Kenwood KAC-7252 Stereo Amplifier User Manual
Contents
1. Terminal cover 4 F j Battery wire Protective Fuse Ground wire Battery L Speaker Bridged i n E Remote cable connection KAC 7252 only it Remote cable CK EO III GND ron mon fi Kay al E C E e uU LI la II ZA Remote controller Controls Remote controller LUN o E m 0 O KAC 7252 25200 E 9 KENWOOD 9 9 Q9 KAC 7252 BER ia lene S DU UU ML KENWO 8 O o o E Stereo Bridgeable ig D 2 Power Amplifier S gt M IC S megse men EOM gt 1 1 03 KENWOOD 8 KENWOOD 3 00 MINIS O 2 MAX KAC 7202 Bass Bader Gea rea en FILTER OPERATION HPP MCNOLLo ee l 1 00600 BATT GND SPEAKER OUTPUT A pe o a ETO AIGHTO Sf al gi e C2. just be the result of slight misoperation or miswiring Before calling service first check the following table for possible problems PROBLEM POSSIBLE CAUSE No sound Input or output cables are disconnected No sound from one side Protection circuit may be activated Blown fuse 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 The input sensitivity adjusting con rol is not set to the correct Adjust the control correctly referring to Controls or too large position The sound quality is bad The speakers wire are connected with wrong Opolarity Connect them properly checking the of the terminals The sound is distorted A speaker wire is pinched by a screw in the car body and wires well The switches may be set improperly Connect the speaker wire again so that it is not pinched by anything Set switches properly by referring to System examples The Remote Controller does The Remote Cable is disconnected not function The BOOST LEVEL is set to 098 Connect the Remote Cable securely and correctly Adjust the BOOST LEVEL Specifications Specifications sub
3. not seem to be working right consult your Kenwood dealer 2 English 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 ACAUTION 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 To prevent battery rise When the unit is used in the ACC ON position without turning the engine ON it depletes the battery Use it after starting the engine Protection function 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 won t 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 terminal Wiring Take the battery wire for this unit directly from the battery If it s conn
4. the cooling fan and ducts of the unit are blocked Blocking these openings will inhibit the cooling of the internal emperature and result in malfunction When making a hole under a seat inside the trunk or somewhere else in he 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 Connection AWARNING To prevent fire caused by a short in the wiring connect a fusible link or breaker nearby the battery s positive terminal ACAUTION 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 unconn
5. KENWOOD KAC 7252 KAC 7202 INSTRUCTION MANUAL KENWOOD CORPORATION Safety precautions AWARNING 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 8 mm AWG 8 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 A CAUTION 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 Using a use 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
6. VII III uu 5 88 f T FUSE 40A Profan E REMOTE o NOTE The control panel locates under the front side cover Remove the cover to access to its controls or adjustment See page 3 CD Fuse 40A NOTE f you cant find the specified capacity fuse at your store etc consult your Kenwood dealer 2 Battery terminal 3 Ground terminal 4 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 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 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 4O or greater ACAUTION The rated input of the speakers should be no ess than the maximum output of the amplifier Otherwise malfunction may result REMOTE terminal KAC 7252 only Connects the Remote cable NOTE Use the Remote cable of
7. ange should be boosted FREQUENCY Bass boost frequency control KAC 7252 only Sets the center frequency around which the low frequency range should be boosted ereo amplifier English 5 System examples 8 2 channel system B High power 2 channel subwoofer system CENTER UNIT Left subwoofer Bridged LI Left speaker LI Right speaker CENTER UNIT Right subwoofer Bridged 3 2 150 400 400 70 150 y 1 70 05 50 200 50 200 MINIS O2IMAX 2 450 100 100 70 150 4 4 70 95 50 200 50 200 MIN S 0 2 MAX LPF HPF Pi FREQUENCY Hz FREGUENCY Hz SENSITIVITYIV FILTER OPERATION HPF MONO Lch B LPF STEREO LPF HPF INPUT FREQUENCY 2 FREQUENCY Hz SENSITIVITY V FILTER OPERATION HPF MONO Loch OFF LPF STEREO 8 2 channel Subwoofer system LL Left speaker High pass CENTER UNIT LI Right speaker High pass Subwoofer L R Bridged 150 100 3 2 450 400 3 2 400 400 70 50 y 4 70 LA 1 70 o5 70 os so 200 50 200 50 200 MM 0 21MAx 50 200 MINIS 0 2 MAX LPF HPF INPUT LPF HPF INPUT redet 6 sen a SENSITIVITY V FILTER OPERATION FILTER OPERATION HPF i HPF D OFF oFF STEREO STEREO B Tri mode Principle of Tri mode High pass OOO Method of frequency band division using a coil and capac
8. control Sets the cutoff frequency when the FIL switch is set to HPF 05 FILTER switch This switch allows to apply high pass or low pass filtering to the speaker outputs HPF High Pass Filter position The filter outputs the band of higher requencies than the frequency set with the HPF FREQUENCY control OFF position The entire bandwidth is output wi iltering LPF Low Pass Filter position The filter outputs the band of lower frequencies han the frequency set with the LPF FREQUENCY control The speaker output is automatical monaural L R TER TER hout y switched to OPERATION switch This switch is used to select the operation mode of the amplifier STEREO position The amplifier can be used asa s 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 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 accessory car stereo Use the diagram on the right as a guide For the pre output level or the maximum power output refer to the Specifications in the instruction manual of the center unit BOOST LEVEL Bass boost level control KAC 7252 only Sets the level by which the low frequency r
