This system enables communication between people separated by acoustic barriers.
The system is easy to use, with 24VDC low-voltage lines, and is operated with a button by the operator on the inside
who can independently adjust the volume of the inside and outside speakers.

The system comprises 6 elements:
- 1 microphone mod. MV1511 installed on a vertical surface;
- 1 CENT-PA unit;
- 1 power supply 24VDC: JL L24DE or TU ALBD501;
- 1 MCZ501, MC500, MC1501 microphone stand;
- 2 R508L, S508, P508, F508, K508, etc. active speakers.
 

The complete kit TU SIA3 is available as an alternative.