JVC Stereo Amplifier KS AX3002 User Manual

KS-AX3004  
KS-AX3002  
POWER AMPLIFIER: INSTRUCTIONS  
AMPLIFICATEUR DE PUISSANCE: MANUEL D’INSTRUCTIONS  
0508MNMMDWTKC  
EN, FR  
© 2008 Victor Company of Japan, Limited  
LVT1908-001A  
[J/E/U/US]  
POWER SUPPLY  
ENGLISH  
* Not provided  
KS-AX3004  
KS-AX3002  
ank you for purchasing a JVC product. Please read all instructions carefully before operation, to ensure  
your complete understanding and to obtain the best possible performance from the unit.  
To metallic body or chassis  
Remote turn-on line  
For safety....  
• Do not raise the volume level too much, as this will block outside sounds, making driving dangerous.  
• Stop the car before performing any complicated operations.  
25 A fuse  
(To an accessory terminal)  
CAUTIONS AND NOTES  
JVC car receiver, etc.  
This unit is designed to operate on 12 V DC, NEGATIVE ground electrical systems.  
• This unit uses BTL (Balanced Transformerless) amplifier circuitry, i.e., floating ground system,  
so comply with the following:  
Ignition switch  
Car battery  
– Do not connect the “·” terminals of the speakers to each other.  
– Do not connect the “·” terminals of the speakers to the metal body or chassis.  
• Cover the unused leads with insulating tape to prevent them from short circuiting.  
• When an extension lead is used, it should be as thick and short as possible; connect it firmly  
with insulating tape.  
Caution  
To prevent short circuits while making connections, keep the battery’s negative terminal  
disconnected.  
• Be sure to leave an appropriate space between the antenna (aerial) and the wires of this unit.  
• When replacing the fuse, only use 25 A fuses.  
• Do not let pebbles, sand or metallic objects get inside the unit.  
To keep the heat dissipation mechanism running effectively, wipe the accumulated dust off  
periodically.  
• Listening to the tape, radio, CD or digital audio player, etc. with the volume set at a high level for  
a long period of time will exhaust the battery, while the engine is turned off or while the engine  
is idling.  
1 Remote turn-on line (not provided)  
a When you use a JVC car receiver with a remote lead, connect to the remote lead.  
b When you use a car receiver without a remote lead, connect to the accessory circuit of  
the car which is activated by the ignition switch. In this case, noise may occur when the car  
receiver is turned on or off. To avoid this noise, do not turn on or off the car receiver itself.  
You can turn it on or off along with the on/off operation of the ignition switch.  
2 Ground lead (not provided)  
• This unit becomes very hot. Be careful not to touch the unit not only when using but after using.  
DO NOT disassemble the unit since there are no user serviceable parts inside.  
3 Power cord (not provided)  
• When using a power cord, add a 25 A fuse near the battery as shown.  
• Connect to the battery’s “ª” terminal only after all the other connections have been made.  
For Customer Use: Enter below the Model No. and Serial No. which are located on the top or  
bottom of the cabinet. Retain this information for future reference.  
The proper lead connected to each POWER terminal is as follows:  
+ B and GND: AWG 8 to AWG 4 (The cross section is about 8 mm2 to 21 mm2.)  
REM: AWG 18 to AWG 8 (The cross section is about 0.8 mm2 to 8 mm2.)  
Model No.  
Serial No.  
INSTALLATION  
• Use ring terminals (not provided) for secure connection.  
The following illustration shows a typical installation. However, you should make adjustments  
corresponding to your specific car. If you have any questions or require information regarding  
installation kits, consult your “JVC IN-CAR ENTERTAINMENT” car audio dealer or a company  
supplying the kits.  
If you have any questions regarding the thickness of the power cord, etc., consult your nearest  
“JVC IN-CAR ENTERTAINMENT” car audio dealer.  
Å
TERMINAL CONNECTIONS  
When making terminal connections, properly fix each terminal with the  
provided screw by turning it as illustrated.  
• Use ring terminals (not provided) for secure connection.  
Notes  
• Make sure the screw is fixed in place to prevent disconnections.  
• Avoid over-tightening as it may cause the damage to the screw or its  
head slot.  
