Public Address Amplifier

This unit is installed in every car of the train. It contain audio power amplifier to drive the associated loudspeakers.

The Public Address Amplifier unit is a microcontroller based intelligent unit.
Sound operated automatic level adjusting system (SOALAS) to provide optimise sound output as per ambient noise level.
This unit act as a hub for train data bus to drive data signals for displays.
The power amplifier is rated to deliver 40W rms (under minimum DC supply conditions).

Microprocessor based control.
Seven frequency band graphic equalising function.
Proprietary SOALAS functionality to adjust gain as per sampled ambient level for PA announcement.
Configuration & setting through Notebook PC.
Aluminium natural colour extrusion enclosure.
Driving of loudspeakers.
40W audio amplifier.
Interface to speech pair & train data bus.
Approximate mechanical size: 520 mm (D) × 432 mm (W) × 162 mm (H).
Weight: 9 kgs. (approx.).