JBL Control 26CT - Ceiling Speaker 6.5 Inch 70V 100V Multi Tap Transformer 19mm Tweeter (White, Pair) With Multitap Transformer for 70V/100V Systems Ceiling Mount Coaxially mounted 165 mm 6.5 inch woofer with butyl rubber surround and 19 mm titanium coated diffraction-loaded tweeter.