The Pure Resonance Audio C5 is a 4" micro 70-volt ceiling mount speaker in a compact, lightweight, and recessed design that seamlessly blends into the ceiling. The C5 achieves a smaller footprint while maintaining robust, high-quality sound ideal for background and foreground music, paging, or sound masking in commercial environments. The intelligently engineered enclosure contains a full-range 4" driver that delivers 90Hz - 20kHz frequency response and 91dB sensitivity. Featuring a built-in 70V/100V transformer with an 8-ohm bypass, this 70V ceiling speaker is perfect for offices, retail stores, restaurants, hospitality venues, reception areas, waiting rooms, and a wide range of business applications. The C5 is quick and easy to install with the included screw-on Easy-Mounting ring.