Automatic Announcements Amplifier (Inside-Outside) for Bus & Coach


Primary benefits:

  • Automatic announcement of the name of the station (internal / external).
  • Priority for automatic announcements over a driver microphone.
  • Connection to driver microphone (new microphone design without a gooseneck stick).
  • Direct and universal access to all types of fleet management systems.
  • The system has an option to connect 2 microphones (driver + guide) with driver microphone priority
  • A small and lightweight system for quick and simple installation.
  • Find and report failures.
  • Output for additional external speaker.
  • Operating voltage 12V-24V.
  • Output power: 6x35W.

A special system that was developed by Intervox for automated internal/external announcement system.

The system if fully connected to the bus fleet management and automatically announces the name of the station that the bus is arriving to, both inside and outside of the bus.

The system also knows to find and report failures in the announcement system.

There’s also an option to connect a driver microphone (both with or without gooseneck).


Power supply:12/24 V +/- 20% (negative to ground)
Max. power consumption:5 A
Max. power output:4 x 35 W R.M.S.
Continuous power output:4 x 18 W (1% dist. a 1 kHz)
Output impedance:Between 2 – 8 Ohms (normally 4 Ohms)
Dimensions:75 x 95 x 40mm
Net weight:0.5 kg


Normal input:100 mV – 1 V (R.M.S.)
Input impedance:10 kOhms
Bandwidth:30 Hz – 12 KHz (-3 dB)
Signal / noise ratio:>50 dB.


An independent input:Guide microphone or flex neck microphone (priority)
Normal input:1.5 mV (R.M.S.)
Input impedance:2 kOhms
Bandwidth:300 Hz – 4000 Hz (-3 dB)