The JBL Control 24CT compact in-ceiling speaker is perfect for background music and music-plus-paging systems. From the Manufacturer: The Control 24CT is a compact in-ceiling speakers, providing full, high quality sound for background music and music-plus-paging systems. Features: Coaxially mounted 100 mm (4 in) woofer with butyl rubber surround and 19 mm (.75 in) titanium coated High power, wide frequency response and low distortion for high sound level capability. Wide coverage allows fewer speakers, reducing cost Packaged with grille, backcan and tile rails for fast installation and easy dealer stocking. Specifications: Frequency Range: 80 Hz - 20 kHz Power Rating: See transformer taps Transformer Taps: 70V: 30W, 15W, 7.5W (& 3.7W @ 70V) Coverage Angle: 130° conical Directivity Factor (Q): 2.4 dB averaged 500 Hz to 4 kHz Directivity Index (DI): 3.8 dB averaged 500 Hz to 4 kHz Maximum SPL (1m): 102 dB (top 70V/100V tap) Nominal Impedance: 16 ohms (Min Z 16.1 ohms @ 320 Hz) Sensitivity: 86 dB (100 Hz - 10 kHz) Input Connectors: Removable 4-pin locking connector with screw-down terminals. Drivers: LF Driver: 100 mm (4.0 in) HF Driver: 19 mm (0.75 in) Color: White Safety Agency: Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849. Backcan: formed steel (included "blind-mount") Baffle/Rim: Medium impact polystyrene, fire rated UL94V-0 Ceiling Cutout Size: 168 mm (6.6 in) diameter (cardboard cutout template included) Included Accessories: C-shaped support backing plate 2 tile support rails (fits both 2 x 4 ft or 600 x 1200 mm tiles) Cutout template Paint shield Removable locking wiring connector Plenum Usage: Yes, backcan included