Kenwood Kac819 Users Manual KAC 819
Kenwood-Kac-819-Owner-S-Manual kenwood-kac-819-owner-s-manual
KAC-819 to the manual 08f92e78-e40f-0fb4-1989-f0acfd507709
2015-01-23
: Kenwood Kenwood-Kac819-Users-Manual-262956 kenwood-kac819-users-manual-262956 kenwood pdf
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KAC-819(KE)1En 02.12.16 11:29 AM Page 1 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 No sound. (No sound from one side.) (Blown fuse.) POSSIBLE CAUSE SOLUTION • Connect the input (or output) cables. • Check connections by referring to "Power indicator". • Check the connection referring to "Sigma servo feed back". • Replace the fuse and use lower volume. • After check the speaker cord and fixing the cause of the short, replace the fuse. • Input (or output) cables are disconnected. • Protection circuit may be activated. • The connection of the sigma servo terminals is wrong. • Volume is too high. • 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.) • The speakers wire are connected with wrong + / polarity. • A speaker wire is pinched by a screw in the car body. • Connect them properly checking the + / - of the terminals and wires well. • Connect the speaker wire again so that it is not pinched by anything. • Set switches properly by referring to "Controls". • The switches may be set improperly. KAC-819 MONO POWER AMPLIFIER INSTRUCTION MANUAL Specifications Specifications subject to change without notice. Audio Section Max Power Output (2 Ω) ................................................................................................450 W × 1 Max Power Output (4 Ω) ................................................................................................300 W × 1 Rated 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 Hz Sensitivity (MAX) ..............................................................................................0.2 V (rated output) Sensitivity (MIN) ..............................................................................................5.0 V (rated output) Signal to Noise Ratio ............................................................................................................100 dB Input Impedance ....................................................................................................................10 kΩ Damping 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 Hz Bass Boost Circuit (90 Hz) ................................................................................................6 / 12 dB Take the time to read through this instruction manual. Familiarity with installation and operation procedures will help you obtain the best performance from your new power amplifier. For your records Record the serial number, found on the back of the unit, in the spaces designated on the warranty card, and in the space provided below. Refer to the model and serial numbers whenever you call upon your KENWOOD dealer for information or service on the product. Model KAC-819 Serial number General Operating Voltage ..............................................................................14.4 V (11 ~ 16 V allowable) Current Consumption (100 Hz, 10 % THD)..............................................................................21 A Dimensions (W × H × D) ..................................................................................290 × 56 × 200 mm ..................................................................................................11-7/16 × 2-3/16 × 7-14/16 inch Weight......................................................................................................................3.1 kg (6.8 lbs) Safety precautions 2WARNING 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 5mm2 (AWG10) 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. 2CAUTION 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 fuse with the wrong rating may cause your unit to malfunction. • To prevent a short circuit when replacing a fuse, first disconnect the wiring harness. ■ Wiring • 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 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. • 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). • 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 Maximum Current Drawn Protective Fuse Cross-sectional Area of Wiring Wire (AWG) 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. ■ Cleaning the unit 20 A 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. 20 A 20 A ■ 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 the amplifier will cause smoke to be emitted as well as damage. • Use speakers that have an impedance of 2Ω or greater. 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. If the front panel gets dirty, turn off the power and wipe the panel with a dry silicon cloth or soft cloth. 2CAUTION 21 A 40 A × 1 [20 A × 2] 5 mm2 (AWG 10) or greater × 1 20 A NOTE • If you experience problems during installation, consult your Kenwood dealer. • If the unit does not seem to be working right, consult your Kenwood dealer. © PRINTED IN USA B64-1964-00 (KM/EM) 4Ω 4Ω 4Ω 8Ω 2Ω 4Ω 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 center unit and this unit according to the required application. 5. Connect the speaker wires and sigma servo feed back wires. 6. Connect the power wire, power control wire and 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 output normally. 2WARNING To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery’s positive terminal. 2CAUTION • If sound is not output normally, immediately turn power off and check connections. Be sure to perform the sigma servo connection correctly. • Be sure to make correct connections of the sigma servo terminals. • 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 cables or connectors are touching the car body. Do not remove caps from unconnected cables 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. ■ Power terminal (23) 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. ■ Accessories Part name External View Number of Items Terminal cover (Power terminal) 1 Self-tapping screws (ø4 × 16 mm) 4 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. 