The Control 24CT is a compact in-ceiling speaker 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 • Packaged with grille backcan and tile rails for fast installation and easy dealer stocking. **SOLD IN PAIRS.