Kenwood KAC-959 Stereo Amplifier User Manual
Contents
1. 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 Amplifier SUB speaker output terminal As this unit accepts speakers with a minimum impedance of 2 ohms connect speakers with 2 ohm or higher impedance to these terminals Speaker level input terminals A center unit with no RCA output can still be System examples E 5 channel system CENTER UNIT p OPERATION AB SUB STEREO wooh far INPUT SELECTOR A AB INPUT SELECTOR OPERATION AG SUB 0000 0090 150Hz 150Hz OHz OFF 80Hz OFF 150Hz 150Hz 80Hz OFF 80Hz OFF am am uo A CH HPF B CH HPF a AB INPUT SI ECTOR Bo s connected to the speaker output Again even without a power control signal the power is switched ON OFF automatically by the speaker signal HPF High Pass Filter switch When this switch is set to 80 Hz or 150 Hz frequencies below the setting value will be cut INPUT SELECTOR A AB switch This switch toggles the input signal of amplifier B A position The input for terminal A is output from amplifiers A and B AB position The input for terminal A is output from amplifier A while the input for terminal B is output from amplifi2. Om B ch HPF RCA cable 200 y E Speaker stereo connection Power control wire SUB A AJG3 e Oe gro A Subwoofer B ch HPF MIN 5 0 2 MAX W SENSITIVITY V Power indicator of the INPUT SELECTOR A AB switch and the OPERATION switch SUB position The input for the SUB terminal is output by amplifier SUB Power indicator When the power is turned on the Power indicator lights 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 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 e When a speaker wire may be short circuited e When a speaker output contacts ground e When the unit malfunctions and a DC signal is sent to the speaker output e When the internal temperature is high and unit won t operate e When a ground wire of the center unit cassette receiver CD receiver etc or this uni
3. connections to use as a high power monaural amplifier The input right signal is not output INPUT SELECTOR AB SUB switch This switch toggles the input signal of amplifier SUB AB position The input for terminals A and B input is mixed and output from amplifier SUB The input signal varies according to the setting For safe installation read Installation procedure before starting work receiver mll Rear left speaker s Rear right speaker Subwoofer CENTER UNIT p STEREO MONO Lch x INPUT INPUT SELECTOR SELECTOR CENTER UNIT OPERATION ME STEREO MONOLLch w an input 45 SELECTOR 50 e e e e e e e e e e A ch HPF e e e e e e e e A A INPUT SELECTOR OPERATION Gua STEREO MONO Lch Oe input 5 SELECTOR Cm A AB INPUT SELECTOR OPERATION B GU STEREO MONO Lch mno INPUT 15 SELECTOR A ch HPF A AB INPUT SELECTOR 50 SUB CH LPF 3 FREQUENCY Hz Left speaker Right speaker alie cq oot Br goHz OFF G 20h OFF 150
4. 30 A x 2 5 mm AWG 10 or greater x 1 a mae 30 A 30A 30A E Speaker Selection e 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 damage e The impedance of the speakers that are going to be connected should be 2Q or greater for stereo connections or 4Q 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 Cross sectional Area of Wiring Wire AWG eek Installation procedure 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 cables 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 unit in the car 7 Connect the negative terminal of the battery AWARNING To prevent fire caused by a short in the wiring connect a fusible link or breaker nearby the battery s positive terminal ACAUTION e Be sure to turn the power off before changing the setting of any switch e f the fuse blows check wi
5. Max Power Output B Channel MOd6 lt 1 vs cctesecasceseccvezsadogszecetghicsncenceotcel iiaeaa 80 W x 4 4 Q 240 W x 1 4 Q 4 Channel Q 240 W x 1 4 Q 3 Channel Q 320 W x 1 2 Q Rated Power Output 4 Q 5 Channel Mode ci2 2 he ean kM eek eee 40W x44 120W x1 20 Hz 20 kHz less than 0 08 THD 20 Hz 200 Hz less than 0 08 THD E EAN E EE A 40 W x 4 120 W x 1 DIN45324 B 14 4 V Tr 4 Channel Mode cccccecccscccccsecccesscecceseeecsseeeessaeeeesseeeeessaeeenes 40Wx2 120Wx1 120W x 1 20 Hz 20 kHz 0 08 THD 1 kHz 0 8 THD 100 Hz 0 08 THD 3 Channel Mode 0000 120 W x 2 1 kHz 0 8 THD 120 W x 1 100 Hz 0 08 THD CHO1 Rated Power Output 2 Q 5 Channel Mode 0cccccceeeeee 60 W x 4 1 kHz 0 8 THD 150 W x 1 100 Hz 0 8 THD BEES F Frequency Response 0 3 dB ccccccccceescscscsesetesseensesesescssseseaseeteeeesessssseseeeeiees 5 Hz 50 kHz Take the time to read through this instruction manual Signal to NOISE Rati siirsin a eaae a i E E a E EiT 100 dB Familiarity with installation and operation procedures will help Sensitivity MAX etare een iene ei anet ee EEEE E AE a E NESE ea aa 0 2 V rated output you obtain the best performance from your new power amplifier ee E N E E kt Ae a tanec el 5 0 V rated ee For your records npu tlmpedaht Esran a ee a aE aiar OE n iO AE a anaia dead P High Pass Filter Frequency 12 dB oct A B Channel
