The Bosch PRA-AD604 is a 600 W, 4-channel power amplifier designed for the PRAESENSA IP-based Public Address and Voice Alarm System. It features flexible power distribution across four channels, an integrated spare amplifier channel for fail-safe redundancy, individual digital signal processing, and OMNEO IP networking for reliable audio communication and system control.

The Bosch PRA-AD608 is a 600 W, 8-channel power amplifier for PRAESENSA public address and voice alarm systems. It intelligently distributes the available output power across eight channels and features independent, supervised A/B loudspeaker outputs, digital signal processing per channel, and an integrated spare amplifier channel for automatic failover.

The Bosch PRA-AR616 combines a single 600 W channel with a relay router for up to 16 zones or 8 A/B outputs, with a spare channel and loudspeaker line supervision by end-of-line device or impedance. Scroll down for details.