User manual PIONEER GM-4000F

[. . . ] Be sure to protect all cables and important equipment such as fuel lines, brake lines and the electrical wiring from damage. DO NOT allow amplifier to come into contact with liquids due to, for example, the location where the amplifier is installed. Also, amplifier and speaker damage, smoke, and overheating could result from contact with liquids. In addition, the amplifier surface and the surface of any attached speakers could become hot to the touch and minor burns could result. [. . . ] 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. Speakers to be connected to the amplifier should conform with the standards listed below. If they do not conform, they may catch fire, emit smoke or become damaged. the speaker impedance must be 4 to 8 ohms. Subwoofer impedance must be from 2 to 8 ohms. Amplifier damage, smoke, and overheating could result from improper installation. The amplifier surface could also become hot to the touch and minor burns could result. To properly install and achieve a 2 impedance, wire two 4 speakers in parallel as shown (Diagram C) or use a single 2 speaker. For the Sub Channel of the amplifier, follow the speaker output connection diagram as shown on the front of your amplifier, and wire two 4 speakers in parallel to achieve a 2 load or use a single 2 speaker per channel. If you have any questions or concerns, please contact your local authorized Pioneer dealer or call Pioneer customer service. If you use RCA input jack A only, speaker output for channel A, channel B and the SUB channel is output from channel A. If you use RCA input jacks A and B only, output from channel A and channel B is unchanged, but output from the SUB channel is a mixture of the channel A and channel B signals. If you use RCA input jack A and SUB only, channel A and channel B signals are output from channel A, but output from the SUB channel remains unchanged. When not using RCA input jack B or SUB, do not connect anything to them. Do not install in: --Places where it could injure the driver or passengers if the vehicle stops suddenly. --Places where it may interfere with the driver, such as on the floor in front of the driver's seat. [. . . ] To ensure proper heat dissipation of the amplifier, be sure of the following during installation. --Allow adequate space above the amplifier for proper ventilation. --Do not cover the amplifier with a floor mat or carpet. DO NOT allow amplifier to come into contact with liquids due to, for example, the location where the amplifier is installed. [. . . ]