Kenwood KAC-929 Instruction Manual

Also see for KAC-929: Service manual

Contents

Installation procedure1. Remove the ignition key and disconnect thenegative - terminal of the battery to preventshort circuits.2. Set the unit according to the intended usage.3. Connect the input and output cables of theunits.4. Connect the speaker wires.5. Connect the power wire, power control wireand grounding wire following this order.6. Install the unit in the car.7. Connect the negative - terminal of the battery.To prevent fire caused by a short in the wiring,connect a fusible link or breaker nearby thebattery’s positive terminal.• Be sure to turn the power off before changing thesetting of any switch.• If the fuse blows, check wires for shorts, thenreplace the fuse with one of the same rating.• Check that no unconnected cables or connectorsare touching the car body. Do not remove caps fromunconnected cables or connectors to prevent shortcircuits.• Connect the speaker wires to appropriate speakerconnectors separately. Sharing the negative wire ofthe speaker or grounding speaker wires to the metalbody of the car can cause this unit to fail.• After installation, check that the brake lamps,winkers, and wipers work properly.■ Speaker level input terminals ($)• The genuine-accessory car stereo shall have amaximum power output of no more than 40 W.• Do not connect the speaker output leads froma power amplifier (Optional) to the speakerlevel input terminals of this unit, for this maycause malfunction or damage.• Do not connect cables and leads to both RCAcable input jacks and the speaker level inputterminals simultaneously, for this may causemalfunction or damage.• Connect the power control lead to a powersupply which can be turned ON/OFF by theignition key switch (ACC line). With thisconnection, shock noise may be generatedwhen the power of the genuine-accessory carstereo is switched ON/OFF.■ Power terminal (234)Connect to their respective terminals the powersupply wire, and ground wire, all of which passthrough the associated terminal cover. Once theconnections are complete, place the cover onthe terminal section.■ AccessoriesInstallationSince the power amplifier has no parts which requireoperation, it can be installed at a position away fromthe driver’s seat without any hindrances.As generally accepted positions for its installation,places such as inside the trunk, etc. can beconsidered.• Do not install the unit under the carpet. Otherwiseheat build-up occurs and the unit may be damaged.• Install this unit in a location which allows heat toeasily dissipate. Once installed, do not place anyobject on top of the unit.• The surface temperature of the amplifier willbecome hot during use. Install the amplifier in aplace where people, resins, and other substancesthat are sensitive to heat will not come into contactwith it.• This unit has cooling fans to decrease the internaltemperature. Be careful not to block the cooling fanopenings when installing the unit. Blocking theseopenings will inhibit the cooling of the internaltemperature and result in malfunction.• When making a hole under a seat, inside the trunk,or somewhere else in the vehicle, check that thereis nothing hazardous on the opposite side such as agasoline tank, brake pipe, or wiring harness, and becareful not to cause scratches or other damage.• Do not install near the dashboard, rear tray, or airbag safety parts.• The installation to the vehicle should securely fastenthe unit to a place in which it will not obstructdriving. If the unit comes off due to a shock and hitsa person or safety part, it may cause injury or anaccident.2CAUTION2CAUTION2WARNINGKAC-929POWER AMPLIFIERINSTRUCTION MANUAL© PRINTED IN USA B64-1975-00 (KM/EM)Take the time to read through this instruction manual.Familiarity with installation and operation procedures will helpyou obtain the best performance from your new power amplifier.For your recordsRecord the serial number, found on the back of the unit, in the spacesdesignated on the warranty card, and in the space provided below.Refer to the model and serial numbers whenever you call upon yourKENWOOD dealer for information or service on the product.Model KAC-929 Serial numberSpecificationsSpecifications subject to change without notice.Audio SectionMax Power Output (4 Ω)Normal ............................................................................................................................300 W × 2Bridge............................................................................................................................1000 W × 1Rated Power Output (4 Ω)Normal (20 Hz ~ 20 kHz, 0.08 % THD) ..........................................................................150 W × 2Normal (DIN45324, +B=14.4 V)......................................................................................150 W × 2Bridge (1 kHz, 0.8 % THD)..............................................................................................460 W × 1Rated Power Output (2 Ω)Normal (1 kHz, 0.8 % THD) ............................................................................................230 W × 2Frequency Response (+0, –3 dB) ................................................................................5 Hz ~ 50 kHzSignal to Noise Ratio................................................................................................................100 dBSensitivity (MAX) (rated output) ..................................................................................................0.2 VSensitivity (MIN) (rated output) ..................................................................................................5.0 VInput Impedance........................................................................................................................10 kΩLow Pass Filter (18 dB/oct.) ........................................................................50 Hz ~ 200 Hz (variable)Bass Boost Circuit (90 