Bose Speaker 24643 User Manual

®
TM  
The Bose 251 Environmental Speakers  
OwOOwner  
Owner’s Guide  
October 30, 2001  
AM250811_04_V.pdf  
ltkje  
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Contents  
Where to find…  
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  
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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 environ-  
mental 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 speak-  
ers if any part of them appears damaged. Instead, notify Bose Corporation or your autho-  
rized Bose dealer immediately.  
WARNING: To avoid danger of suffocation, keep the plastic bags out of the reach of  
children.  
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  
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 332 inch diameter (2,5 mm) bit is preferred, or you can use a 18 inch diameter (3,0 mm)  
bit. For concrete, a 14 inch (6,0 mm) diameter masonry bit can be used.  
• Eye and ear protection  
• Dust mask  
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.  
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Setting Up  
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: Do not mount on surfaces that are not sturdy enough, or that have hazards  
concealed behind them, such as plumbing or electrical wire. If you are unsure about install-  
ing 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: This product is not intended for use in areas where it will be subject to high vibration.  
If you are unsure about installing these speakers, contact a qualified professional installer.  
Figure 2  
Speaker placement guidelines  
7 ft (2 m)  
minimum space between  
speakers  
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Installing Your 251 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 recom-  
mendations” 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: If you do not use the supplied brackets, choose a level surface for the speak-  
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 332 inch (2,5 mm) drill bit (Figure 5). For  
cement, drill four starter holes using a 14 inch (6,0 mm) drill bit (Figure 5).  
Figure 3  
251 environmental speaker  
mounted onto the exterior of a  
house  
Figure 4  
Marking four holes on the  
exterior of a house  
Figure 5  
Drilling four holes on the  
exterior of a house  
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Installing Your 251 Speakers  
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).  
Figures 6A and 6B  
A.  
B.  
Installing the hardware  
A. Wood  
B. Concrete  
3
14 inch (6.35 mm)  
1 12 inch (2.25 mm)  
32 inch (2.25 mm)  
1 12 inch (2.25 mm)  
3
14 inch (6.35 mm)  
1 12 inch (2.25 mm)  
32 inch (2.25 mm)  
1 12 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 332 inch (2,5 mm) drill bit (Figure 9).  
Figure 7  
251 environmental speaker  
mounted onto a deck railing or  
t
Figure 8  
Marking four holes on a deck  
railing or table  
Figure 9  
Drilling four holes on a deck  
railing or table  
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Installing Your 251 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 Your 251 Speakers  
Figure 11  
Installing the knobs  
two full rotations  
Figure 12  
Sliding the speakers into the  
brackets  
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Installing Your 251 Speakers  
Attaching the speakers to the brackets (cont.)  
B.  
Figures 13A and 13B  
A.  
Temporarily tighten the  
speakers to the brackets  
A. Exterior of the house  
B. Deck railing or table  
Making the connections  
Preparing the speaker wire (not provided)  
Speaker cord consists of two insulated wires. The insulation around one wire is striped,  
collared, or ribbed. This marked wire is positive (+). The plain wire is negative (–). These  
correspond to the red (+) and black (–) terminals on the back of the speaker, receiver, or  
amplifier. Be sure to connect each wire to the proper terminal (positive to positive, negative  
to negative).  
Figure 14  
Preparing the ends of each  
wire  
12 inch (1.3 cm)  
At the ends of each cord, strip approximately 12 inch (1.3 cm) of insulation from both wires  
(Figure 14). Next, twist the ends of each wire so there are no loose strands.  
Connecting the speaker wire to the speakers  
At the back of your speaker, unscrew the hex knobs on the terminal posts. This reveals a  
small opening through each post (Figure 15). Using the wire guides, insert the marked wire  
into the red (+) terminal. Then insert the plain wire into the black (–) terminal. Tighten the  
knobs to secure the wires. See Figures 16A and 16B on page 10.  
Figures 15  
Unscrewing the hex knob  
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Installing Your 251 Speakers  
Attaching the speakers to the brackets (cont.)  
A.  
B.  
Figures 16A & 16B  
Connecting the speaker wire  
A. Exterior of a house  
B. Deck railing or table  
Connecting the speaker wire to the receiver or amplifier  
1. Connect the speakers on the left side of the listening area to the left channel of your  
receiver or amplifier (Figure 17).  
a. Attach the marked wire to the red (+) terminal.  
b. Attach the plain wire to the black (–) terminal.  
2. Connect the speaker on the right side of the listening area to the right channel of your  
receiver or amplifier, following the same procedure above (Figure 17).  
