Kenwood KAC-819 Instruction Manual

Also see for KAC-819: Instruction manual 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 center unit and this unit accordingto the required application.5. Connect the speaker wires and sigma servofeed back wires.6. Connect the power wire, power control wireand grounding wire following this order.7. Install the unit in the car.8. Connect the negative - terminal of the battery.9. Turn power ON and ensure that sound is outputnormally.To prevent fire caused by a short in the wiring,connect a fusible link or breaker nearby thebattery’s positive terminal.• If sound is not output normally, immediatelyturn power off and check connections. Be sureto perform the sigma servo connectioncorrectly.• Be sure to make correct connections of thesigma servo terminals.• Be sure to turn the power off before changingthe setting 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 orconnectors are touching the car body. Do notremove caps from unconnected cables orconnectors to prevent short circuits.• Connect the speaker wires to appropriatespeaker connectors separately. Sharing thenegative wire of the speaker or groundingspeaker wires to the metal body of the car cancause this unit to fail.• After installation, check that the brake lamps,winkers, and wipers work properly.nPower terminal (23)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.nAccessoriesInstallationSince 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.• 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.• After installing the unit, check to make sure thatelectrical equipment such as the brake lamps, turnsignal lamps and windshield wipers operatenormally.2CAUTION2CAUTION2WARNINGKAC-819MONO POWER AMPLIFIERINSTRUCTION MANUAL© PRINTED IN USA B64-1964-00 (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-819 Serial numberSpecificationsSpecifications subject to change without notice.Audio SectionMax Power Output (2 Ω) ................................................................................................450 W ¥ 1Max Power Output (4 Ω) ................................................................................................300 W ¥ 1Rated Power Output (4 Ω) ............................................150 W ¥ 1 (20 Hz ~ 200 Hz, 0.08 % THD)Rated Power Output (4 Ω) ........................................................150 W ¥ 1 (DIN45324, +B=14.4V)Rated Power Output (2 Ω) ............................................................230 W ¥ 1 (100 Hz, 0.8 % THD)Frequency Response (+0, –3 dB) ............................................................................5 Hz ~ 200 HzSensitivity (MAX) ..............................................................................................0.2 V (rated output)Sensitivity (MIN) ..............................................................................................5.0 V (rated output)Signal to Noise Ratio ............................................................................................................100 dBInput Impedance ....................................................................................................................10 kΩDamping Factor ..............................................................................More than 2000 (at ∑ connect)Low Pass Filter Frequency (18 dB/oct.) ........................................................50 ~ 200 Hz (variable)Infrasonic Filter Frequency (18 dB/oct.) ..........................................................................15 / 25 HzBass Boost Circuit (90 Hz) ................................................................................................6 / 12 dBGeneralOperating Voltage ..............................................................................14.4 V (11 ~ 16 V allowable)Current Consumption (100 Hz, 10 % THD)..............................................................................21 ADimensions (W ¥ H ¥ D) ..................................................................................290 ¥ 56 ¥ 200 mm..................................................................................................11-7/16 ¥ 2-3/16 ¥ 7-14/16 inchWeight......................................................................................................................3.1 kg (6.8 lbs)Safety 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.nCleaning 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.nWiring• 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.• Be sure to attach a protective fuse into thebattery wire close to the battery. Use aprotective fuse having a capacity that is about 10A higher than the maximum current drawn by theamplifier.• Use vehicle-type (fire-resistant) power supplywiring wire for the battery wire and the groundwire. The current capacity of the power supplywiring wire should be about 10 A higher than thatof the protective fuse capacity (which meansabout 20 A higher than the maximum currentdrawn by the amplifier).• 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.nSpeaker 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.• Use speakers that have an impedance of 2Ω orgreater. When more than one set of speakersare going to be used, calculate the combinedimpedance of the speakers and then connectsuitable speakers to the amplifier.2CAUTIONNOTE2CAUTION2WARNINGMaximum Current DrawnProtective FuseCross-sectional Area ofWiring Wire (AWG)21 A40 A ¥ 1 [20 A ¥ 2]5 mm2 (AWG 10) orgreater ¥ 1Example: One Power Amplifier Is UsedPart name Number ofItemsExternalViewTerminal cover(Power terminal) 1Self-tapping screws(ø4 ¥ 16 mm) 4Installation board, etc.(thickness : 15 mm ormore)Self-tapping screw(ø4 ¥ 16 mm)PROBLEMPOSSIBLE CAUSESOLUTIONNo 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.• The connection of the sigmaservo terminals is wrong.• 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".• Check the connection referringto "Sigma servo feed back".• 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 "Controls".8 Ω 2 Ω4Ω 4Ω 4Ω4Ω20 A 20 A20 A20 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.

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