Kenwood KAC-746 Stereo Amplifier User Manual
Contents
1. amp O SPEAKER LEVEL INPUT sisfele ana IGHTO ae Rea WN LY Y UI 7 System examples E Full range 4 channel Subwoofer system Switch setting FILTER OPERATION 1150 HPE eF Lor 5OLPF200 EN CE 200 FREQUENCY Hz J STEREO MONO Lon CENTER UNIT u CONTROL A wma Ale Al oe FILTER INPUT SELECTOR HPE Sa pe Du El nn STEREO lo MONOILeN O Blauen O ee B Switch setting B ridged 80 y FILTER OPERATION 20 orr HPF LPF 50LPF20O a CENTER UNIT FREQUENCY Hz J STEREO l MONO Loh Bridged aaa i OM AB A i FILTER Q INPUT SELECTOR OFF HPF LPF Du El Bin STEREO ET MONO Loh O E u CONTROL B E High pass 80 Hz Subwoofer 80 Hz system Switch settinc H h ass FILTER OPERATION High pass e pe j S if Subwoofer _ e L R AB Al ae FILTER INPUT SELECTOR dged Ou B ri ge Her Sa hor El iia nn STEREO loo MONO Loh A Sen EL EN B Switch setting 100 EN 150 FILTER OPERATION Y KEN orr HPF LPF SOLPF200_ Tel FREQUENCY Hz J STEREO l MONO Loh E Tri mode CENTER UNIT m CONTROL x m OM AE A a FILTER RQ INPUT SEL2. AJ B A I INPUT S LECTOR m CONTROL A u CONTROL B I m AmplifierA Amplifier B Fuse 30 A 2 Battery terminal 3 Ground terminal Power control REMOTE terminal 6 Amplifier A speaker output terminals Amplifier B speaker output terminals D Speaker level input terminals FREQUENCY control When the FILTER switch is set to the HPF High Pass Filter or LPF Low Pass Filter position the threshold frequency can be adjusted with this control FILTER switch High pass or low pass filtering can be applied to the speaker output according to the setting of this switch OPERATION switch The amplification methods of the signals input to amplifiers A and B can be selected independently according to the setting of this switch 4 e STEREO position The amplifier can be used as a stereo amplifier e L R position The input left and right signals are combined before being amplified Use this position when the unit is used for subwoofer speakers or the L R monaural sound is required e MONO Lch position Amplifies the signal input from the left side only Set to this position and make bridged connections to use as a high power monaural amplifier The input right signal is not output aD INPUT SENSITIVITY control 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 Yo
3. e Medium i Screws Round terminal Terminal cover 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 speaker cables Connect the power cable power control cable and grounding cable following this order Install the unit in the car Connect the negative terminal of the battery ACAUTION e Be sure to turn the power off before changing the setting of any switch e f the fuse blows check cables for shorts then replace the fuse with one of the same rating e Check that no unconnected cables or connectors are touching the car body Do not remove caps from unconnected cables or connectors to prevent short circuits e 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 fall e After installation check that the brake lamps winkers and wipers work properly Y 0 01 0 N Installation Self tapping screw 84 x 16 mm Installation board etc thickness 15 mm or more e 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 ins
4. 5 03 accessory car stereo Use the diagram on the right as a guide if O NOTE For the pre output level or the maximum power output refer to the Specifications in the instruction manual of the center unit 42 RCA cable ground lead terminal 43 INPUT SELECTOR switch This switch selects the input method of the signals to be amplified by amplifiers A and B e A B position Amplifies both of the signals input to amplifiers A and B e A position Amplifies only signal input amplifier A with both amplifiers A and B Amplifier A LINE IN terminal 5 Amplifier B LINE IN terminal LINE OUT terminal These jacks output respectively the signals input to amplifiers A and B They always output the stereo signals regardless of the position of the OPERATION switch Nan MAX W Protection function This unit is equipped with a protection function for protecting this unit and your speakers from vanous accidents or problems that can occur When the protection function is triggered the Power indicator goes off and the amplifier stops operating E Power indicator When the power is turned on the Power indicator lights Power indicator 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 E The protection function activates in the following situations e When a speaker output contacts ground e When the unit malfunctions and
