JBL CONTROL 26C 6.5" Ceiling Loudspeaker Transducer Assemblies (sold as pair) Coaxially mounted 165 mm (6.5 in) woofer with butyl rubber surround and 19 mm (.75 in) titanium coated diffraction-loaded tweeter. High power, wide frequency response and low distortion for high sound level capability. JBLs exclusive SonicGuard overload protection allows higher operational levels and improved system reliability. Packaged with grille, back can and tile rails for fast installation and easy dealer stocking.