6. oo cccssecsssecssssssssssssseseseeeeeeeens 80 Hz 150 Hz Record the serial number found on the back of the unit in the spaces Low Pass Filter Frequency 18 dB oct SUB channel 50 200 Hz Variable designated on the warranty card and in the space provided below Infrasonic Filter Frequency 18 dB oct SUB Channel cccccccececesssesesteteteeseseseseststetesesssessseeees 15 Hz Refer to the model and serial numbers whenever you call upon your General KENWOOD dealer for information or service on the product Operating Voltage 11 16 V allowable 0 cccceecececeeeeeeeeeeeeeeeeeeaeeeeeeseeesseseeeeseessseenseess 14 4V Model KAC 959 Serial number Current Consumption 1 kHz 10 THD cccccccccccccsscecesscceesseecesseeccssaeeccsseesetsaeecessaeesesseeeeeees 48 A Dimensions W x H x D 290 x 56 x 320 mm 11 7 16 x 2 3 16 x 12 5 8 in PRINTED IN USA B64 1980 00 KM EM WAVES NE ae sees oer cases a E E ETE 5 2 kg 11 4 lbs Safety precautions AWARNING To prevent injury or fire take the following precautions e When extending the ignition battery or ground wires make sure to use automotive grade wires or other wires with a 5mm AVWWG10 or more to prevent wire deterioration and damage to the wire coating e To prevent a short circuit never put or leave any metallic objects such as coins or metal tools inside the unit e f the unit starts to emit smoke or strange smells turn off the power im
7. Do not install near the dashboard rear tray or air bag safety parts e 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 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 Self tapping screw 24x 16mm Installation board etc thickness z x K 15 mm or more Controls 1 AS ON 4 0 3 ho 7 Ma eU fal The unit is a 5 channel amplifier incorporating 2 stereo amplifiers and 1 monaural amplifier in a single body The stereo amplifier on one side is called amplifier A while the one on the other side is amplifier B The monaural amplifier is called the amplifier SUB This unit is compatible with a large variety of systems by combining the switches and functions described in the following Fuse 25 A x 2 Power control terminal Battery terminal Ground terminal Amplifier A B speaker output terminals e Stereo Connections When you wish to use the unit as a stereo amplifier stereo connections are used e Bridged Connections
8. Troubleshooting Guide What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring Before calling service first check the following table for possible problems PROBLEM POSSIBLE CAUSE SOLUTION No sound e Input or output cables are e Connect the input or output No sound from one side disconnected cables e Protection circuit may be e Check connections by referring activated to Power indicator e Volume is too high e Replace the fuse and use lower volume e After check the speaker cord and fixing the cause of the short replace the fuse KENWOOD KAC 959 5 CHANNEL POWER AMPLIFIER INSTRUCTION MANUAL KENWOOD CORPORATION Blown fuse e The speaker cord is shorted 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 e The speakers wire are connected with wrong polarity e A speaker wire is pinched by a screw in the car body e Connect them properly checking the of the terminals and wires well e Connect the speaker wire again so that it is not pinched by anything e Set switches properly by referring to System examples e The switches may be set improperly Specifications Specifications subject to change without notice Audio Section
9. anel 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 E Wiring e 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 e Do not allow the wire to directly contact the edge of the iron plate by using Grommets e 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 e Be sure to attach a protective fuse into the battery wire close to the battery Use a protective fuse having a capacity that is about 10 A higher than the maximum current drawn by the amplifier e Use vehicle type fire resistant power supply wiring wire for the battery wire and the ground wire The current capacity of the power supply wiring wire should be about 10 A higher than that of the protective fuse capacity which means about 20 A higher than the maximum current drawn by the amplifier e 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 Example One Power Amplifier Is Used Protective Fuse 60 Ax 1
