User manual KENWOOD KAC-645

[. . . ] Also avoid places with too much dust or the possibility of water splashing. When replacing a fuse, only use a new one with the prescribed rating. Using a fuse with the wrong rating may cause your unit to malfunction. To prevent a short circuit when replacing a fuse, first disconnect the wiring harness. [. . . ] The surface temperature of the amplifier will become hot during use. Install the amplifier in a place where people, resins, and other substances that are sensitive to heat will not come into contact with it. When making a hole under a seat, inside the trunk, or somewhere else in the vehicle, check that there is nothing hazardous on the opposite side such as a gasoline tank, brake pipe, or wiring harness, and be careful not to cause scratches or other damage. Do not install near the dashboard, rear tray, or air bag safety parts. The installation to the vehicle should securely fasten the unit to a place in which it will not obstruct driving. If the unit comes off due to a shock and hits a person or safety part, it may cause injury or an accident. After installing the unit, check to make sure that electrical equipment such as the brake lamps, turn signal lamps and windshield wipers operate normally. Adjust this control according to the pre-out level of the center unit connected to this amplifier. Refer to "Specifications" on the center unit's instruction manual about the pre-out level. When this switch is set to "-6dB"/"-12dB", frequencies in the band set with the B. The band rejection allows to reduce resonance inside the vehicle compartment and standing waves. If sound is not output normally, immediately turn power off and check connections. Be sure to turn the power off before changing the setting of any switch. If the fuse blows, check wires for shorts, then replace the fuse with one of the same rating. Do not remove caps from unconnected wires or connectors to prevent short circuits. Sharing the negative wire of the speaker or grounding speaker wires to the metal body of the car can cause this unit to fail. After installation, check that the brake lamps, winkers, and wipers work properly. As this unit accepts speakers with a minimum impedance of 1 ohm, connect speakers with 1-ohm or higher impedance to these terminals. The rated input of the speakers should be no less than the maximum output of the amplifier. When using an RCA cable with a ground lead attached, connect the ground lead to this terminal. Only Kenwood center unit models sold in 1999 or later with a "EXT. Also, a maximum of 3 power amplifiers can be operated at the same time. [. . . ] Connect the ground wire to a metal part of the car chassis that acts as an electrical ground passing electricity to the battery`s negative - terminal. Be sure to install a protective fuse in the power cord near the battery. For the power cord and ground, use a vehicle type (fireproof) power wring cord with a current capacity greater than the unit's fuse capacity. (Use a power wiring cord with a diameter of 14 mm2 (AWG 6) or greater. [. . . ]