High-quality dual-cone ceiling speakernHigh 96 dB sensitivityn5 Watt multi-tap transformer for 100V, 70V and 25V distributed linesn120 degree conical coveragenRequires CSS-BB8 pre-install backcan; tile rails optionalnJBL¡¯s Commercial Series Ceiling Speakers provide excellent performance for paging and background music applications. High sensitivity across the product line provides maximum sound level, even at low tap settings.