actual loudspeaker loads; enables effective utilization of available amplifier power and reduces total amplifier count compared to traditional fixed-power-per-channel designs.
• Integrated Spare Channel Redundancy: Built-in independent 600W spare channel automatically substitutes for failed primary channels; maintains complete system operation during amplifier failures without requiring external redundancy equipment or manual intervention.
• OMNEO Audio-over-IP Networking: Delivers 48kHz/24-bit digital audio via OMNEO (Dante/AES67 compatible) with dual Ethernet ports supporting RSTP loop-through topology; enables flexible distributed amplifier placement and eliminates analog audio distribution infrastructure.
• Per-Channel Digital Signal Processing: Independent DSP on all eight channels provides parametric equalization, limiting, and delay functions; optimizes sound quality and speech intelligibility for each loudspeaker zone's unique acoustic characteristics and coverage requirements.
• A/B Redundant Loudspeaker Outputs: Each channel features independent A and B outputs with individual supervision and fault isolation; supports redundant loudspeaker wiring topologies including Class A loop configurations for maximum system reliability.
• High-Efficiency Class D Technology: Two-level power line architecture delivers superior efficiency across all operating conditions; minimizes heat dissipation, reduces cooling requirements, and extends battery runtime during backup power operation.
• Comprehensive System Supervision: Monitors amplifier channels, loudspeaker line integrity (with EOL devices), network connectivity, DC power inputs, and temperature; reports faults to system controller with detailed logging for maintenance planning.
• Dual 48V DC Power Inputs: Redundant DC power supplies with polarity reversal protection operate in tandem; each input features full-power DC/DC converter ensuring continued operation during single power supply failures.