Bosch Audio PRA-EOL-US End-of-line Device

Product Description

The BOSCH AUDIO PRA-EOL-US is an end-of-line device designed for use in professional audio distribution and paging systems. End-of-line devices are passive termination components installed at the final speaker or zone output in a supervised speaker line circuit. They allow the system controller to continuously monitor line integrity, detecting open-circuit or short-circuit faults before they compromise system performance. This component is sold individually and is intended for installation by qualified audio or low-voltage systems technicians.

This device is used in commercial and institutional paging, public address, and distributed audio systems where line supervision is required. Supervised speaker circuits are common in life-safety audio applications, background music systems, and facility-wide paging installations. The PRA-EOL-US is installed at the end of a speaker branch circuit to close the supervision loop and enable fault detection at the system controller or amplifier panel.

Key Features

• Enables continuous line supervision on speaker branch circuits
• Supports fault detection for open-circuit and short-circuit conditions
• Passive termination device requiring no external power
• Sold as a single unit for flexible deployment across multiple zones
• Designed for professional audio and paging system applications

Compatibility

Designed as an OEM-style end-of-line termination accessory for supervised speaker line circuits in professional distributed audio and paging systems.

Installation Notes

Installation should be performed by a qualified low-voltage or audio systems technician familiar with supervised speaker circuit requirements. Power down or de-energize the amplifier and controller before working on speaker line connections. Refer to the system controller documentation for proper termination impedance and supervision configuration requirements. Follow all applicable local codes and manufacturer guidelines for low-voltage wiring.