2CAUTION • 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 the amplifier in a place where people, resins, and other substances that are sensitive to heat will not come into contact with it. • 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. • 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. Self-tapping screw (ø4 × 16 mm) Installation board, etc. (thickness : 15 mm or more) KAC-819(KE)1En 02.12.16 11:29 AM Page 2 Controls 0 POWER IN FUSE (30A) 30 BATT ∑ SERVO II GND SPEAKER OUTPUT 15Hz ∑ SERVO II 6dB 25Hz OFF OFF 12dB P.CON(REMOTE) BASS BOOST 100 170 200 LPF FREQUENCY(Hz) 2 3 4 5 6 15Hz 120 6dB 25Hz OFF OFF 100 12dB BASS BOOST 7 Operations of the following control and switches are required in accordance with the centre unit and speakers connected with this unit. 1 FUSE (30 A × 1) 2 Battery terminal 3 Ground terminal 4 Power control (REMOTE) terminal 5 Speaker output terminals 170 200 50 LPF FREQUENCY(Hz) 8 5 GND SUBWOOFER AMPLIFIER 0.2 ! @ 9 7 INFRASONIC FILTER switch Ultralow frequencies that cannot be reproduced even by a subwoofer speaker do not become sound but become unnecessary oscillations, which affect the sound by causing distortion, 0 0 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. 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 When using an RCA cable with a ground lead attached, connect the ground lead to this terminal. 2CAUTION Connection *…Commercially available parts For safe installation, read "Installation procedure" before starting work. ■ RCA cable connection ■ Speaker level input connection CENTER UNIT (Cassette receiver, CD receiver, etc.) 0.3 SUBWOOFER AMPLIFIER KAC-819 5 (V) 0.2 MAXIMUM POWER This control adjusts the frequency band output from this unit. 2CAUTION 1 2 3 4 25W or greater 9 LPF(Low-Pass Filter) FREQUENCY control Be sure to make proper connections to the SIGMA SERVO II terminals. Incorrect connection may result in lack of sound output or other malfunctions. 15 (W) 0.2 etc. Setting this switch to "15 Hz" or "25 Hz" cuts the frequencies below the respective frequency. This improves the reproduction performance of the speakers by eliminating unnecessary oscillations which will not become sound. 6 SIGMA SERVO II terminals # INPUT SENSITIVITY(V) Setting this switch to "+6dB" or "+12dB" emphasizes the bass. The rated input of the speakers should be no less than the maximum output of the amplifier. Otherwise malfunction may result. 0.5 RIGHT INPUT SENSITIVITY(V) 8 BASS BOOST switch As this unit accepts speakers with a minimum impedance of 2 ohms, connect speakers with 2-ohm or higher impedance to these terminals. 2CAUTION NOTE 2 3 4 LEFT R 0.3 5 0.3 1 INFRASONIC 2 3 4 0.5 150 70 L 1 70 50 1 0.5 150 10 SPEAKER LEVEL INPUT LINE IN 120 INFRASONIC Genuine-accessory car stereo (No line output center unit etc.) Power indicator Do not use this terminal for power source grounding. This unit will be damaged if the power source grounding wire is connected to this terminal. @ LINE IN terminal # Speaker level input terminals A center unit with no RCA output can still be connected to the speaker output. Again, even without a power control signal, the power is switched ON/OFF automatically by the speaker signal. 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. • A speaker wire may be short-circuited. • A speaker output may be in contact with the ground. • When the internal temperature is high and unit won’t operate. • The sigma servo connection may be erroneous. • The fuse of this unit may be blown. • The unit may be malfunctioning and sending DC signal to the speaker output. • The grounding wire of this unit may not be connected with a metallic part which is electrically connected with the negative terminal of the battery. • The power control wire may not be connected to this unit. • The grounding wire of the centre unit (cassette receiver, CD receiver, etc.) may not be connected with a metallic part which is electrically connected with the negative terminal of the battery. ■ 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. Sigma servo feed back The sound reproduced through conventional amplifiers is distorted due to the counterelectromotive force produced in the oscillating system of the speaker. The counterelectromotive force is particularly high with the woofer which requires a large drive mass.The sigma servo connection reduces distortion caused by the counterelectromotive force by including the circuit up to the speaker terminals in the negative feedback loop. This makes it possible to drive speakers with more fidelity to the input signals and create a sharp bass sound image with few feeling of noise interference. NOTE Speaker RCA cable* The speaker wires and sigma servo wires should be distributed along the same paths. 2CAUTION # ! K EA T SP LEF D GN 15Hz OFF 6dB 25Hz OFF 12dB BASS BOOST 100 0.5 150 170 L 50 2 3 4 200 LPF FREQUENCY(Hz) VE PU IN L IGHT R T LEFT RIGHT R 0.3 1 70 LE SPEAKER LEVEL INPUT LINE IN 120 INFRASONIC ER GND 5 SUBWOOFER AMPLIFIER 0.2 INPUT SENSITIVITY(V) ACC Power control wire* Car fuse box Battery • The extension of the negative feedback loop to include the speaker terminals makes it necessary to connect the sigma servo terminals correctly. Incorrect connection may result in sound degradation or other malfunction. If sound is not reproduced normally, check the connection of the sigma servo terminals, etc. • If the Sigma servo terminals are not connected, the sound may fluctuate or noise may occur. Be sure to connect the Sigma servo terminals correctly. • When connecting speakers in a parallel configuration, use speakers with an impedance of 4 ohms or more. Connecting speakers with smaller impedance than 4 ohms will cause malfunction. • The rated input of the speakers connected to this unit should be no less than the maximum output of the amplifier. Otherwise malfunction may result. Be specially careful in this when connecting speakers in a parallel configuration. ■ Basic sigma servo connection Lead terminal* Lead terminal* 4 VO ER 56 SP FUSE (30A) 30 POWER IN BATT ∑ SERVO II GND ■ Series connection SPEAKER OUTPUT P.CON(REMOTE) ∑ SERVO II VO ER E E AK II ∑S R OU TP UT II ∑S 2CAUTION Make this wire as short as possible. 2 3 ■ Parallel connection (2) ■ Parallel connection (1) Subwoofer Terminal cover Distribute the speaker wires and sigma servo wires along the same paths. Ground wire* Battery wire* Protective Fuse* + - Battery ■ Speaker level input terminals (#) 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(REMOTE) terminal. 2CAUTION • 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 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. 2CAUTION The speaker wires connected to this unit should be thick enough to supply the current capacity of two speakers. 2CAUTION This connection is possible only when the speakers are identical and the speaker wires are also of the same type and length. ■ Simplified sigma servo connection In case any of the connection examples above cannot be used or if the speakers cannot be connected to the speaker terminals, connect them to this unit as shown in the figure.
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