3.1.2 Stacking two SB218XL speakers
Instructions are provided for stacking a second SB218XL speaker on an installed unit.
About this task
Parts and tools:
• Installer-provided 6 mm hex driver.
• BKT.136 tie-plates (sold separately).
• BKT.FLR brackets (recommended [sold separately]).
• Installer-provided serviceable thread-locking compound (recommended).
• Installer-provided acoustic or nonhardening caulking (recommended).
Note: BKT.136 tie (coupling) plates are available (sold separately) and are used to connect two
SB218XL speakers together in a stacked configuration to prevent movement or shifting of the cabinets
during use. These tie plates must be installed on stacked units prior to system use.
Note: BKT.FLR floor brackets are available from Dolby (sold separately) to secure the speaker system
to the building structure. When using the BKT.FLR brackets, the installer must supply the mounting
hardware necessary to secure the speaker system to the building structure. The holes in the bracket
are sized for M10 or 3/8- inch bolts.
Procedure
1. Place the upper SB218XL on top of the lower secured cabinet, ensuring that the rubber feet of the upper
unit properly seat within the recesses of the lower unit.
2. Locate the two-bolt tie-plate mounting locations on the sides of each cabinet.
3. Remove the two M10 bolts from the side of the lower SB218XL cabinet, and then remove the two M10
bolts from the side of the upper SB218XL cabinet.
Figure 5: Remove M10 bolts from lower and upper cabinet
4. Reinstall the M10 bolts through the BKT.136 tie plates using the included M10 washers (packaged with
BKT.136), and then tighten the M10 bolts to 12 Nm (8.9 ft-lb, 106 in-lb)
Assembling Dolby Speaker SB218XL
Dolby Speaker SB218XL Owner's Manual
14
Issue 1 Part number: 8800302
3 March 2022