Hz) ....................................................................................................6 / 12 dBGeneralOperating Voltage (11 ~ 16 V allowable) ..................................................................................14.4 VCurrent Consumption (1 kHz, 10% THD) ....................................................................................43 ADimensions (W × H × D)[mm] ....................................................................................261 × 57 × 350Dimensions (W × H × D)[inch] ........................................................................10-1/4 × 2-1/4 × 13-3/4Weight ......................................................................................................................................4.6 kgSafety precautionsTo prevent injury or fire, take the followingprecautions:• When extending the ignition, battery, or groundwires, make sure to use automotive-grade wires orother wires with a 5mm2 (AWG10) or more toprevent wire deterioration and damage to the wirecoating.• To prevent a short circuit, never put or leave anymetallic objects (such as coins or metal tools) insidethe unit.• If the unit starts to emit smoke or strange smells,turn off the power immediately and consult yourKenwood dealer.• Do not touch the unit during use because the surfaceof the unit becomes hot and may cause burns iftouched.To prevent damage to the machine, take thefollowing precautions:• Be sure the unit is connected to a 12V DC powersupply 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 directsunlight or excessive heat or humidity. Also avoidplaces with too much dust or the possibility of watersplashing.• When replacing a fuse, only use a new one with theprescribed rating. Using a fuse with the wrong ratingmay cause your unit to malfunction.• To prevent a short circuit when replacing a fuse, firstdisconnect the wiring harness.• If you experience problems during installation,consult your Kenwood dealer.• If the unit does not seem to be working right, consultyour Kenwood dealer.FCC WARNINGThis equipment may generate or use radio frequencyenergy. Changes or modifications to this equipmentmay cause harmful interference unless themodifications are expressly approved in the instructionmanual. The user could lose the authority to operatethis equipment if an unauthorized change ormodification is made.■ Cleaning the unitIf the front panel gets dirty, turn off the power andwipe the panel with a dry silicon cloth or soft cloth.Do not wipe the panel with a hard cloth or a clothdampened by volatile solvents such as paint thinnerand alcohol. They can scratch the surface of the paneland/or cause the indicator letters to peel off.■ Wiring• If a buzzing noise is heard from the speakerswhen the engine is running, connect a line noisefilter (optional) to each of the battery wire.• Do not allow the wire to directly contact the edgeof the iron plate by using Grommets.• Connect the ground wire to a metal part of thecar chassis that acts as an electrical groundpassing electricity to the battery‘s negative -terminal. Do not turn the power on if the groundwire is not connected.• Connect the power cable directly to the battery.It can cause blown fuses if you connect to thevehicle wring harness.• Connect the cable protection fuse close to thebattery. Use a fuse with a capacity 10A greaterthan the amplifier fuse capacity.• Use a heat-resistant vehicle type cable. Use acable with a current capacity 20A greater thanthe amplifier fuse capacity.• When more than one power amplifier are goingto be used, use a power supply wiring wire andprotective fuse of greater current-handlingcapacity than the total maximum current drawnby each amplifier.■ Speaker Selection• The rated input power of the speakers that aregoing to be connected should be greater thanthe maximum output power (in Watts) of theamplifier. Use of speakers having input powerratings that are less than the output power ofthe amplifier will cause smoke to be emitted aswell as damage.• The impedance of the speakers that are going tobe connected should be 2Ω or greater (forstereo connections), or 4Ω or greater (forbridged connections). When more than one setof speakers are going to be used, calculate thecombined impedance of the speakers and thenconnect suitable speakers to the amplifier.2CAUTIONNOTE2CAUTION2WARNINGFuseProtective FuseCross-sectional Area ofWiring Wire (AWG)30 A × 270 A × 1 [35 A × 2]5 mm2 (AWG 10) orgreater × 1Example: One Power Amplifier Is UsedInstallation board, etc.(thickness : 15 mm or more)Self-tapping screw(ø4 × 16 mm)PROBLEM POSSIBLE CAUSE SOLUTIONNo sound.(No sound from one side.)(Blown fuse.)The output level is toosmall (or too large).The sound quality is bad.(The sound is distorted.)• Input (or output) cables aredisconnected.• Protection circuit may beactivated.• Volume is too high.• The speaker cord is shorted.The input sensitivity adjustingcontrol is not set to the correctposition.• The speakers wire areconnected with wrong + / -polarity.• A speaker wire is pinched by ascrew in the car body.• The switches may be setimproperly.• Connect the input (or output)cables.• Check connections by referringto "Power indicator".• Replace the fuse and use lowervolume.• After check the speaker cord andfixing the cause of the short,replace the fuse.Adjust the control correctlyreferring to "Controls".• Connect them properly checkingthe + / - of the terminals andwires well.• Connect the speaker wire againso that it is not pinched byanything.• Set switches properly byreferring to "System examples".8 Ω 2 Ω4Ω 4Ω 4Ω4Ω35 A 35 A35 A35 ATroubleshooting GuideWhat might appear to be a malfunction in your unit may just be the result of slightmisoperation or miswiring. Before calling service, first check the following table for possibleproblems.Part name Number ofItemsExternalViewTerminal cover(Power terminal) 1Self-tapping screws(ø4 × 16 mm) 4Speaker level inputcable 1

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