9. ected to the vehicle s wiring harness it can cause blown fuses etc 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 wire Do not allow the wire to directly contact the edge of the 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 8 mm AWG 8 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 han the total maximum current drawn by each amplifier 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 he amplifier will cause smoke to be emitted as well as damage The impedance of the speakers that are
10. ected 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 NOTE E RCA cable or Speaker level input connection RCA cable Connections CENTER UNIT CD receiver etc RCA cable Power control wire RCA cable ground terminal Left input Speaker level input Connections Cable Color of the connector Do not connect cables and leads to both RCA Genuine accessory car stereo No line output center unit etc cable input jacks and the speaker level input terminals simultaneously for this may cause malfunction or damage Commercially available parts ACAUTION Before connecting the remote controller cables always set the Bass boost level control to 0dB 4 English Gray Black E Right Right input Car fuse box En a ACC C Battery W Power wire and Speaker wire connection Power control wire gt eee
11. going to be connected should be 20 or greater for stereo connections or 4O 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 he amplifier Combined impedance Installation 380 mm 320 mm j 06 o o o o E E C Ww c gt aj o O N co CI N N NOTE The rear side cover is fixed and cannot be removed Front side cover Hexagon socket head cap screw T M4 x 8 mm Hexagon Wrench Cooling fan Self tapping screw 95 x 18 mm Installation board etc thickness 15 mm or more E Remote controller KAC 7252 only Mounting bracket Remote controller Self tapping screw 22 6 x 12 mm Accessories Part name External View Number of Items Self tapping screws 085 x 18 mm an External View Es Terminal cover Power terminal Speaker level input cable Hexagon Wrench KAC 7252 only Part name Number of Items Remote cable Remote controller ounting bracket Self tapping screws 92 6 x 12 mm Installation procedure Since there are large variety of set
12. itor in case of 608 0CL slope L R Bridged Coil L Passes low frequencies and blocks high frequencies Low pass CENTER UNIT Capacitor C Passes high frequencies and blocks low frequencies High pass Frequency 22 159X 159000 fc Cut of Frequency Hz 4 L H e F 0 fc us fc xR HP R Speaker Impedance 0 50 200 50 200 MIN 5 O 2 MAX ev SENSTIMITY V Example When it is required to set a crossover frequency of 120 Hz using speakers with an FILTER OPERATION impedance of 4 ohms HPF MONO Lch 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 OFF LPF STEREO 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 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 6 English Troubleshooting Guide What might appear to be a malfunction in your unit may
13. ject to change without notice AUGIO SECEION sccssisccsssnssscssssnsssencssconcensssensascaasonsassneoasencenvesencsosenSesbessonsesensennscedasssesosneess oes KAC 7252 KAC 7202 Max Power Output es 1000 W 920 W Rated Power Output B 14 4 V Normal 40 20 Hz 20 kHz 0 08 THD tritt aaa 170Wx2 150Wx2 4 0 DIN 45324 B 14 4V 150W x2 2 Q 1 kHz 0 8 THD 230 VV x 2 Bridged 4 O 1 kHz 0 8 THD 460 VV x 1 Sensitivity rated output MAX 02V MIN 50V Input Impedance 10 kO Frequency Response 0 5 Hz 50 kHz Signal to Noise Ratio s 100 dB 100 dB Low Pass Filter Frequency 24 dB oct 50 200 Hz variable 50 200 Hz variable High Pass Filter Frequency 12 dB oct 50 200 Hz variable 50 200 Hz variable Bass Boost Circuit 0 18 dB variable 0 18 dB variable Bass Boost Frequency 40 100 Hz variable 40 Hz General eren eene enne Operating Voltage Current Consumption Installation Size W x H x D Weight eeeeeeeessseeeeeesssssss KAC 7252 KAC 7202 144V 11 16 V allowable 144 V 11 16 V allowable 40A 40A 380 x 61 x 286 mm 380 x 61 x 286 mm u DB kg 5 7 kg English 7
14. the accessory 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 x1 malfunction or damage Do not connect cables and leads to both RCA cable input jacks and the speaker level input terminals simultaneously 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 RCA cable ground lead terminal When using an RCA cable with a ground lead attached connect the ground lead to this erminal 9 LINE IN terminal LINE OUT terminal The signal that s input from the line input erminal is output Power indicator When the power is turned on the Power indicator lights f 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 See page 2 2 BASS BOOST LEVEL control KAC 7202 only Sets the low frequency level to be compensated amp 3 LPF FREQUENCY control Sets the cutoff frequency when the FIL switch is set to LPF HPF FREQUENCY
15. tings 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 terminal of the battery to prevent short circuits 2 Set the unit according to the intended usage 3 Connect the input and output wires of the units 4 Connect the speaker wires 5 Connect the power wire power control wire and grounding wire following this order 6 Install the installation fittings in the unit 7 Attach the unit 8 Install the remote controller KAC 7252 only 9 Connect the negative terminal of the battery ACAUTION Do not install in the below locations Unstable location In a location that interferes with driving In a location hat 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 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 he 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 fan to decrease the internal temperature Do not mount the unit in a place where
Download Pdf Manuals
Related Search