This cabinet speaker is equipped with 2 loudspeakers as well as with 2 transformers. Thanks to placing two speakers inside one chassis, this speaker is space-saving solution for A/B division and wiring of the required alarming loudspeakers according to DIN EN 60849. Advantage above the usual A/B wiring (2 separate units) is the same, high level of operating range. In case of a line failure no under served range will occur. Such solution has a positive impact on speaking comprehensiveness and on the efficiency and safety of alarming