Kenwood KAC-6403 Automobile Accessories User Manual
Contents
1. Power control wire Battery wire Protective Fuse Ground wire A channel Left speaker A channel Right speaker B channel Right speaker B channel Left speaker A channel Speaker Bridged B channel Speaker Bridged Lead terminal English 9 System examples 4 channel system CENTER UNIT Front Left speaker Front Right speaker rr Rear Left speaker I Rear Right speaker Ach FILTER ch FILTER INPUT SELECTOR OFF HPF EMI 2 channel Subwoofer system 1 CENTER UNIT Id Left speaker High pass Right speaker High pass Subwoofer L R Bridged Ach FILTER ch FILTER INPUT SELECTOR OFF HPF C m 2 channel Subwoofer system 2 CENTER UNIT Left speaker High pass C Right speaker High pass Subwoofer L R Bridged Ach FILTER B ch FILTER INPUT SELECTOR OFF HPF or MEE B C C t 10 English B Tri mode Subwoofer L R Bridged CENTER UNIT Ach FILTER B ch FILTER INPUT SELECTOR OFF HPE Gr WIP2. 20 Hz 20 kHz 1 96 THD Normal 2 Q 1 kHz Bridged 4 O 1 kHz 1 Frequency Response 0 3 Sensitivity rated output MAX MIN Signal to Noise Ratio Input Impedance Low Pass Filter Frequency 12 dB oct 80 Hz High Pass Filter Frequency 12 dB oct ttt ettet ttti 80 Hz General Operating Voltage 14 4 V 11 16 V allowable Current CONSUMPtON Q u 25 Dimensions W x H x D English 13 KENWOOD
3. damage The impedance of the speakers that are going to be connected should be 20 or greater for stereo connections or 40 or greater for bridged connections When more than one set of speakers are going to be used calculate the combined impedance of the speakers and then connect suitable speakers to the amplifier Combined impedance English 7 Connection E RCA cable or Speaker level input connection RCA cable Connections RCA cable CENTER UNIT CD receiver etc Power control wire Blue White A channel input B channel input Speaker level input Connections Q White Black j Gray Right Gray Black T No line output center unit etc B channe Q Green Left Green Black B channe Q Purple Right Purple Black Speaker level input cable Car fuse box n Battery ACC 8 English Commercially available parts ecccccccccccccc Speaker wire connection Stereo Connections Lead terminal 925 8 m Bridged Connections SS M 95
4. informs you of the condition Refer to page 5 To prevent damage to the machine take the Accessories following precautions Part name Number of Be sure the unit is connected to a 12V DC power ems supply with a negative ground connection Self tapping screws 4 Do not open the top or bottom covers of the unit 04x 16 mm Do not install the unit in a spot exposed to direct Terminal cover Power sunlight or excessive heat or humidity Also avoid terminal places with too much dust or the possibility of water splashing Speaker level input When replacing a fuse only use a new one with the cable 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 NOTE If you experience problems during installation consult your Kenwood dealer If the unit does not seem to be working right consult your Kenwood dealer 2 English Installation Self tapping screw Y 04 x 16 mm V KENWOOD Installation board etc thickness 15 mm or more A CAUTION Do not install in the below locations Unstable location In a location that interferes with driving In a location that gets wet In a dusty location In a place that gets hot In a place that gets direct sunlight In a location that gets hit by hot air Do not install the unit un
5. E aum Principle of Tri mode Method of freguency band division using a coil and capacitor in case of 6dB oct slope Crossover Freguency Coil L Passes low freguencies and blocks high freguencies Low pass 0 dB Capacitor C Passes high freguencies and blocks low dB emere frequencies High pass rm 159xR mH fc fc Cut of Frequency Hz Frequency _ 159000 fcxR uP R Speaker Impedance Q Example When it is required to set a crossover frequency of 120 Hz using speakers with an impedance of 4 ohms Prepare commercially available coil and capacitor with the closest ratings to the results calculated from the formula above The capacitor rating should be as close as possible to 331 25 uF and the coil rating should be as close as possible to 5 3 mH A CAUTION If you wish to bridge connect a speaker the speaker impedance must be no less than 4 ohms 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 English 11 Troubleshooting Guide What might appear to be a malfunction in your unit may
6. KENWOOD 4 3 2 CHANNEL POWER AMPLIFIER AC 6403 INSTRUCTION MANUAL Kenwood Corporation B64 3354 00 00 MV Safety precautions A WARNING Cleaning the unit To prevent injury or fire take the following the front panel gets dirty turn off the power and precautions wipe the panel with a dry silicon cloth or soft cloth When extending the ignition battery or ground A CAUTION wires make sure to use automotive grade wires or other wires with a 5 mm AWG 10 or more to prevent wire deterioration and damage to the wire 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 coating and or cause the indicator letters to peel off To prevent a short circuit never put or leave any metallic objects such as coins or metal tools inside To prevent battery rise he unit When the unit is used in the ACC ON position without If the unit starts to emit smoke or strange smells turning the engine ON it depletes the battery Use it urn off the power immediately and consult your after starting the engine enwood dealer Do not touch the unit during use because the surface of the unit becomes hot and may cause burns if touched A CAUTION Protection function There is a Protection function installed in the unit to protect the unit and speakers from various problems When Protection operates the indicator
7. are to be connected ensure that the combined impedance is 20 or greater for each channel 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 The speakers to be connected should have an impedance of 40 or greater When multiple speakers are to be connected ensure that the combined impedance is 40 or greater A CAUTION The rated input of the speakers should be no less than the maximum output of the amplifier Otherwise malfunction may result 6 English LINE IN terminal A ch B ch 2 Speaker level input terminals NOTE The genuine accessory car stereo shall have a maximum power output of no more than 40 W Do not connect the speaker output leads from a power amplifier Optional to the speaker level input terminals of this unit for this may cause malfunction or damage Do not connect cables and leads to both RCA cable input jacks and the speaker level input erminals simultaneously for this may cause malfunction or damage Connect the power control lead to a power supply which can be turned ON OFF by he ignition key switch ACC line With this connection shock noise may be generated when he power of the genuine accessory car stereo is switched ON OFF Installation procedure Since there are large variety of setting
