User manual KENWOOD KAC-801

[. . . ] When the unit has failed and direct current voltage is generated to the speaker's output. To prevent damage to the machine, take the following precautions: Be sure the unit is connected to a 12V DC power supply with a negative ground connection. Do not install the unit in a spot exposed to direct sunlight or excessive heat or humidity. Also avoid places with too much dust or the possibility of water splashing. [. . . ] If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. If it's connected to the vehicle's wiring harness, it can cause blown fuses etc. If a buzzing noise is heard from the speakers when the engine is running, connect a line noise filter (optional) to each of the battery wire. Do not allow the wire to directly contact the edge of the iron plate by using Grommets. 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 between 10 mm2 (AWG 8) to 25 mm2 (AWG 4). ) · When more than one power amplifier are going to be used, use a power supply wiring wire and protective fuse of greater current-handling capacity than the total maximum current drawn by each amplifier. The rated input power of the speakers that are going to be connected should be greater than the maximum output power (in Watts) of the amplifier. Use of speakers having input power ratings that are less than the output power of the amplifier will cause smoke to be emitted as well as damage. 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. You can use wires with the following thicknesses: Battery wire and ground wire Power control wire and speaker wire AWG 4 ­ AWG 8 AWG 6 ­ AWG 18 7 ­ 10 mm (9/32" ­ 3/8") Hexagon Wrench (Large) Hexagon Wrench (Small) Make a cut in the wire sheath (insulator made from vinyl, etc. ) at the position 7-10 mm away from the end of the wire, and then remove the unnecessary portion of the sheath by twisting it. Before connecting the remote controller cables, always turn the Bass boost level knob all the way to the left. You can control the Bass boost level of the second and subsequent Slave amplifiers simultaneously from the Master amplifier. The volume level of each amplifier is determined by the setting of the Master amplifier (INPUT SENSITIVITY, boost level of the remote controller). Before connecting the remote controller cables, always turn the Bass boost level knob all the way to the left. When this switch is set to "ON", the inaudible, ultralow frequencies below the frequency set with the "ISF FREQUENCY" control are cut off. [. . . ] When the internal temperature is -22°F/-30°C or less, "-22F"/"-30C" is displayed. The acoustic properties of vehicle compartment tend to cause oscillation due to resonance or unclearness of sound due to standing waves at certain frequencies. The band reject filter can solve the problems of resonance or unclear sound with minimum influence on the sound quality because it eliminates only the frequencies causing resonance or standing waves. The band reject filter cuts only the limited frequencies to minimize influence on the sound quality. [. . . ]