JBL Control 24CT Micro 2-Way Vented Ceiling Speaker Built-in Transformer, 4" Woofer, Pair Coaxially mounted 100 mm (4 in) woofer with butyl rubber surround and 19 mm ( in) titanium coated diffraction-loaded tweeter High power, wide frequency response and low distortion for high sound level capability Wide coverage allows fewer speakers, reducing the cost of the installed sound system without sacrificing performance Packaged with grille, backcan and tile rails for fast installation and easy dealer stocking Th