JBL P81BB, P941BB To Install the Back BOX, Back Box Depth Between Wall Studs

3.(85375.7mm)inches

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RearFront

Figure 3: P81BB/P941BB	Figure 4: Place the Back Box
Back Box Depth	Between Wall Studs

NOTE

Figure 3 shows the depth of the back box. It can be installed in walls con- structed with standard 2x4s. It is impor- tant to note that the speaker mounting frame requires a minimum depth (from the wall face to the inside back of the P81BB/P941BB Back Box) of 3-1/2 inches (88.9mm) for proper installation. This can only be achieved by using 5/8-inch (15.9mm) drywall on the wall face. It is recommended that the installer consult with the drywall installer before begin- ning the installation.

CAUTION

Installers are advised to wear work gloves and face masks when installing the back box and making wire con- nections, as the back box contains fiberglass.

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TO INSTALL THE BACK BOX

1.Use a tape measure to determine the location where the speaker is to be mounted. Refer to the JBL P81/P941 In-Wall Loudspeaker owner’s manual for speaker placement considera- tions. Record exact measurements from the floor, ceiling and an adja- cent drywall section.

NOTE

The P81BB/P941BB Back Box elimi- nates sensitivity to placement consid- erations due to standing waves within the wall cavity, as described in the JBL P81/P941 In-Wall Loudspeaker owner’s manual.

2.Position the back box between two wall studs and into the wall cavity, as shown in Figure 4. The back box must be placed between standard 16-inch on-center stud spacing. If desired, the back box can be mounted upside down (large flange toward the floor) if you will be mounting the speaker close to the ceiling.

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Figure 5: Fasten Back Box to

Wall Studs

3.Firmly secure the back box into place using nails, as shown in Figure 5.

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