VIRTUALLY INVISIBLE® 791 SPEAKERS
Installation Guide
Installationsvejledning
Installationsanleitung
Guía de instalación
Asennusopas
Notice d’installation
Telepítési útmutató
Guida di installazione
Gebruikershandleiding
Podręcznik instalacji
Installationsanvisning
EnglishTAB 6TAB 8 TAB 7 TAB 3TAB 5 TAB 2TAB 4
SAFETY INFORMATION
Important words of caution
Please read this owner’s guide completely before you start.
Then carefully consider your experience using the tools and
taking the precautions referred to here.
If you have doubts about doing this installation, you should
contact either the dealer you purchased the product from, an
electrician, or a professional audio/video installer. You can
describe the job and request a cost estimate before committing
to installation service.
WARNING: Installation shall be in accordance with the applicable
section of the National Electrical Code, ANSI/NFPA 70, and/or the
National Fire Alarm Code, ANSI/NFPA 72, as applicable. The wiring
method and compartment shall be such as not to interfere with the
operation of the speaker.
CAUTIONS:
• Failure to follow the instructions in this owner’s guide voids all
warranties on your speakers.
• These speakers are not designed or recommended for
installation in walls, in ceilings of masonry, or in drop ceilings.
• This product is not intended for use in Air-Handling Plenum
Spaces.
• Consult local building codes before you get started with this
installation.
• See product enclosures for safety-related markings.
• Make no modifications to the speakers or accessories.
Unauthorized alterations may compromise safety, regulatory
compliance, and system performance.
• Be sure to keep all insulation away from speakers in
accordance with the installation instructions in this guide.
OVERVIEW
Basic steps to installation
The instructions on the pages that follow will help you
complete each of the steps below.
Step 1:
Choose approximate locations for each
speaker.
Step 2:
Observe the cautions and use the template
for precise placement.
Step 3:
Cut the hole for each speaker.
Step 4:
Wire each speaker.
Step 5:
Insert and secure each speaker in the ceiling.
Step 6:
Test each speaker to make sure it works.
Mount these speakers in wood frame or
similar construction only
Each speaker requires a round space of 85/8 in. (21.9 cm)
diameter, plus a minimum of 4
wallboard that is a maximum of 1
Bose recommends installing these speakers only in wood frame
or similar ceiling construction with adequately spaced studs, as
found in 2 x 6 construction. These installation guide instructions
are specific to this type of installation only.
1
/
in. (10.5 cm) of depth behind
8
1
/4 in. (3.2 cm) thick.
Important safety instructions
1. Read these instructions – for all components before using
this product.
2. Keep these instructions – for future reference.
3. Heed all warnings – on the product and in the owner’s
guide.
4. Follow all instructions.
5. Install in accordance with the manufacturer’s instructions.
6. Only use attachments/accessories specified by the
manufacturer.
For your records
Serial numbers are located behind the rim of your Virtually
Invisible
Serial numbers: _____________________ ____________________
Serial numbers: _____________________ ____________________
Serial numbers: _____________________ ____________________
Dealer name: ___________________________________________
Dealer phone: ___________________________________________
Purchase date: ___________________________________________
We suggest you keep your sales receipt and warranty card
together with this owner’s guide.
®
791 speakers.
VIRTUALLY INVISIBLE is a registered trademark of Bose
Corporation in the U.S. and other countries.
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Speakers
Template/Paint shield
Speaker grilles
Speaker cable
Spade
drill bit
Phillips-head
screwdriver
Sharp pencil
Cutting tool*
Protective eyewear
Painter’s tape**
Wire cutter/stripper
Tape m eas u re
Power drill
Stud finder
PREPARATION
Before you begin...
Thank you for choosing Bose® Virtually Invisible® 791
speakers for in-ceiling installation. These top-of-the-line
Virtually Invisible
mance for stereo and home theater enjoyment. Their
slim profile blends well into your room, so only the
sound...not the speakers...stands out.
Please be sure to read this guide carefully before you do
any cutting. There are many factors to consider before
proceeding with this type of installation.
Unpacking
Carefully unpack the speakers. Check to be sure the
carton includes all the parts shown.
®
speakers provide superior perfor-
Other equipment you will need
Hardware for securing the speaker to your ceiling is
attached to the speaker. In addition, you need a ladder
and the equipment below to make the installation go
smoothly.
If any part of the speaker pair appears damaged, do
not use it. Notify Bose or your authorized Bose dealer
immediately. For Bose contact information, refer to
the address list included in the carton.
Note: With the speakers unpacked, you can find the serial
numbers on the back of each one. Then you can copy the
numbers onto your warranty card and in the “For your records”
space on page 2.
If painting is in your plan
You may want to complete that step before you begin
speaker installation. See “Painting the exterior parts” on
page 10 before you begin painting.
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PREPARATION
3'
(1 m)
3'
(1 m)
2' (.6 m)
2' (.6 m)
2' (.6 m)
2' (.6 m)
Front of your room
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
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Selecting speaker cable
If your cables are not yet installed, use these guidelines
for choosing and using speaker cable. If your cables are
already installed, check to be sure they meet these
standards.
Gauge Maximum Length
18 AWG (0.82 mm
16 AWG (1.3 mm
14 AWG (2.1 mm
12 AWG (3.3 mm
2
)
2
)
2
)
2
)
Consider the location of the speakers and be sure to
allow enough cable to reach each one. This includes the
extra length needed for wiring the speaker before
inserting it into the ceiling.
Preparing the cable wires
Speaker cable consists of two insulated wires. The
insulation around one wire is marked (striped, collared,
or ribbed) to identify it as positive. The other wire is
negative.
Note: It is sometimes difficult to distinguish wire
markings. Inspect both wires carefully.
1
1. Strip approximately
both wires.
2. Twist the bare end of each wire so loose strands will
not touch across terminals.
Be sure to connect each wire to the proper speaker
terminal, positive to positive (+) and negative to
negative (–).
Note: For information on installing cable, consult a
professional electrician or audio/video installer, or look
for reference books at a local home building retail store.
/2 in. (13 mm) of insulation from
20 ft (6 m)
30 ft (9 m)
50 ft (15 m)
90 ft (27 m)
Placement guidelines
Orienting and placing these identical speakers is critical
to their performance. Follow these guidelines in
choosing the approximate location for each speaker.
Before you mark the location for the ceiling holes, be
sure to read:
• “Other considerations” on page 5, and
• “WARNINGS:” on page 6.
Using the arrow as a guide
There is a small arrow molded into the inside flange
of each speaker. Use it as a guide for orienting the
speakers relative to one another.
The diagrams that follow show the proper orientation
using a pair of speakers for stereo sound, or several
pairs of speakers for home theater sound.
Placing speakers for stereo sound
Position these two speakers:
– one on the left and one on the right at the front of
the room
– oriented with the arrow pointing to the opposite
speaker
– an equal distance from the primary listening area
– with each one AT LEAST:
- 2 ft (.6 m) from the front wall
- 3 ft (1 m) from the side walls
- 6 ft (2 m) apart
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