BOSCH PRS 4AEX4 Presadio Controller Spces: The PRS-4AEX4 from Bosch is an audio expander that inserts external audio into the system and extracts audio from the system. This unit has control inputs and outputs for external interfacing. BOSCH PRS 4AEX4 controller can route its audio inputs permanently or conditionally to any of the zones or to other audio outputs. The routing conditions are configured using the configuration software. The audio output can be programmed to get its signal from any of the audio inputs. The equipment can be used freestanding (tabletop) or in a 19″ rack. # Check Conference System
