Bose 24643, 24644 User manual
This PDF includes both the English and
the French versions of this document.
Ce PDF inclut les versions anglaises
et françaises de ce document.
The Bose® 251TM Environmental Speakers
Owner’ s Guide
For your records…
Serial numbers are located on the label on the back of each 251TM environmental speaker.
Serial numbers: and
Dealer name:
Dealer phone: Purchase date:
We suggest you keep your sales slip and warranty card together with this owner’s guide.
DECLARATION OF CONFORMITY
We, the offerer:
Bose® Corporation, The Mountain, Framingham, MA 01701-9168 USA
acknowledge our sole responsibility, that the product:
Kind of equipment: Loudspeaker
Type designation: 251TM Environmental Speakers
in accordance with EMC Directive 89/336/EEC and Article 10(1) of the
Directive, is in compliance with the following norm(s) or document(s):
Technical regulations: EN50081-1, EN50082-1
Accredited by:
Bose Corporation, The Mountain, Framingham, MA 01701-9168 USA
15 Jan. 2000
Bose Products B.V.
Nijverheidstraat 8, 1135 GE Edam
The Netherlands
Manufacturer’s authorized EU
Nic Merks
Vice President Europe
representative
2
Where to find…
Contents
Setting Up
Before you begin ........................................................................................................... 4
Unpacking the carton ................................................................................................... 4
Tools required ............................................................................................................... 4
Selecting the location for your speakers ...................................................................... 5
Installing Your 251TM Speakers
Choosing the speaker wire ........................................................................................... 6
Installing the mounting brackets ................................................................................... 6
Attaching the speakers to the brackets ........................................................................ 8
Making the connections................................................................................................ 9
Maintaining Your 251TM Speakers
Troubleshooting .......................................................................................................... 12
Warranty period .......................................................................................................... 12
Customer service ........................................................................................................ 12
Cleaning your speakers .............................................................................................. 12
Protecting the speaker wire ........................................................................................ 12
Product Information
Technical information.................................................................................................. 13
Bose® Corporation ....................................................................................inside back cover
3
Setting Up
Before you begin…
Thank you for purchasing Bose® 251TM environmental speakers. These high-performance
outdoor speakers are engineered to provide sound quality far beyond that of other environmental speakers. The 251 environmental speakers are designed to withstand nature’s
elements – so you can be confident they will perform for years to come.
Unpacking the carton
Carefully unpack your speakers and save all packing materials for possible future use. Check
that your system contains the parts identified in Figure 1. Do not attempt to use your speakers if any part of them appears damaged. Instead, notify Bose Corporation or your authorized Bose dealer immediately.
Figure 1
Packaging contents:
• Two 251 speakers
• Two mounting brackets
• Mounting hardware (8 screws
and 8 plastic anchors)
• Six rubber feet
• Four knobs
• One owner's guide
Tools required
WARNING:
To avoid danger of suffocation, keep the plastic bags out of the reach of
children.
You need the following items to complete this installation:
• Speaker wire (see “Wire recommendations” on page 13)
• Phillips-head screwdriver (#2)
• A drill with the following bits:
- A 3⁄32 inch diameter (2,5 mm) bit is preferred, or you can use a 1⁄8 inch diameter (3,0 mm)
bit. For concrete, a 1⁄
• Eye and ear protection
• Dust mask
inch (6,0 mm) diameter masonry bit can be used.
4
CAUTION:
Failure to follow the instructions in this owner’s guide voids all warranties on your
speakers. If you are unsure of your ability to complete this process, consult a professional
installer. Please read this owner’s guide completely before beginning installation.
4
Selecting the location for your speakers
For best results, mount both speakers on the same wall, facing the listening area. Make sure
they do not face each other. (Outdoors, if you are not using an existing wall, consider the
length of your listening area as your “wall.”)
The 251TM speakers should be placed at least 7 feet (2 m) apart.
Please consider the following before mounting your speakers:
• Measure the length of speaker wire you need to connect each speaker to your receiver
or amplifier. To determine the wire gauge you will need, refer to the “Wire recom-
mendations” on page 13.
• It is important that the speaker wire not be tripped over, pinched, or pulled. Determine
the best route to protect the wire.
CAUTION:
concealed behind them, such as plumbing or electrical wire. If you are unsure about installing these speakers, contact a qualified professional installer.
• Regardless of where you place your speakers, make sure they cannot fall and cause
injuries.
• Bose® 251 speakers are not magnetically shielded. Keep them at least 9 inches (23 cm)
from any video screen or monitor.
Note:
If you are unsure about installing these speakers, contact a qualified professional installer.
