JBL Ceiling Loudspeakers - Manual (Page 6)

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2) The optional PLASTER-RING BRACKET (or “mud ring”) contains a circular
offset, forming a edge guide for sheet rock plastering. The bracket has wings that
attach to the building structure. Sheet rock is typically either precut or cut with a
rotary cutting tool using the outside of the plaster ring circle as a guide. The sheet
rock hole is then plastered (or “mudded”) up to the ring to create a seamless cutout.
Model
New
Construction
Bracket
Plaster-Ring
Bracket
Control 24C & 24CT MTC-24NC MTC-24MR
Control 26C & 26CT MTC-26NC MTC-26MR
Control 19CS & 19CST MTC-19NC MTC-19MR
USING INCLUDED C-BRACKET WITH SHEETROCK
For most installations, the INCLUDED C-shaped backing plate to provides adequate
reinforcement to the ceiling material, spreading out the clamping force from the tab
clamps.
CUTOUT SIZES
Packaged with the speakers are cardboard cutout templates for scribing the cutout hole
onto your ceiling surface.
Model Cutout Size
(diameter)
Control 24C & 24CT 168 mm (6.6 in)
Control 26C & 26CT 220 mm (8.75 in)
Control 19CS & 19CST 305 mm (12.0 in)
Figure 2:
Optional Plaster Ring Bracket