Boss Audio PH4000D User Manual in English - Page 4

3. Mark the location for the mounting hole screws by positioning the amplifier where you wish to install it. Use a scribe or mounting screw, inserted through each of the amp's mounting holes, to mark the mounting surface. If the mounting surface is carpeted, measure the hole centers and mark with a felt tip pen. 4. Drill pilot holes in the mounting surface for the mounting screws. Place the amplifier in position, and attach the amplifier to the mounting surface securely using screws. Connecting the amplifier Before doing any wiring, look through this manual and identify the diagrams to follow for power, input and speaker connections for your particular installation. Be sure you understand all the connections before you proceed. 1. Connect the amplifier's power ground terminal to the closest point on the chassis of the car. Keep this ground wire to less than 39" (100 cm) in length. Use 4 gauge (or heavier) wire. 2. Connect the remote terminal to the remote output of the head unit using 16 gauge (or heavier) wire. 3. Connect an empty fuse holder within 18" (45 cm) of the car battery, and run 4 gauge (or heavier) cable from this fuse to the amplifier location. The purpose of placing a fuse in this location is to protect your vehicle's battery in the event that this wire accidentally touches the chassis ground on its run to the amplifier. 4. Check that the fuse holder is empty. Then connect the fuse holder to the "BATT+" connection on the amplifier. 5. If multiple amplifiers are being used in your system, either: • Run a separate pair of cables from the battery and a chassis ground point to each amplifier. Each (+) cable must have its own inline fuse. -or• Run a #0 cable from the fuse holder at the battery to a distribution block at or near the amplifier's location. Then run separate cables from the amplifier to this distribution block and to independent chassis ground points. 6. Connect all line inputs and outputs (if used) using high-quality cables. Connect all speakers, following the diagrams in this manual. Be sure to observe proper polarity to avoid audio phase problems. 7. Insert fuse(s) into the battery fuse holder(s). 8. Recheck all connections before powering up the amplifier. 9. Set all level controls to minimum position, and set all crossover controls/switches to the desired frequency points. 10. Power up the head unit and the amplifier. Then set the volume control on the head unit to about 3/4 volume, and adjust the amplifier's input level control(s) to just below the level of distortion. 11. Further fine tuning of the various controls may be necessary to obtain best results. PH3000D/PH4000D/PH5000D Amplifier User's Manual - page 4