The T-528 is a fireproof ceiling speaker built-in 70v/100v transformer. The 70v/100v transformer technique reduces line losses on longer distance and allows easy parallel connection of multiple loudspeakers. The built-in 8” speaker driver is designed of wide frequency response 130-15kHz, the multiple power taps 0.38W, 0.75W, 1.5W, 3W & 6W are helpful for different applications varies from room size and ambient noise surroundings. This fireproof ceiling speaker is specially designed for fire alarm and voice evacuation system, which is designed and manufactured according to EN54-24 standard. It is ideal choice for industrial and commercial applications in hotel, school, office and factory where background music and paging is needed.