5. a DC signal is sent to the speaker output e When the temperature of internal parts exceeds 120 C 248 F eV hen 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 Connection HRCA cable connection CENTER UNIT gt Cassette receiver gt Do not connect cables and leads to both RCA cable input jacks and the speaker input terminals simultaneously for this may cause malfunction or damage CD receiver etc m gt LINE IN Front RCA cable Commercially oa available part Left input White Left input White D xt LINE our E l PUT fL Sensi o A KENWOOD 9 _ FILTER 4 CHANNEL Er Des POWER AMPLIFIER MIN MAX Q A 650 Gia en STEREO am MONO Leh ee z sensitivi U O FILTER u OFF u ne LPF A Q MAX o N oo Gia 200 _ OM hr Hz a STEREO ET MONO Leh Sa a n A s pe INPUT SELECTOR a CONTROL B A z Right input Red B Right input Red B RCA cable ground terminal ACAUTION When using an RCA cable with Do not use this terminal for power source m CONTROL a a power source grounding wire is connected to thi
6. ECTOR HEE LPF Du El Bin STEREO eo mo MONO Loh O len z Al B IR OUT mei B Principle of Tri mode Method of frequency band division using a coil and capacitoresin case of 6dB oct slope Coil L Passes low frequencies and blocks high O dB MES Frequency frequencies Low pass o Capacitor C Passes high frequencies and blocks low 3 dB o frequencies High pass L d C i C 159000 uF l fexR H fc Cut of Frequency Hz Frequency 159 xR mb R Speaker Impedance Q eExample ie 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 ACAUTION 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 8 Troubleshooting guide Often what appears to be a malfunction is due to user error Before calling for service please consult the following table Symptom No sound No sound from one side The output level is too small or too large The sound quality is bad The sound is distorted Cause e Input or output cables are disconnected e Pro
7. KENWOOD KAC 746 INSTRUCTION MANUAL KENWOOD CORPORATION Safety precautions AWARNING Take the following precautions to prevent fire and avoid personal injury eWhen extending the battery cable or ground cable use bmm AWG10 or larger automotive grade cable to avold cable deterioration or damage to the covering e Check that no metal objects coins tools etc are left inside the unit to avoid short circuits elf you smell or see smoke turn the power off immediately and consult your Kenwood dealer e Do not touch the unit during use because the surface of the unit becomes hot and may cause burns if touched ACAUTION Take the following precautions to keep the unit in proper working order e Be sure the unit is connected to a 12V DC power supply with a negative ground connection Accessories e Do not open the top or bottom cover e Do not install the unit in places It Is exposed to direct sunlight high heat or humidity water may splash over it or dust exists elf you have difficulty in installing this unit in your vehicle contact your Kenwood dealer Cleaning the unit elf the surface is dirty wipe it clean with a silicon cloth or soft dry cloth with the power off ACAUTION Do not use hard cloths or paint thinner alcohol or other volatile solvents These may damage external surfaces or remove indicator characters Extemal Number Extemal Number Battery a Yellow u el He
8. T A Ree ats d 0 15 V Se sitvity AVIN rated OUUU ranee nn E A ANE E E E ANAE 40V INPUT AMICS cas 10kQ Low Pass Filter 12 OB Ock Van Ea 50 200 Hz Hion Pass Filter 112 AB OCLIVAMaDIE sacas io 50 200 Hz General Operating Vollager nase 14 4 V 11 16 V allowable Current Consumption tI KHz 10 TAD gg a e a A E 28 A Dimensions VM OC THC wre Sodio 290 x 52 x 230 mm o s atte 3 1 kg