8. der 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 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 English 3 Controls Indicator Ach FILTER B ch FILTER INPUT SELECTOR E ij A ch FILTER switch This switch allow filtering of the speaker output signals OFF position The original sound without filtering is output HPF High Pass Filter position Only fr
9. equencies of 80 Hz or higher are output Frequencies below 80 Hz are cut B ch FILTER switch This switch allow filtering of the speaker output signals OFF position The original sound without filtering is output LPF Low Pass Filter position Only frequencies of 80 Hz or lower are output Frequencies above 80 Hz are cut The speaker output is automatically turned monaural L R and the bass boost function is activated INPUT SELECTOR switch This switch selects the input method of the signals to be amplified by amplifiers A and B AB position Amplifies both of the signals input to amplifiers A and B A position Amplifies only signal input amplifier A with both amplifiers A and B 4 English UT SENSITIVITYIVI 4 IN O2IMAX 4 mas dem W INPUT SENSITIVITYUV INPUT SENSITIVITY control A ch B ch Set this control according to the pre output level of the center unit connected with this unit or to the maximum power output of the genuine accessory car stereo The sensitivities of amplifiers A and B can be adjusted independently regardless of the position of the input selector switch Use the diagram on the right as a guide NOTE For the pre output level or the maximum power output refer to the Specifications in the instruction manual of the center unit KENWOOD Power indicator When the power is turned on the Power indicator lights If the Pow
10. er indicator does not light when the power is turned on the protection function may be activated Check whether there is any indication of trouble W The protection function is activated in the following situations This unit is equipped with a protection function for protecting this unit and your speakers from various accidents or problems that can occur When the protection function is triggered the Power indicator goes off and the amplifier stops operating When a speaker wire may be short circuited When a speaker output contacts ground When the unit malfunctions and a DC signal is sent to the speaker output When the internal temperature is high and unit wont operate When a ground wire 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 O terminal English 5 Connection B Terminal names 6 Fuse 25 A G Battery terminal Ground terminal 9 Power control terminal Controls the unit ON OFF NOTE Controls the unit power Be sure to connect it with all the systems Speaker output terminals A ch B ch Stereo Connections When you wish to use the unit as a stereo amplifier stereo connections are used The speakers to be connected should have an impedance of 20 or greater When multiple speakers
11. just be the result of slight misoperation or miswiring Before calling service first check the following table for possible problems PROBLEM No sound No sound from one side Blown fuse POSSIBLE CAUSE Input or output cables are disconnected Protection circuit may be activated Volume is too high The speaker cord is shorted SOLUTION Connect the input or output cables Check connections by referring to Protection function Replace the fuse and use lower volume After check the speaker cord and fixing the cause of the short replace the fuse The output level is too small or too large The input sensitivity adjusting control is not set to the correct position Adjust the control correctly referring to Controls The sound quality is bad The sound is distorted The speakers wire are connected with wrong Opolarity A speaker wire is pinched by a screw in the car body The switches may be set improperly Connect them properly checking the of the terminals and wires well Connect the speaker wire again so that it is not pinched by anything Set switches properly by referring to System examples 12 English Specifications Specifications subject to change without notice Audio Section Max POWER cutem ae a dba d ire ebrei se ce b e ede 500W Rated Power Output Normal 4
12. or this unit directly from the battery If it s connected to the vehicles wiring harness it can cause blown fuses etc If a buzzing noise is heard from the speakers when he engine is running connect a line nojse filter optional to each of the battery wire Do not allow the wire to directly contact the edge of he 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 Do not turn the power on if the ground wire is not connected Be sure to install a protective fuse in the power cord near the battery The protective fuse should be the same capacity as the unit s fuse capacity or somewhat larger 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 5 mm AWG 10 or greater 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 W Speaker selection 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
13. s and connections possible according to applications read the instruction manual well to select the proper setting and connection 1 Remove the ignition key and disconnect the negative O terminal of the battery to prevent short circuits Set the unit according to the intended usage Connect the input and output wires of the units Connect the speaker wires Connect the power wire power control wire and grounding wire following this order Install the unit in the car 7 Connect the negative terminal of the battery A WARNING To prevent fire caused by a short in the wiring connect a fusible link or breaker nearby the battery s positive terminal A CAUTION 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 Check that no unconnected wires or connectors are touching the car body Do not remove caps from unconnected wires or connectors to prevent short circuits Connect the speaker wires to appropriate speaker connectors separately 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 mB UN a E Wiring Take the battery wire f
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