Classic 100V ceiling speakers are suitable here. For rooms with high ceilings, such as shopping centers, spherical speakers are particularly suitable, which can be suspended up to 5 m.

Depending on the sound reinforcement area, ceiling and wall speakers, A/B speakers and speakers certified according to EN 54-24 are used for information announcements or (repeated) automated advertising.

 Z-6a small digital control units are suitable here: the multi-zone systems with switched-mode power supply and internal fully digital power amplifier (250W / 100V) can supply up to 12 speaker zones.

This is done, for example, by the DPM-12 desk call station (for 12 zones), MSP-MS MASTER-CARD and MSP-SL SLAVE-CARD (call station input modules) and the input INTERFACE (12-zone switch + ALARM button). The control software regulates e.g. the assignment of background music and voice announcements