The unit shall be constructed as a line-array of six 4” full-range loudspeakers, equipped with moisture resistant diaphragms and shall be designed for use in 100 V/70 V professional audio installations. The unit is intended for use in both public address and voice alarm systems and shall be compliant with EN 54-24. The unit shall be suitable for both indoor and outdoor use and therefore shall be compliant with the environmental requirements of EN 54-24 for both types A & B.
The audio signal shall be connected to a ceramic terminal block. A thermal fuse shall be included in the internal audio path to disconnect the unit from the 100 V/ 70V line should the unit be exposed to extreme heat and/or fire. An additional internal fuse shall be used to protect the unit from excess current. All connectors, fuses and switches shall be grouped together inside the unit and shall be accessible from a cover plate on the front of the unit. A gland shall be provided for cable entry on the rear of the unit.
A LED shall be fitted to the loudspeaker baffle which illuminates on detection of a constant high frequency pilot-tone, which shall indicate that the unit is properly connected to the 100 V/70 V line. The LED shall be visible with the grill installed.
The enclosure shall be constructed of steel finished with an epoxy coating. At the back side of the enclosure a total of two bracket attachment points shall be provided (located near the outer ends). The protective front shall consist of a perforated steel grill which can be clicked onto four snap-in studs mounted on the enclosure. For added security grill security screws shall be provided to lock the steel grill in place.