Note: If your 251TM speakers are being connected as a secondary set of speakers to your  
receiver or amplifier, be sure to make the appropriate connections to the “B” channel.  
Figure 17  
Connecting the speaker wire  
Checking the connections  
Check the speaker connections carefully. Make sure no loose strands of wire touch across  
terminals. This could create short circuits that can damage an amplifier or receiver.  
Tighten any loose connections before you plug in the receiver or amplifier.  
Testing the connections  
To make sure your speakers operate correctly, follow these steps:  
1. Set the balance control on your receiver or amplifier to normal (centered).  
2. Play some deep bass passages of music through the speakers.  
The sound should seem to come from a point between the two speakers. The bass should  
be full and natural. If not, your connections may be reversed, causing the speakers to play  
out of phase. Refer to “Making the connections” on page 9. To correct the problem, make  
sure all the wires are connected positive to positive (+ to +) and negative to negative (– to –).  
Then repeat steps 1 and 2 to re-test the speakers.  
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Installing Your 251 Speakers  
Making the connections (cont.)  
Putting the speakers in the final location  
Loosen the knobs on each speaker to rotate the speakers into the desired position. Then,  
tighten the knobs to secure the speaker in its final position (Figures 18A and 18B).  
A.  
Figures 18A and 18B  
B.  
Putting the speaker in the final  
position  
A. Exterior of the house  
B. Deck railing or table  
Attaching the rubber feet  
If you do not plan to use the supplied brackets to mount your 251 environmental speakers,  
you can place them on a sturdy, level surface. They should be standing in the vertical posi-  
tion. Be sure to attach the rubber feet before using your speakers. For proper balance be sure  
to place the feet in the position shown in Figure 19.  
Figure 19  
Attaching the rubber feet  
Rotating the Bose logo  
Mounting the speakers on a deck railing or table will require you to rotate the Bose logo.  
Using your fingers, gently lift the logo, taking care not to detach it from the speaker, about 14  
inch (.24 cm) and turn it 180º.  
Figure 20  
Rotating the Bose logo  
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Maintaining Your 251 Speakers  
Troubleshooting  
Problem  
What to do  
Neither speaker plays  
• Check the settings on your receiver or amplifier. Refer to the owner’s guide that came with  
it for instruction on settings.  
• If your 251TM speakers are connected as a second set of speakers to your receiver or  
amplifier, check that the connections have been made to the “B” terminals and that  
the “B” speakers are selected to play.  
The bass or treble is weak  
Only one speaker plays  
• Check the tonal balance setting on your receiver or amplifier.  
• Check the balance control on your receiver or amplifier and make sure it’s centered.  
• Check the wires connected to the speaker that does not play. Make sure the wires are in  
good condition and are firmly connected. Review the “Making the connections” section on  
page 9.  
Only one speaker still plays  
• Disconnect the working speaker from the receiver or amplifier.  
• Switch the cord of the “faulty” speaker from its original receiver or amplifier jacks to the  
other set of jacks (the working speaker was originally attached to those jacks).  
- If the speaker now works, the problem is in your receiver or amplifier. Reconnect your  
speakers to a working unit.  
- If there is still no sound from the speaker, continue below.  
• Remove the cord from the working speaker and connect it to the “faulty” speaker.  
- If the speaker now works, the problem was in the original speaker cord.  
- If there is still no sound, the problem is in the speaker.  
• If trouble persists, contact your authorized Bose® dealer, who will arrange for service. Or,  
contact Bose customer service. See the inside back cover of this owner’s guide for a list of  
phone numbers.  
Warranty period  
Bose 251 environmental speakers are covered by a limited five-year transferable warranty.  
Details of coverage are on the warranty card that came with your speakers. Please fill out the  
information section, detach, and mail it to Bose.  
Customer service  
For additional help in solving problems, contact Bose Customer Service. See the inside back  
cover for offices and phone numbers.  
Cleaning your speakers  
Use a cloth dampened in mild detergent and water to remove dust or dirt from the outside of  
your 251 speakers. Or use a hose to rinse them thoroughly with fresh water. Do not use  
enough pressure to force water behind the grille and into the drivers or the acoustic ports.  
Protecting the speaker wire  
The bare ends of the speaker cord can be affected by exposure to the elements. This is  
especially true of saltwater exposure. You may use a silicone caulking material, such as RTV  
adhesive, to protect the connections. It is commonly available at hardware stores. If you do  
use caulking, apply it only after the wires are connected and the knobs tightened down.  
Check the connections annually, and reapply as needed.  
