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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 %2 inch (2,5 mm) drill bit (Figure 5). For cement, drill four starter holes using a V4 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 6 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 Installing the hardware A. Wood B. Concrete A. B. 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 %2 inch (2.25 mm) 1 1/2 inch (2.25 mm) 3/32 inch (2.25 m im)__ h (2.2. 1 V2 inch (2.25 mm) 1/4 inch (6.35 mm) ■ ■ 1 V2 inch (2.25 mm) V4 inch (6.35 mm) ■■■ v 1 V2 inch (2.25 mm) Installing the brackets onto a deck railing or table The 251™ 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 %2 inch (2,5 mm) drill bit (Figure 9). Drilling four holes on a deck railing or table 7 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). Note: If you are mounting your 251™ 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). Figure 12 Sliding the speakers into the brackets I 8 Installing Your 251™ Speakers Attaching the speakers to the brackets (cont.) Figures 13A and 13B Temporarily tighten the speakers to the brackets A Exterior of the house B. Deck railing or table B. 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 At the ends of each cord, strip approximately !4 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. 9 Installing Your 251™ Speakers Attaching the speakers to the brackets (cont.) Figures 16A & 16B Connecting the speaker wire A. Exterior of a house B. Deck railing or table B. 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 251™ speakers are being connected as a ...

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