JBL INSTALLATION P81BB User manual

JBL PERFORMANCE
™
SERIES
INSTALLATION INSTRUCTIONS
P81BB
P941BB
BACK BOXES FOR P81
AND P941 LOUDSPEAKERS
P81BB, P941BB OM 11/16/05 3:04 PM Page 1

This document contains general
installation instructions for the JBL®
Performance™Series P81BB and
P941BB Back Boxes. It is important to
read this document before attempting
to use this product. Pay particular
attention to safety instructions.
WARNING
Calls attention to a procedure, practice,
condition or the like that, if not correctly
performed or adhered to, could result
in injury or death.
CAUTION
Calls attention to a procedure, practice,
condition or the like that, if not correctly
performed or adhered to, could result
in damage to, or destruction of, part or
all of the product.
NOTE
Calls attention to information that is
essential to highlight.
2 Documentation Conventions
3 Important Safety Instructions
4 About the Back Box
4 Installation Instructions
7P81BB/P941BB Back Box Outer Dimensions
7 Obtaining Service
P81BB/P941BB
BACK BOXES FOR P81 AND P941
LOUDSPEAKERS
DOCUMENTATION
CONVENTIONS
®
2
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3
IMPORTANT SAFETY
INSTRUCTIONS
Read before starting installation:
•Product contains fiberglass wool.
•Disturbing the insulation in this
product during installation, main-
tenance, or repair will expose you
tofiberglass wool. Breathing this
may cause lung cancer. Fiber-
glass wool is known to the state
of California to cause cancer.
•Fiberglass wool may also cause
respiratory, skin and eye irritation.
•To reduce exposure to this sub-
stance or for further information,
consult material safety data
sheets available from the address
shown below, or contact your
supervisor.
JBL Consumer Products
250 Crossways Park Drive
Woodbury, New York 11797 USA
WARNING
This enclosure is not listed for use
in air-handling plenums. Installation
of this enclosure in walls or ceil-
ings of fire-barrier-rated construc-
tion requires that construction
methods shall be employed in order
tocomply with local building or life
safety codes. Consult your local
authority having jurisdiction (build-
ing, electrical or fire safety inspec-
tor) to determine what acceptable
construction methods will be
required.
WARNING
The P81BB In-Wall Back Box
weighs 19 lb (8.6kg) empty, and
32 lb (14.52kg) with a P81 speaker
system installed in it. The P941BB
In-Wall Back Box weighs 19 lb
(8.6kg) empty, and 36 lb (16.3kg)
with a P941 speaker system
installed in it.
ANSI/EIA 636 Recommended
Loudspeaker Safety Practices,
Section 16.3, recommends that the
mounting system used to install the
In-Wall Back Box in walls or ceil-
ings should support the weight of
the product plus at least four times
the weight of the product being
installed. That means, for a P941
installed in an In-Wall Back Box,
the mounting system should be
able to support at least 163 lb
(74kg).
It is strongly recommended that the
installer consult a construction pro-
fessional or a professional engi-
neer to determine the appropriate
mounting methods to be used for
each specific installation location.
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4
ABOUT THE
BACK BOX
Thank you for purchasing the JBL
Performance P81BB/P941BB Back
Boxes, which are optional rear enclo-
sures for the JBL P81 and P941 In-Wall
Loudspeakers. The P81BB/P941BB
Back Boxes which provide optimal vol-
ume for woofer alignment and reduce
acoustic bleed-through to rooms
adjacent to your listening area. The
P81BB/P941BB Back Boxes also func-
tion as mounting brackets designed
tofacilitate the installation of the
P81/P941 in-wall loudspeakers in new
construction or major retro-fit installa-
tions. The back boxes improve sonic
performance while providing solid sup-
port for the speaker mounting frame
and baffle assembly. Since the back
box is installed before the drywall is
mounted, it allows the speakers to be
mounted in a clean, efficient manner.
The JBL P81BB/P941BB Back Box
measures 17-1/2 inches x 28-5/8 inches
(445mm x 727mm) (including the
flanges). The back box is designed
to mount between two 2x4-inch (or
2x6-inch) wall studs on 16-inch centers.
See Figures 1 and 2 for inner dimen-
sions of the P81BB and P941BB.
The following items are required for
installation:
•tape measure
•carpenter’s level
•pencil
•hammer
•nails
•drywall section
•drywall screws
•staples/U nails
•utility knife
•service wire (included)
•work gloves
•face mask
CAUTION
The back box should be installed by a
professional. Installers must adhere to
local building codes to ensure proper
installation. JBL is not responsible for
any injury or damage caused by
improper installation.
