User manual PIONEER GM-D8400M

[. . . ] When the unit does not operate properly, contact your dealer or the nearest authorized PIONEER Service Station. We recommend that you use the special red battery and ground wire [RD-228], which is sold separately. Do not touch the amplifier with wet hands. Otherwise you may get an electric shock. [. . . ] Relationship between the gain of the amplifier and the output power of the head unit Power Normal gain Equal power Power Maximum gain If you raise the gain of the amplifier to an improper level, only distortion is increased and the power increases only slightly. The above illustration shows the gain set to NORMAL. With high output the signal waveform is distorted, if you raise the gain of the amplifier the power changes only slightly. If you decrease the volume of the head unit and set the gain control of the amplifier to the proper position but still the sound cuts out from time to time, contact the nearest authorized PIONEER Service Station. To protect the wiring, wrap adhesive tape around it where they lie against metal parts. Do not route wires where they will get hot, for example where the heater will blow over them. If the insulation heats up, it may become damaged, resulting in a short-circuit through the vehicle body. Make sure that wires will not interfere with moving parts of the vehicle, such as the gearshift, handbrake or seat sliding mechanism. Otherwise the protection circuit may fail to work when it should. Never feed power to other equipment by cutting the insulation of the power supply wire to tap from the wire. Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns. Do not ground the speaker wire directly or connect a negative (­) lead wire for several speakers. This unit is for vehicles with a 12-volt battery and negative grounding. If the car stereo is kept on for a long time while the engine is at rest or idling, the battery may go dead. Turn the car stereo off when the engine is at rest or idling. If the system remote control wire of the amplifier is connected to the power terminal through the ignition switch (12 V DC), the amplifier will always be on when the ignition is on-- regardless of whether the car stereo is on or off. Because of this, the battery could go dead if the engine is at rest or idling. DO NOT connect a subwoofer with a lower impedance than specified in the "Connecting the Speaker Wires" section. Amplifier damage, smoke, and overheating could result from a nonspecified connection. The amplifier surface could also become hot to the touch and minor burns could result. Connect either of two subwoofers to the amplifier; 1: a subwoofer with a 350 W or larger nominal input and an impedance 4 , or 2: a subwoofer with a 600 W or larger nominal input and an impedance 2 . [. . . ] In addition, the amplifier surface and the surface of any attached speakers could become hot to the touch and minor burns could result. To ensure proper installation, use the supplied parts in the manner specified. If any parts other than the supplied ones are used, they may damage internal parts of the amplifier, or they may become loose causing the amplifier to shut down. Never replace the fuse with one of greater value or rating than the original fuse. [. . . ]