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: Dealer name: Dealer phone: Purchase date: We suggest you keep your sales slip and warranty card together with this owner's guide. and 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 Nic Merks Vice President Europe Manufacturer's authorized EU representative 2 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 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. 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 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 1/4 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. 4 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 recommendations" 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 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: 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 5 Installing Your 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: If you do not use the supplied brackets, choose a level surface for the speakers. 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 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 251TM 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. 3 B. /32 inch (2.25 mm) 1 1/2 inch (2.25 mm) 1 /4 inch (6.35 mm) 1 1/2 inch (2.25 mm) 3 /32 inch (2.25 mm) 1 1/2 inch (2.25 mm) 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 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 7 Installing Your 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 Your 251TM Speakers Figure 11 Installing the knobs two full rotations Figure 12 Sliding the speakers into the brackets 8 Installing Your 251TM 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 A. 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 1 /2 inch (1.3 cm) At the ends of each cord, strip approximately 1/2 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 9 Installing Your 251TM 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 amplifi ...