User manual KENWOOD KAC-742

[. . . ] (The sound is distorted. ) The input sensitivity adjusting control is not set to the correct position. · The speakers wire are connected with wrong + / polarity. · A speaker wire is pinched by a screw in the car body. · The switches may be set improperly. Specifications Specifications subject to change without notice. Audio Section Max Power Output (2 ½) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 W ´ 1 Max Power Output (4 ½) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 W ´ 1 Rated Power Output (4 ½) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 W ´ 1 (20 Hz ~ 200 Hz, 0. 08 % THD) Rated Power Output (4 ½) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 W ´ 1 (DIN45324, +B=14. 4V) Rated Power Output (2 ½) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 W ´ 1 (100 Hz, 0. 8 % THD) Frequency Response (+0, ­3 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Hz ~ 200 Hz Sensitivity (MAX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 2 V (rated output) Sensitivity (MIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. 0 V (rated output) Signal to Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 dB Input Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 k½ Damping Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . More than 2000 (at · connect) Low Pass Filter Frequency (18 dB/oct. ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ~ 200 Hz (variable) Infrasonic Filter Frequency (18 dB/oct. ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 / 25 Hz Bass Boost Circuit (90 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 / 12 dB Operating Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14. 4 V (11 ~ 16 V allowable) Current Consumption (100 Hz, 10 % THD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 A Dimensions (W ´ H ´ D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290 ´ 56 ´ 200 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-7/16 ´ 2-3/16 ´ 7-14/16 inch Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. 1 kg (6. 8 lbs) Take the time to read through this instruction manual. [. . . ] Connect the negative - terminal of the battery. Turn power ON and ensure that sound is output normally. 2WARNING s Accessories Part name Terminal cover (Power terminal) Self-tapping screws (ø4 ´ 16 mm) External View Number of Items 1 4 To prevent injury or fire, take the following precautions: · When extending the ignition, battery, or ground wires, make sure to use automotive-grade wires or other wires with a 5mm2 (AWG10) or more to prevent wire deterioration and damage to the wire coating. · To prevent a short circuit, never put or leave any metallic objects (such as coins or metal tools) inside the unit. · If the unit starts to emit smoke or strange smells, turn off the power immediately and consult your Kenwood dealer. · Do not touch the unit during use because the surface of the unit becomes hot and may cause burns if touched. 2CAUTION Installation Since the power amplifier has no parts which require operation, it can be installed at a position away from the driver's seat without any hindrances. As generally accepted positions for its installation, places such as inside the trunk, etc. can be considered. 2CAUTION 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 open the top or bottom covers of the unit. · 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. · When replacing a fuse, only use a new one with the prescribed rating. · 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. Self-tapping screw (ø4 ´ 16 mm) Installation board, etc. (thickness : 15 mm or more) s Cleaning the unit If the front panel gets dirty, turn off the power and wipe the panel with a dry silicon cloth or soft cloth. 2CAUTION Do not wipe the panel with a hard cloth or a cloth dampened by volatile solvents such as paint thinner and alcohol. They can scratch the surface of the panel and/or cause the indicator letters to peel off. 8½ 2½ Controls 0 FUSE (30A) POWER IN BATT 10 0. 5 1 2 3 4 0. 3 SUBWOOFER AMPLIFIER · SERVO II P. CON(REMOTE) SPEAKER OUTPUT · SERVO II 15Hz OFF 25Hz OFF 6dB 12dB LINE IN 120 150 1 170 2 3 4 0. 5 0. 3 SPEAKER LEVEL INPUT LEFT R RIGHT 30 GND INFRASONIC BASS BOOST 100 70 50 L GND 200 5 0. 2 SUBWOOFER AMPLIFIER 15 LPF FREQUENCY(Hz) INPUT SENSITIVITY(V) 1 23 4 5 6 15Hz OFF 25Hz OFF 6dB 12dB 120 100 70 150 1 170 50 200 2 3 4 0. 5 0. 3 !@ # 5 (V) 0. 2 KAC-742 INFRASONIC BASS BOOST 5 0. 2 (W) MAXIMUM POWER LPF FREQUENCY(Hz) INPUT SENSITIVITY(V) 25W or greater Do not use this terminal for power source grounding. This unit will be damaged if the power source grounding wire is connected to this terminal. Power indicator · A speaker wire may be short-circuited. [. . . ] Be sure to connect the Sigma servo terminals correctly. · When connecting speakers in a parallel configuration, use speakers with an impedance of 4 ohms or more. Connecting speakers with smaller impedance than 4 ohms will cause malfunction. · The rated input of the speakers connected to this unit should be no less than the maximum output of the amplifier. [. . . ]