9. TE lead aa optional to each of the battery terminal a cable Left output e Do not allow the cord to directly Front left Right output contact the edge of the iron plate a QO Front right by using Grommets FUSE 30A A Te Pe 1 i E gr penre OLETO Enke A GND BRIDGED ar ATA A EIS u LEVEL INPUT CON PA AS e s e 9 m T m e aa aa ole ejeje Terminal cover en Rear right Battery cable Yellow speaker ae Fire wall Rear left Left output N speaker Rear left Round terminal Grommets Large e te fe Power control cable Ground cable Black To prevent fire caused by a short in the Pass battery and ground cables through supplied wiring connect a fusible link or breaker terminal cover and do nearby the battery s positive terminal terminals After completing connections fasten terminal cover over terminal bracket Round terminal Medium Connect the ground cable to a metal part of 7 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 cable is not connected Round terminal Small Bridged ACAUTION el sungee If you wish to bridge connect a o speaker the speaker impedance must be no less than 4 ohms Connecting a speaker with an IA A impedance lower than 4 ohms may JAE damage the unit examples
10. s terminal CO 6 WSs a ground lead attached connect grounding This unit will be damaged if the the ground lead to this terminal heed mi Speaker level input connection Connect the unit by inserting It in the connection between the genuine accessory car stereo and speakers Power control a REMOTE lead 9 terminal Front 2 Left input A Right input E Front Eu 6060 Pri right le Ed E Ser Genuine accessory Eh z car stereo B Left input 5856 B B Right input ACAUTION Rear left Rear right e The genuine accessory car stereo shall have a 5 Rear maximum power output of no more than 25 W Q e 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 e Do not connect cables and leads to both RCA cable input jacks and the speaker input terminals simultaneously for this may cause malfunction or damage e 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 6 EPower and Speakers cable connection e f a buzzing noise is heard from the ra T Front left speakers when the engine is Power control speaker running connect a line noise filter REMO
11. tallation places such as inside the trunk etc can be considered e Use the extension cables Optional re eam cape GDS TORTIE CRD fr ACA cable o7mm CABWL CAT3WL CAZBWL CASaML RCA cable wamm CASW CATEW CAREW CAWEW Crew ACAUTION e Do not install the unit under the carpet Otherwise heat build up occurs and the unit may be damaged e Install this unit in a location which allows heat to easily dissipate Once installed do not place any object on top of the unit e After installing the unit check to make sure that electrical equipment such as the brake lamps turn signal lamps and windshield wipers operate normally e Install the unit securely in a location that does not interfere with driving Controls This is a 4 channel amplifier including 2 stereo amplifiers in a body One amplifier is referred to as amplifier A and the other is amplifier B This unit is compatible with a large vanety of systems by combining the switches and functions described in the following SPEAKER LEVEL INPUT FUSIPIS0A POWER IN QLETO ORICHT UA BATT G N Sues Qo SE DOG AJ SPEAKER LEVEL INPUT oje jojo elelolel w KENWOOD 4 CHANNEL El PowER AMPLIFIER 50 LPF 200 11 CM unen STEREO monoren d oo stereo Monon Y L R
12. tection circuit may be activated e The fuse may be blown because the volume was too high The input sensitivity adjusting control is not set to the correct position e The speakers cable are connected with wrong polarity e A speaker cable is pinched by a screw in the car body e The switches may be set improperly Remedy e Connect the input or output cables e Check connections by referring to Protection function e Replace the fuse with a new fuse and use a lower volume Adjust the control correctly referring to Controls e Connect them properly checking the of the terminals and cables well e Connect the speaker cable again so that it is not pinched by anything e Set switches properly by referring to Controls and System examples S pecifications Specifications subject to change without notice Audio Section Max Power Output 4 2 4 Channel Mode evcsn ca re net o a ee a JOW x4 3 C annel Mode xc ae a near 7OW x 2 200 W x 1 2 Channel Mode a cts coin eco hla oa A A 200 W x 2 Rated Power Output 4 Q 4 Channel Mode 3 Channel Mode 35 Wx 4 DIN45324 B 14 4 V ER 35 W x 2 1 kHz 0 08 THD 100 W x 1 1 kHz 0 8 THD O Moderna eu 100 W x 2 1 kHz 0 8 THD Rated Power Output 2 Q Enanitos iat 50 W x 4 1 kHz 0 8 THD Frequency Response 0 1 AB ao 5 Hz 50 kHz gnato A ee nn ee AR ad 100 dB Sensitivity VIAX rated Output e A E
Download Pdf Manuals
Related Search