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Installing Your 251
TM
Speakers
Installing the mounting brackets
The 251
TM
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
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 4
Marking four holes on the
exterior of a house
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).
Figure 5
Drilling four holes on the
exterior of a house
Figure 3
251 environmental speaker
mounted onto the exterior of a
house
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