Bose 24643, 251B Owner's Manual
The Bose® 251TM Environmental Speakers
OwOOwner
Owner’ s Guide
October 30, 2001
AM250811_04_V.pdf
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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
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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
AM250811_04_V.pdf October 30, 2001 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
T ools requir ed
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⁄
inch (6,0 mm) diameter masonry bit can be used.
4
• Eye and ear protection
• Dust mask
CAUTION:
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.
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Failure to follow the instructions in this owner’s guide voids all warranties on your
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
AM250811_04_V.pdf October 30, 2001 5
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