JBL MTC-SB2W Installation Instructions

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The JBL MTC-SB2W is a bracket for installing the JBL Control SB2 Subwoofer onto a wall
or into a corner. The bracket acts as an enclosed shelf upon which the SB2 sits. The
bracket's outside lip and securing screws keep the subwoofer from sliding off or jumping out
of the support.
Warning: This bracket is not intended to be used ANY other way.
Step 1: Install the bracket SAFELY to the building's structure. IT IS THE
RESPONSIBILITY OF THE INSTALLER TO DETERMINE THE STRENGTH OF THE
BUILDING STRUCTURE AND TO ENSURE THE SAFETY OF THE BRACKET
INSTALLATION TO THE BUILDING STRUCTURE!
The bracket and Subwoofer MUST be oriented as shown in Diagrams 1 & 2.
Step 2: Remove the three (3) bottom screws on the front of the load-baffle of the Control
SB-2 (see diagram 3)
Step 3: Connect appropriate wires to Control SB2 terminal cup.
Step 4: Set the Control SB2 into the bracket frame.
Step 5: Secure the Control SB2 to the bracket by reinstalling the three (3) removed load-
baffle screws through the holes in the front of the bracket. Secure the screws into the
subwoofer. (see diagram 4).
Step 6: Apply a secondary safety strap between a secondary building structure point and
the subwoofer/bracket assembly as a backup support. The safety strap and all
attachments must be capable of holding the product, keeping it from falling in case of
catastrophic failure of the primary bracket mounting to the building structure.
Hints for Locating the Control SB-2 for Proper Output Sensitivity – The placement of
the Control SB-2 can be used as a tool for adjusting the subwoofer output level to match
those of the satellite speakers. Positioning the SB-2 close to the junction of 3 boundaries
(ceiling/wall/wall junction or floor/wall/wall junction) yields maximum output sensitivity.
Placement at the junction of 2 boundaries (wall/wall junction) reduces the subwoofer
sensitivity by 3dB. Placement along a flat wall further reduces subwoofer sensitivity by
another 3dB for better tonal balance with less efficient or high impedance satellite systems.