Do not mount on surfaces that are not sturdy enough, or that have hazards
This product is not intended for use in areas where it will be subject to high vibration.
Setting Up
Figure 2
Speaker placement guidelines
7 ft (2 m)
minimum space between
speakers
5
Installing Y our 251TM Speakers
Choosing the speaker wire
Be sure to use the proper gauge (thickness) of speaker wire. Standard zip cord (2-conductor,
18-gauge wire found at electrical and hardware stores) works for most applications. If your
speakers will be more than 30 feet (9 m) from the receiver or amplifier, see the “Wire recommendations” under “Technical Information” on page 13. Or check with your authorized Bose
dealer.
If you decide to run the speaker wire through a wall or underground, check your local building
code requirements, or contact an electrical installer before proceeding.
Note:
Be sure to cut enough wire to reach from the receiver to each speaker.
®
CAUTION:
Before making any connections, turn off your receiver or amplifier and unplug it
from the outlet (the AC power mains).
Installing the mounting brackets
The 251TM speakers should be mounted using the supplied brackets. They can be mounted
onto the exterior of a house or onto a deck railing or table. If you choose not to use the
supplied brackets, be sure to position your 251 speakers on a sturdy surface.
CAUTION:
ers. Vibration can cause the speakers to move, so it is important that you install the supplied
rubber feet before using the speakers on a surface. Refer to “Attaching the rubber feet” on
page 11.
Installing the brackets onto the exterior of a house
The 251 speakers should be mounted in a vertical position to achieve the best musical
performance. Figure 3 illustrates how the mounted speaker will look once the installation is
complete. To begin, mark four holes to indicate where you want to install the speaker bracket
(Figure 4). For wood, drill four starter holes using a 3⁄32 inch (2,5 mm) drill bit (Figure 5). For
cement, drill four starter holes using a 1⁄4 inch (6,0 mm) drill bit (Figure 5).
Figure 3
251 environmental speaker
mounted onto the exterior of a
house
If you do not use the supplied brackets, choose a level surface for the speak-
Figure 4
Marking four holes on the
exterior of a house
Figure 5
Drilling four holes on the
exterior of a house
6
Installing the mounting brackets (cont.)
Installing the brackets onto the exterior of a house (cont.)
For mounting onto wood, install the supplied screws using a Phillips-head screwdriver (Figure
6A). For concrete use, first install the supplied plastic inserts. Then, using a Phillips-head
screwdriver, install the screws (Figure 6B).
Installing Y our 251
TM
Speakers
Figures 6A and 6B
Installing the hardware
A. Wood
B. Concrete
Figure 7
251 environmental speaker
mounted onto a deck railing or
t
A. B.
3
⁄32 inch (2.25 mm)
1
1
⁄2 inch (2.25 mm)
3
⁄32 inch (2.25 mm)
1
⁄2 inch (2.25 mm)
1
1
⁄4 inch (6.35 mm)
1
⁄2 inch (2.25 mm)
1
1
⁄4 inch (6.35 mm)
1 1⁄2 inch (2.25 mm)
Installing the brackets onto a deck railing or table
The 251TM speakers should be mounted in a vertical position to achieve the best musical
performance. Figure 7 illustrates how the mounted speaker will look once the installation is
complete. To begin, mark four holes to indicate where you want to install the speaker bracket
(Figure 8). Then, drill four starter holes using a 3⁄32 inch (2,5 mm) drill bit (Figure 9).
Figure 8
Marking four holes on a deck
railing or table
Figure 9
Drilling four holes on a deck
railing or table
7
Installing Y our 251TM Speakers
Installing the mounting brackets (cont.)
Installing the brackets onto a deck railing or table (cont.)
Finally, install the four screws using a Phillips-head screwdriver (Figure 10).
Figure 10
Installing the bracket onto a
deck railing or table
Note:
If you are mounting your 251TM speakers on a deck railing or table, you will need to
rotate the Bose logo. Refer to “Rotating the Bose logo” on page 11 for instructions on how to
do this.
Attaching the speakers to the brackets
Once the brackets are installed, carefully follow these steps to attach the speakers to the
brackets. First, insert the knobs into each side of the speakers. Be sure to turn each knob
two full rotations (Figure 11). Then, carefully slide the speakers into the brackets (Figure 12).
Finally, temporarily tighten the speaker in a position that will allow you to easily connect the
speaker wire (Figures 13A and 13B).
Installing Y our 251™ Speakers
Figure 11
Installing the knobs
Figure 12
Sliding the speakers into the
brackets
two full rotations
8
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