User manual KENWOOD KAC-745

[. . . ] · 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 (4 ) Normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 W ´ 2 Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 W ´ 1 Rated Power Output (4 ) Normal (20 Hz ~ 20 kHz, 0. 08 % THD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 W ´ 2 Normal (DIN45324, +B=14. 4 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 W ´ 2 Bridge (1 kHz, 0. 8 % THD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460 W ´ 1 Rated Power Output (2 ) Normal (1 kHz, 0. 8 % THD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 W ´ 2 Frequency Response (+0, ­3 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Hz ~ 50 kHz Signal to Noise Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 dB Sensitivity (MAX) (rated output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 2 V Sensitivity (MIN) (rated output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. 0 V Input Impedance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 k Low Pass Filter (18 dB/oct. ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Hz ~ 200 Hz (variable) Bass Boost Circuit (90 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 / 12 dB Operating Voltage (11 ~ 16 V allowable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14. 4 V Current Consumption (1 kHz, 10% THD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 A Dimensions (W ´ H ´ D)[mm] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261 ´ 57 ´ 350 Dimensions (W ´ H ´ D)[inch] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1/4 ´ 2-1/4 ´ 13-3/4 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. 6 kg Take the time to read through this instruction manual. Familiarity with installation and operation procedures will help you obtain the best performance from your new power amplifier. For your records General Record the serial number, found on the back of the unit, in the spaces designated on the warranty card, and in the space provided below. [. . . ] · Use a heat-resistant vehicle type cable. Use a cable with a current capacity 20A greater than the amplifier fuse capacity. · 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. Example: One Power Amplifier Is Used Installation procedure 1. Remove the ignition key and disconnect the negative - terminal of the battery to prevent short circuits. Set the unit according to the intended usage. Connect the input and output cables of the units. Connect the power wire, power control wire and grounding wire following this order. Connect the negative - terminal of the battery. 2WARNING s Accessories Part name Terminal cover (Power terminal) Self-tapping screws (ø4 ´ 16 mm) Speaker level input cable External View Number of Items 1 4 1 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. With this connection, shock noise may be generated when the power of the genuine-accessory car stereo is switched ON/OFF. · If you experience problems during installation, consult your Kenwood dealer. · If the unit does not seem to be working right, consult your Kenwood dealer. FCC WARNING This equipment may generate or use radio frequency energy. Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made. · Do not install the unit under the carpet. Otherwise heat build-up occurs and the unit may be damaged. · Install this unit in a location which allows heat to easily dissipate. Once installed, do not place any object on top of the unit. · 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. · This unit has cooling fans to decrease the internal temperature. Be careful not to block the cooling fan openings when installing the unit. [. . . ] connections are complete, place the cover on (thickness : 15 mm or more) the terminal section. Controls POWER IN ! GND SPEAKER P. CON OUTPUT BRIDGED LEFT RIGHT FUSE(30Ax2) 1 BATT. 2 POWER AMPLIFIER 3 4 1 2 34 5 BASS BOOST 6dB OFF 12dB EXPANDER LOW PASS FILTER OPERATION OFF ON OFF ON STEREO MONO(Lch) 0 !@ # $ (MIN)5 INPUT SENSITIVITY(V) 40 20 0. 3 10 (W) 0. 2(MAX) 0. 5 STEREO/BRIDGEABLE AMPLIFIER Cooling fan Operations of the following control and switches are required in accordance with the center unit and speakers connected with this unit. 1 Fuse (30 A ´ 2) 2 Battery terminal 3 Ground terminal 4 Power control terminal 5 SPEAKER OUTPUT terminals · Stereo Connections: When you wish to use the unit as a stereo amplifier, stereo connections are used. · Bridged Connections: When you wish to use the unit as a high-output monaural amplifier, bridged connections are used. (Make connections to the LEFT channel (+) and the RIGHT channel (­) SPEAKER OUTPUT terminals. ) 6 BASS BOOST switch Setting this switch to "+6dB" or "+12dB" emphasizes the bass. 7 EXPANDER switch When this switch is turned ON the dynamic range is increased. System examples s 2-channel system CENTER UNIT L R L R 30 30 KAC-745 MAXIMUM POWER 6 7 8 9 NOTE Power indicator 8 LOW PASS FILTER switch These switches allow filtering of the speaker output signals. Power indicator When the power is turned on, the Power indicator lights. If the Power indicator does not light when the power is turned on, the protection function may be activated. Check whether there is any indication of trouble. · OFF position: The entire bandwidth is output without filtering. For the pre-output level or the maximum power output, refer to the "Specifications" in the instruction manual of the center unit. · ON position: The filter outputs the band of lower frequencies than the frequency set with the LPF FREQUENCY control. @ RCA cable ground lead terminal When using an RCA cable with a ground lead attached, connect the ground lead to this terminal. 2CAUTION 9 OPERATION switch This switch allows selection of the amplification method of input signals. · STEREO position The amplifier can be used as a stereo amplifier. Do not use this terminal for power source grounding. [. . . ]