Subwoofer (120-1726) Installation Faxback Doc. # 7260 Mounting the Subwoofer Follow these steps to mount the subwoofer in your vehicle. 1. Select a flat surface in the vehicle. If you mount the subwoofer in a hatchback, pickup truck, van, or similar vehicle, position the subwoofer so its grille points into a back corner of the mounting area at least 4 inches from the sides of the vehicle. Note: You can also place the subwoofer on your vehicle's floorboard. 2. Check the underside of the selected mounting surface for objects such as fuel lines or electrical connections. If there are obstructions under the mounting surface, either move them or choose another mounting location. 3. Use the two supplied brackets as templates to drill mounting holes. Make sure the mounting surface is relatively flat. 4. Space the brackets approximately 14 7/8 inches apart. Mark off the four holes used to secure the bracket. Drill the four holes using a 1/8-inch drill bit. 5. Use the four supplied sheet metal screws to hold the brackets in place with the bracket tongs facing forward. Do not over tighten the screws as the brackets may bend out of shape. 6. Separate the hook and loop fastener strip into two halves. Peel off the protective paper. Firmly press one half of the hook and loop fastener strip onto the bracket used to secure the speaker's back panel. 7. Press the matching half of the hook and loop fastener onto the flat section of the back panel. 8. To mount the subwoofer, place it over the brackets at a slight angle. Place the back edge of the grille over the bracket tongs. Push in the grille to engage it into the raised tongs. Then press the back panel over the bracket with the hook and loop fastener. The subwoofer should now be firmly secured to the brackets. The subwoofer can be removed as needed by pushing up on the hook and loop fastener side and pushing forward to disengage it from the bracket tongs. Note: If you mount the subwoofer in an airtight trunk, you might limit the subwoofer';s performance by preventing the subwoofer's sound from reaching the inside of the vehicle. Connecting the Power Source Car audio sources, such as radio/cassette players, are either low-power (about 5 watts per channel) or high-power (about 20 watts per channel). You can use your subwoofer with either type to audio source. Please note the power/audio leads are connected to the subwoofer with separable connecting plugs. After you make all connections, make sure the plugs are firmly pushed together. The plugs only go together in one way. 1. Find the wire that connects the audio source's right channel to the right speaker's positive (+) terminal. Then carefully cut away about 1/2 inch of the insulation (without cutting any wires) at any point on the wire. 2. Connect the subwoofer's gray wire to the exposed wire. Then wrap electrical tape around the connection to secure any loose wires. 3. Find the wire that connects the audio source's left channel to the left speaker's positive (+) terminal. Then cut away about 1/2 inch of the wire's insulation. 4. Connect the subwoofer's green wire to the exposed wire. Then wrap electrical tape around the connection to secure any loose wires. 5. Push together the modular plugs to connect the subwoofer. Notes: Be sure you do not connect the subwoofer to a negative (-) speaker terminal. Doing so prevents any sound from coming from the subwoofer. If you have a soldering iron, you can also connect the subwoofer's wires directly to the speaker's positive terminals. This ensures a secure connection. Connecting the Subwoofer to the Subwoofer Switch The supplied subwoofer switch lets you turn the subwoofer on or off. If you want to connect the subwoofer without the switch, proceed to "Connecting the Subwoofer Without the Switch." Follow these steps to connect the subwoofer switch: 1. Connect the subwoofer's black ground wire (with the female terminal connector) to Post 1 on the switch. 2. Connect the switch's ground wire extension (attached to the main ground wire) to the battery's negative terminal or to a metal bolt attached to the vehicle's chassis. 3. Connect the subwoofer's red wire to Post 2 on the switch. 4. Connect the female terminal end of the supplied separate red wire to Post 3 on the switch. 5. Connect the other end of a separate red wire to an accessory terminal in the fusebox or directly to the battery's positive (+) terminal. Notes: If you connect the separate red wire to the vehicle's accessory terminal, the subwoofer turns on with the ignition if you set the switch to ON. If you connect the separate red wire to the vehicle's accessory terminal, be sure the terminal can provide at least 5 amps. Mounting the Subwoofer Switch We suggest you mount the subwoofer switch at a locations that lets you easily reach the switch without interfering with your driving (under the dash, for example). 1. Select a mounting location where there are no obstruction (such as electrical wiring) on the other side of the mounting surface. 2. Use the switch as a template to mark two mounting holes on the mounting location. 3. Use a 7/64-inch drill bit to drill a starter hole on each mark. 4. Attach the switch to the mounting location using the supplied screws. Connecting the Subwoofer Without the Switch 1. Connect the subwoofer's red wire to the accessory terminal in your vehicle's fuse box. Note: If the wire's female terminal connector does not fit the terminal, cut off the connector. Then attach the wire as needed. 2. Cut off the ground wire extension or secure it to the main ground wire with electrical tape. Then connect the main ground wire (with the female terminal connector) to the vehicle battery's negative (-) terminal or a metal bolt attached to the vehicle's chassis Note: If necessary, cut off the female terminal connector. Then connect the ground wire as needed. Adding Another Subwoofer You can add another subwoofer to your audio system for even more bass. Notes: You an add up to four subwoofer's to your audio system. For the best sound, set both subwoofer's BASS LEVEL controls to about the same level. This helps ensure more balanced sound output and prevents any particular subwoofer from being overloaded. Using the Subwoofer To blend the subwoofer's sound with that of your existing speakers, turn up the volume of the music source slightly above normal listening level. Then adjust the BASS LEVEL control on the subwoofer as desired. Notes: If the audio source has a bass control, keep it in the center (flat) position for the best overall sound. A bass setting above the center position might distort the subwoofer's sound. If a short circuit occurs, the subwoofer's in-line fuse might blow. If this happens, replace the fuse with an identical 5-amp, 250-volt, standard-blow fuse. Using the Crossover Switch The subwoofer has a two-position switch that lets you select from two crossover frequencies - 1220 HS and 250 HS. Select the crossover frequency that blends in best with the existing speakers in the system. (br/all-8/3/94)