Line Manager
The most secure solution for 70/100 V Audio Distribution
When it is easier to have one speaker run, for example: if requirements on zoning are low or the sizes of zones are very large, 70/100 V audio distribution could be the preferred solution. This can also be the case, if an existing installation is expanded, or an out-dated central unit replaced, where 70/100 V lines already exist.
It is even possible to create a hybrid system which combines VAB-Line technology with 70/100 V systems. For example: 70/100 V audio distribution is adequate in a car parking lot, while in the department stores of the same facility, a digital public address system is used.
Line Manager – all Features at a Glance:
- Conversion of 8-channel digital DSS bus audio into analog signals
- Distribution of analog signals to 70/100 V amplifiers
- Flexibility to use any type of 70/100 V amplifier on the market.
- Permanent surveillance of amplifier channels
- Fail-safe operation with 2 hot standby channels in case of amplifier failure
- Automatic switch to hot standby amplifier channel in case of amplifier channel failure
- Permanent surveillance of speaker runs through impedance measurements
- Use of pulsed 20kHz pilot tone makes surveillance inaudible and consumes low energy
- Error messages for short-circuit, ground leakage, interruptions of speaker run and amplifier faults
- Immediate disconnection of loudspeaker lines affected by a ground leakage