10. er B 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 The sensitivities of amplifiers A B and SUB can be adjusted independently regardless of the position of the input selector switch NOTE For the pre output level or the maximum power output refer to the Specifications in the instruction manual of the center unit RCA cable ground lead terminal Connection NOTE Pront left speaker CENTER UNIT Cassette Front right speaker CD receiver etc e E RCA cable connection OPERATION G N sao tron OH E au INPUT INPIT atthe When using an RCA cable with a ground lead attached connect the ground lead to this terminal ACAUTION Do not use this terminal for power source grounding This unit will be damaged if the power source grounding wire is connected to this erminal Amplifier A B SUB LINE IN terminal SUB CH LPF Low Pass Filter FREQUENCY control This control adjusts the frequency band output from this SUB channel OPERATION switch This switch is used to select the operation mode of the amplifier STEREO position The amplifier can be used as a stereo amplifier e MONO Lch position Amplifies the signal input from the left side only Set to this position and make bridged
11. mediately 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 To prevent damage to the machine take the following precautions e Be sure the unit is connected to a 12V DC power supply with a negative ground connection e Do not open the top or bottom covers of the unit e 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 e When replacing a fuse only use a new one with the prescribed rating Using a fuse with the wrong rating may cause your unit to malfunction e To prevent a short circuit when replacing a fuse first disconnect the wiring harness NOTE e f you experience problems during installation consult your Kenwood dealer e f the unit does not seem to be working right consult your Kenwood dealer FCC WARNING This equipment may generate or use radio frequency energy Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual The user could lose the authority to operate this equipment if an unauthorized change or modification is made E 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 p
12. nerated when the power of the genuine accessory car stereo is switched ON OFF E Power terminal Connect to their respective terminals the power supply wire and ground wire all of which pass through the associated terminal cover Once the connections are complete place the cover on the terminal section E Accessories Part name External Number of View Items S Terminal cover Power terminal Self tapping screws 04 x 16 mm Installation 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 installation places such as inside the trunk etc can be considered 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 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 e 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 e
13. res 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 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 e After installation check that the brake lamps winkers and wipers work properly E Speaker level input terminals D When the genuine accessory car stereo power is turned ON OFF check that the power to this unit has followed suit In some cases the power control is not correctly operated by the genuine accessory car stereo If this is the case connect the ACC or power control signal to the P CON terminal ACAUTION e The genuine accessory car stereo shall have a maximum power output of no more than 40 W e 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 e 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 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 ge
14. t is not connected to a metal part serving as an electrical ground passing electricity to the battery s negative terminal E Speaker level input connection Genuine accessory car stereo No line output center unit etc 200 SUB CH LPF FREQUENCY Hz 43 Battery E Speaker bridge connection SUB A Bridge A Bridge Description of markings in the figure Battery wire Protective Fuse A L Left A Front left AE Front right B R Right B Rear left B GB Rear right SUB Subwoofer F Front R Rear Power control wire N F Non fader Commercially available Ground wire 7 parts F Oa Battery
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