JBL INSTALLATION P941BB - Manual (Page 5)

Figure 3: P81BB/P941BB
Back Box Depth
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.
.
Figure 4: Place the Back Box
Between Wall Studs
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.
Figure 5: Fasten Back Box to
Wall Studs
3. Firmly secure the back box into place
using nails, as shown in Figure 5.
TOP
TOP
3.375 inches
(85.7mm)
Rear Front
5
TO INSTALL THE
BACK BOX
P81BB, P941BB OM 11/16/05 3:04 PM Page 5