Bosch PRAESENSA PRA-AD604 – 600W 4-Channel Amplifier

The Bosch PRAESENSA PRA-AD604 – 600W 4-Channel Amplifier is a powerful, flexible, and highly efficient multi-channel amplifier designed for modern Public Address and Voice Alarm (PA/VA) systems. With OMNEO IP-network connectivity, DSP processing, intelligent power distribution, and full system supervision, it is ideal for both centralized and decentralized PRAESENSA system architectures.

Its compact design and advanced redundancy features ensure mission-critical reliability across large installations such as airports, shopping malls, universities, hotels, transportation hubs, industrial complexes, and stadiums.

🔹 Efficient 4-Channel Power Amplification

The PRA-AD604 delivers:

• 600W total power, shared flexibly across all four channels

• Transformerless, galvanically isolated 70/100V outputs

• Automatic optimization of power per channel depending on connected load

• Integrated spare channel for fail-safe amplifier redundancy

This architecture reduces the number of amplifiers required in a system and minimizes operational costs.

🔹 Flexible Loudspeaker Topologies

The amplifier supports:

• A/B outputs per channel for redundant loudspeaker wiring

• Class-A loop wiring using end-of-line devices for complete loop supervision

• Load-independent frequency response for consistent audio quality

• Support for any loudspeaker load up to maximum capacity

This ensures flexible, safe, and standards-compliant loudspeaker distribution.

🔹 Superior Audio Quality with Integrated DSP

Using OMNEO Audio-over-IP (Dante/AES67 compatible), the amplifier offers:

• 48 kHz, 24-bit digital audio

• Low distortion, high signal-to-noise ratio

• Minimal crosstalk between channels

• Full DSP per channel, including:

  • EQ

  • Limiting

  • Delay

  • Zone-specific tuning

Optimized for excellent speech intelligibility and high-quality background music.

🔹 Full Supervision & Diagnostics

The PRA-AD604 monitors:

• Amplifier channel health

• Loudspeaker line integrity

• End-of-line devices

• Network connection status

• DC power supply redundancy

Faults are immediately reported to the PRAESENSA system controller and logged for diagnostics.

🔹Bosch PRAESENSA PRA-AD604 – 600W 4-Channel Amplifier Redundant IP Networking & Power

Ensures fault-tolerant operation with:

• Dual OMNEO network connections with RSTP loop support

• Dual 48 VDC inputs, each with DC/DC conversion

• Automatic failover to the integrated spare amplifier channel

• Analog backup audio lifeline (in case of network failure)

This guarantees continuous operation even during link or device failures.

Bosch PRAESENSA PRA-AD604 – 600W 4-Channel Amplifier Key Features

• 600W, 4-channel PRAESENSA amplifier

• Flexible power partitioning

• Transformerless 70/100V outputs

• Integrated spare channel for redundancy

• OMNEO (Dante/AES67) IP networking

• Built-in DSP per channel

• Low power consumption and heat dissipation

• Full supervision of all connections

• Dual network + dual DC power redundancy

• Analog backup audio lifeline

    Ideal Applications

• Airports & transportation hubs

• Shopping malls & commercial buildings

• Universities & campuses

• Hospitals & healthcare networks

• Hotels & convention centers

• Metro/railway stations

• Industrial facilities

• Stadiums & large venues