Figure 2: P941BB Back Box Height and Width
19.22 inches
(488.2mm)
12.50 inches
(317.5mm)
28.62 inches
(727mm)
17.50 inches
(444.5mm)
13.57 inches
(344.7mm)
21.16 inches
(537.5mm)
INSTALLATION
INSTRUCTIONS
14.84 inches
(376.9mm)
10.65 inches
(270.5mm)
17.50 inches
(444.5mm)
13.57 inches
(344.7mm)
16.78 inches
(426.2mm)
28.62 inches
(727mm)
Place side flange
on top of stud This flange fits in between wall studs
In-wall fits here
Figure 1: P81BB Back Box Height and Width
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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
TOINSTALL THE
BACK BOX
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CAUTION
Installers must adhere to local building
codes to ensure proper installation.
JBL is not responsible for any possible
damage caused by improper installation.
4.Feed the power amplifier wires from
the wall cavity down through the
cable clamp located on top of the
enclosure. Pull approximately two
feet of wire through the clamp to
create a generous service loop
inside the enclosure for ease of
hookup, as shown in Figure 6.
Figure 6: Amplifier Connections
5. Tighten the clamp screws, cinching
the wires in place
.
CAUTION
Be sure to comply with local wiring
codes. JBL is not responsible for any
damage or injuries that may result from
faulty wiring.
6. Place the section of drywall over
the back box. With tape measure
and pencil, carefully measure and
mark where to position the wall
template (included with the loud-
speaker) by using the measure-
ments recorded in Step 1.
7. Use the wall template to trace
where to cut the drywall.
8. Cut a small hole in the center of the
template area to make sure the
template is in the right location.
9. After confirming the correct loca-
tion, cut the template hole opening,
asshown in Figure 7. Use a carpen-
ter’s level to ensure the opening is
level.
Figure 7: Cut Opening in Drywall
10. Fasten the drywall to the wall studs
using drywall screws.
11. Install the speaker mounting frame
into the wall opening. Refer to the
JBL P81/P941 In-Wall Loudspeaker
owner’s manual for complete
instructions.
12. Route wires to the top of the
speaker frame to prepare for
hookup.
Figure 8: Route Wires to Top of the
Loudspeaker
In-Wall Speaker Frame
Route Wires to the Top
of the Speaker System
Avoid Contact Between
the Wires and Speaker Cone
Back Box
Cable Clamp
+
–
Binding Posts
Power Amplifier
6
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7
Exposed Binding Post
Make Connections
Observing Proper Polarity
In-Wall Speaker Rear
Binding Posts
ABC
Insert Stripped Wires
Into Exposed Holes
Terminal Connectors
13. Locate the loudspeaker’s binding
posts, as shown in illustration A
of Figure 9. From the top of the
speaker, run the wires down to
the loudspeaker’s binding posts,
as shown in illustrations B and C.
14. Loosen the terminal connectors by
hand (counterclockwise) on the
binding posts until the holes in their
threaded posts are visible. Insert
the wires from the top, as shown in
illustration B in Figure 9.
NOTE
Make all connections observing the
proper polarity, positive to positive (+)
and negative to negative (–).
15. Retighten the terminal connectors
by hand to ensure a secure con-
nection.
16. Refer to the JBL P81/P941 In-Wall
Loudspeaker owner’smanual for
complete instructions on installing
the speaker baffle to complete the
installation.
P81BB/P941BB
BACK BOX OUTER
DIMENSIONS
Width 17-1/2 inches (445mm)
Height 28-5/8 inches (727mm)
Depth 3-3/8 inches (86mm)
OBTAINING SERVICE
Before returning a product for warranty
or nonwarranty service, contact JBL
Customer Support to determine the
extent of the problem and to obtain a
Return Authorization (RA) number. No
products will be accepted without an
RA number issued from JBL.
If a JBL product must be returned for
repair, JBL will assume no responsibility
for the product during shipping from
the customer to JBL, whether the prod-
uct is or is not covered under warranty.
All Returns Must Be:
•well-packaged using the original
packing materials (if possible)
•properly insured and consigned
•prepaid to a reliable shipping agent
The following information must be
included when a product is returned for
service:
•Name
•Company name
•Street address, city, state and zip
code
•Telephone number, including area
code and country code (if applicable)
•Product serial number
•Adetailed description of the problem
•The preferred method of return
shipment
•RA number clearly marked on both
the inside and outside of the package
To Contact JBL Customer Support:
Call 516.255.4JBL or visit www.jbl.com.
Figure 9: Speaker Connections
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JBL Consumer Products
250 Crossways Park Drive
Woodbury, New York 11797 USA
www.jbl.com
©2005 Harman International Industries,
Incorporated. All rights reserved.
Part No. 360863-001 11/05
®
All features and specifications are subject to change without notice.
JBL and Harman International are trademarks of Harman International
Industries, Incorporated, registered in the United States and/or other
countries. Performance is a trademark of Harman International Industries,
Incorporated.
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