JBL Control 29AV-1 InvisiBall Threading Specifications - Page 1

InvisiBall™ Threading Control Contractor Surface-Mount Loudspeakers Following are the threading specifications for the InvisiBall™ mounting system of JBL Control Contractor loudspeakers. Loudspeaker Model Regular InvisiBall™ MTC-xxCM (included with the loudspeaker) Optional Ceiling-Mount Adapter Threading Diameter Length of Threading Diameter Length of & Pitch Threading & Pitch Threading Control 23 Control 23T 6 mm diameter, 22mm 1.0 mm thread pitch (0.8 inch) 1/4 inch diameter, 20 threads per inch 22mm (0.8 inch) Control 25 Control 25T Control 25AV Control 25AV-LS Control 28 Control 28T-60 7/16 inch diameter, 20 threads per inch 26mm (1.0 inch) 7/16 inch diameter, 20 threads per inch 34mm (1.3 inch) Control 29AV (C29AV-1) Control 30 7/16 inch diameter, 30mm 20 threads per inch (1.2 inch) 16 mm diameter, 2.0 thread pitch 60 mm (2.3 inch) 12 mm diameter 1.75 thread pitch 16 mm diameter, 2.0 thread pitch 48mm (1.9 inch) 60 mm (2.3 inch) 04/11