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Product Information  
Technical Information  
Protective features  
• Galvanized powder coated steel grille  
• Environmentally resistant hardware  
• Polymer fiber composite drivers  
• Nickel-plated brass connection terminals  
• Syncom® computer quality control  
Driver complement  
Two (2) 212" environmental TwiddlerTM drivers per speaker  
• One (1) 514" environmental woofer per speaker  
Enclosure  
• Dual-port molded polypropylene composite  
• Black or white  
Dimensions  
• 1312" H x 534" W x 8" D (34.29 cm x 14.6 cm x 20.32 cm)  
Compatibility  
• Compatible with amplifiers or receivers rated 10-200 watts per channel/rated 4 to 8 ohms  
• 100W IEC continuous power handling; rated 6 ohms  
Environmental Capabilities  
• Designed to withstand:  
– salt fog, sun, high humidity (100%RH)  
– temperature extremes (-40°F to 158°F; -40°C to 70°C)  
Wire recommendations  
• Based on a maximum frequency response deviation of ±0.5 dB  
Gauge  
Length  
18 (0.75 mm2)  
16 (1.5 mm2)  
14 (2.0 mm2)  
30 ft (9 m) maximum  
45 ft (14 m) maximum  
70 ft (21 m) maximum  
Weight  
• 8 lb (3.63 kg) each  
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®
Bose Corporation  
USA  
Italia  
BoseCorporation, TheMountain  
Bose S.p.A., V ia della Magliana 876  
Framingham, MA 01701-9168  
1-800-367-4008  
00148Roma  
www .bose.iT  
Phonehours-ET(easterntime):  
Weekdays8:30a.m. to8p.m.  
Saturdays9a.m. to3p.m.  
TEL 06-65670802  
FAX 06-65680167  
Japan  
Bose K.K., Shibuya YT Building  
28-3Maruyama-cho  
Canada  
BoseLtd., 1-35EastBeaverCreekRoad  
Richmond Hill, Ontario L4B 1B3  
1-800-465-2673  
Shibuya-ku, T okyo 150  
TEL 3-5489-0955  
FAX 3-5489-0592  
Phonehours-ET(easterntime):  
Weekdays9a.m. to5p.m.  
Nederland  
Bose B.V ., Nijver heidstraat 8  
1135GEEdam  
European Office  
TEL 0299-390111  
FAX 0299-390109  
BosePr oductsB.V ., Nijver heidstraat8  
1135GEEdam, Nederland  
Norge  
TEL 0299-390111  
FAX 0299-390114  
BoseA/S,Solheimsgate11  
N-2001, Lillestrøm  
TEL 63-817380  
Australia  
FAX 63-810819  
Bose Pty Limited, 1 Sorrell Street  
Par ramattaNSW , 2150  
Österreich  
TEL 02 9204-6111  
FAX 02 9204-6122  
BoseGes.m.b.H.,V iennaBusinessParkW  
(10.OG)  
ienerber gstrasse7  
Belgique/België  
A-1100 V ienna  
TEL 01-60404340  
Bose N.V ., Limesweg 2, B-3700 T onger en  
FAX 01-604043423  
TEL 012-390800  
FAX 012-390840  
Schweiz  
Danmark  
BoseAG,Rünenber gerstrasse13  
4460-Gelterkinden  
Bose A/S, Industrivej 7, 2605 Brøndby  
TEL 4343-7777  
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TEL 061-9815544  
FAX 061-9815502  
Deutschland  
Sverige  
BoseGmbH, Max-Planck-Straße36d  
D-61381 Friedrichsdorf  
BoseA/S,Johannefr edsgatan4  
S-43153 Mölndal  
TEL 06172-71040  
FAX 06172-710419  
TEL 31-878850  
FAX 31-274891  
France  
United Kingdom  
Bose S.A., 6, r ue Saint V incent  
78100 Saint Germain en Laye  
BoseLimited  
1AmbleyGr een  
TEL 01-30616363  
FAX 01-30614105  
GillinghamBusinessPark  
Gillingham, Kent ME8 ONJ  
TEL 0870-741-4500  
FAX 0870-741-4545  
India  
BoseCorporationIndiaPrivateLimited  
W-16, Gr eater Kailash-II  
New Delhi 110 048  
From other locations  
BoseCustomerSer vice, 1NewY orkA ve.  
Framingham, MA 01701-9168 USA  
TEL (011) 648 4462  
FAX (011) 648 4463  
TEL (508) 766-1900  
FAX (508) 766-1919  
Ireland  
World Wide Web  
BoseCorporation  
Carrickmacross,CoMonaghan  
TEL (042) 9661988  
www .bose.com  
FAX (042) 9661998  
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© 2000 Bose Corporation, The Mountain  
Framingham, MA 01701-9168 USA  
250811 AM Rev.04 JN10679  
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