User manual ALPINE PDX-4 150

[. . . ] Using such parts could disable control of the vehicle and cause fire etc. Return it to your authorized Alpine dealer or the nearest Alpine Service Center for repairing. The wiring and installation of this unit requires special technical skill and experience. To ensure safety, always contact the dealer where you purchased this product to have the work done. [. . . ] Insert the four machine screws (M4 x 36, supplied) through the top of the second unit into the four joint caps of the lower unit to connect them together. Next, install the third unit as described for the second unit in B above. Before making connections, be sure to turn the power off to all audio components. Connect the yellow battery lead from the amp directly to the positive (+) terminal of the vehicle's battery. cAUTION Caution on connection terminals/parts · Do not allow other objects (particularly electrically conductive) to get too close or in contact with any of the unit's terminals/parts (power supply, fuse, speaker output terminal, RCA connector, etc. Locate the unit and route the leads at least 10 cm (3-15/16") away from the car harness. Keep the battery power leads as far away from other leads as possible. Connect the ground lead securely to a bare metal spot (remove any paint or grease if necessary) of the car chassis. If you add an optional noise suppressor, connect it as far away from the unit as possible. Your Alpine dealer carries various noise suppressors, contact them for further information. Your Alpine dealer knows best about noise prevention measures so consult your dealer for further information. If you make this connection yourself, ensure the connection is correct by following the instructions below carefully. To prevent disconnection of the leads or dropping of the unit, do not carry the unit by the wire. If in doubt, consult your dealer or Customer Support regarding correct wire gauge to use. Strip back between 7-10mm (9/32"-3/8") of the power wire's insulation to expose the conductor. notes: · If the length of the exposed conductor is too short, a poor connection may occur causing operation failure or sound interruption. Conversely, if the exposed conductor is too long, an electrical short-circuit may occur. Loosen the unit's wire terminal hexagon screws, and insert the exposed conductor into the terminal and finally tighten to secure the connection. 2 Fuse 3 Speaker Output Terminals Referring to "Cautions on speaker wire connections", insert the speaker wire into the speaker plug, which is then inserted in the speaker output terminal. notes: · Fully insert the speaker plug to avoid poor connection, or the wire coming loose due to vehicle vibration, etc. The speaker plug can be connected either way, regardless of polarity indication. 4 RCA Input Jacks Connect these jacks to the line out leads on your head unit using RCA extension cables (sold separately). [. . . ] Now, increase the amplifier gain until the sound from the speakers becomes distorted. Reduce the gain slightly so the sound is no longer distorted to achieve the optimum gain setting. 9, $ Crossover Mode Selector Switch a) Set to the "LP" position when the amplifier FILTER is used to drive a subwoofer. the frequencies above the crossover point will OFF HP LP be attenuated at 12 dB/octave. [. . . ]