Exponential loudspeaker of 40 W of power in line of 100 V and sockets for 40, 23, 15, 12, 6 and 3 W, with EN 54-24 certificate. It is a very suitable equipment for public address and voice alarm systems in tunnels, specially designed to increase directionality and offer the best possible intelligibility in difficult acoustic environments, as well as to work in harsh environments, thanks to its IP67 degree of protection. its ability to operate in a wide temperature range and its high acoustic pressure. The EN 54-24 certificate allows this loudspeaker to be integrated into any public address and voice alarm system that must comply with the EN 54 standard.