User manual KENWOOD KAC-648S

[. . . ] Power indicator s The protection function activates in the following situations: · When a speaker cable may be short-circuited. · When the temperature of internal parts exceeds 120°C (248°F). · When a ground cable of the center unit (cassette receiver, CD receiver, etc. ) or this unit is not connected to a metal part serving as an electrical ground passing electricity to the battery's negative terminal. 2 Installation procedure 1. Remove the ignition key and disconnect the negative - terminal of the battery to prevent short circuits. [. . . ] · Connect the speaker cables to appropriate speaker connectors separately. Sharing the negative cable of the speaker or grounding speaker cables 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. Installation Self-tapping screw , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Installation board, etc. (thickness : 15 mm or more) · 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. (Optional. ) Length 0. 5m 1m 2m 4m 5m 6m Type RCA cable CA-2SL CA-12SL CA-22SL CA-52SL RCA cable (ø7mm) CA-3WL CA-13WL CA-23WL CA-53WL RCA cable (ø12mm) CA-5W CA-15W CA-25W CA-45W CA-65W 2CAUTION · Do not install the unit under the carpet. · Install this unit in a location which allows heat to easily dissipate. · 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. Connecting a speaker with an impedance lower than 4 ohms may damage the unit. · Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to do so will result in a drop of the combined impedance with the subwoofer. · Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are sufficient. Coil (L): Passes low frequencies and blocks high frequencies. (Low pass) Capacitor (C): Passes high frequencies and blocks low frequencies. (High pass) 159000 C= (µF) fc=Cut of Frequency (Hz) fc x R R=Speaker Impedance () 159 x R L= (mH) fc 6 Connection s Power cable connection 2WARNING To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery's positive terminal. FUSE(25A) BATT POWER IN SPEAKER OUTPUT BRIDGED GND 25 LEFT RIGHT SPEAKER LEVEL INPUT LEFT RIGHT A SPEAKER LEVEL INPUT A B B L R A P. CON(REMOTE) B Round terminal (Small) Round terminal (Medium) Power terminal Terminal cover Battery cable Power control cable CENTER UNIT Ground cable Round terminal (Large) Protective Fuse Battery Power terminal Connect to their respective terminals the power control cable, power supply cable, and ground cable, all of which pass through the associated terminal cover. Once the connections are complete, place the cover on the terminal section. Wiring · 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 cable. · Do not allow the cord to directly contact the edge of the iron plate by using Grommets. · Connect the ground cable 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 attach a protective fuse into the battery cable close to the battery. [. . . ] To Power control (REMOTE) terminal A Left input A Right input FUSE(25A) BATT POWER IN SPEAKER OUTPUT BRIDGED GND 25 LEFT RIGHT SPEAKER LEVEL INPUT LEFT RIGHT A SPEAKER LEVEL INPUT A B B L R A P. CON(REMOTE) B ACC Car fuse box B Right input B Left input T PU IN L IGHT VE R LE Battery ER K EAT SP LEF Front Right Genuine-accessory car stereo Front Left Rear Left Rear Right Lead terminal (Commercially available parts) 2CAUTION · The genuine-accessory car stereo shall have a maximum power output of no more than 25 W. · Do not connect the speaker output leads from a power amplifier (Optional) to the speaker input terminals of this unit, for this may cause malfunction or damage. · Connect the power control lead to a power supply which can be turned ON/OFF by the ignition key switch (ACC line). With this connection, shock noise may be generated when the power of the genuine-accessory car stereo is switched ON/OFF. 10 Troubleshooting Guide What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. [. . . ]