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JBL Commercial Products


The MTC-81BB8 is designed for use in applications requiring preinstalled backcans and is compatible with ceiling speakers having a 286 mm (11.25 in) mounting circle diameter, such as the JBL 8138 ceiling loudspeaker, and the JBL MTC-81TB8 tile bridge for suspended ceilings.

HARMAN Professional Solutions:
  • Fits 8138 speaker and MTC-81TB8 Tile Bridge
  • Extra-large 7.4 liter (0.26 cu ft) volume allows for extra bass
  • Industry standard 286 mm (11.25 in) mounting circle
  • Five conduit knockouts
  • Nesting during storage minimizes storage space requirements
Internal Volume 7.4 liters (0.26 cubic feet)
Knockouts 0.87" (22 mm) diameter opening; 4 on side of can, 1 on top panel
Dimensions 7" (178 mm) height x 11.75" (300 mm) width and depth
Net Weight 3.2 lbs (1.5 kg)