Onto the trunk floor  
Under the front seat  
Mount this unit on a firm surface, such as in the trunk or under the front seat.  
• Since heat is generated in the unit, do not mount it near inflammable objects. In addition,  
mount it in an area that will not prevent the unit from dissipating the heat.  
• Do not mount the unit in the places subject to heat: near a radiator, in a glove compartment  
or in insulated areas such as under a car mat that will prevent the unit from dissipating heat.  
• When mounting the unit under the front seat, make sure that adjusting the seat position will  
not catch any wire of the unit.  
SPEAKER SYSTEMS  
This amplifier provides two types of speaker connections: Normal Mode and Bridge Mode  
connections.  
You can choose either type depending on the speakers equipped on your car.  
ı
Provided screw  
φ 4 × 20 mm ( /16 in.)  
Notes  
13  
• Be sure not to connect the “·” terminals of the speakers to a common point.  
• If the same lead is used for both left/right or front/rear speaker wirings, this unit cannot be used.  
Always use the independent leads for each speaker. In this case, redo the wirings.  
• Use the speakers with an impedance of 2 Ω to 8 Ω (4 Ω to 8 Ω: when used in Bridge Mode).  
• Use the speakers which have sufficient capacity to the unit.  
The proper lead connected to each SPEAKER OUTPUT terminal is AWG 18 to AWG 12 (The  
cross section is about 0.8 mm2 to 3.3 mm2).  
Drilled hole  
When mounting this unit, be sure to use the provided screws.  
• If any other screws are used, there is a risk of loosening the unit or damaging the parts under  
the car floor.  
• Before drilling holes in the trunk to install the unit, make sure that there is a sufficient space  
under the trunk so that you do not drill holes in the fuel tank, etc.  
1
 
TROUBLESHOOTING  
KS-AX3002 (for USA)  
For more details, consult your “JVC IN-CAR ENTERTAINMENT” car audio dealer.  
2-speaker system plus subwoofer (1 amplifier)  
The minimum impedance should be 4 Ω for each of left and right speakers, and the subwoofer.  
The POWER indicator does not light.  
• Change the fuses if the current one is blown.  
• Connect the ground lead securely to a metal part of the car.  
Turn on the equipment connected to this unit.  
• Confirm the battery voltage (11 V to 16 V).  
• Use a relay if your system employs too many amplifiers.  
• Leave the unit turned off to cool it down if it heats up abnormally.  
JVC car receiver, etc.  
Filter switch  
Line out  
No sound is heard.  
2
*
• Confirm the connections for the power supply (see "POWER SUPPLY" on page 1).  
• Connect the RCA pin cords to the INPUT jacks, or the speaker input connector to the HIGH  
INPUT terminal.  
• Confirm the speaker wirings and the position of the CROSSOVER filter switch (See “SPEAKER  
CONNECTIONS” on page 2).  
Alternator noise is heard.  
bSpeaker input connector  
• Keep the leads of the POWER terminals away from the RCA pin cords.  
• Keep the RCA pin cords away from other electrical cables in the car.  
• Connect the ground lead securely to a metal part of the car.  
• Make sure the speaker negative leads do not touch the car chassis.  
• Connect a bypass capacitor across the accessory switches (horn, fan, etc.).  
3
4
3
Connector lead  
Å White "LEFT (+)"  
To  
=
=
=
Receiver  
Left (+) lead  
Chassis*1  
*
*
*
ı Black "RECEIVER GND"  
Ç Gray "RIGHT (+)"  
Right (+) lead  
Subwoofer  
Right speaker  
Noise is made when you connect the unit to an AM (MW/LW) tuner.  
• Move all the leads of this unit away from the antenna (aerial) lead.  
Left speaker  
*1 See page 2.  
*2 RCA pin cords (not provided)  
SPECIFICATIONS  
*3 Use a High-pass crossover (not provided)  
*4 Use a Low-pass crossover (not provided)  
Power Output  
KS-AX3004:  
• Normal Mode: 60 W RMS x 4 channels at 4 Ω and 1% THD + N  
KS-AX3002:  
• Normal Mode: 65 W RMS x 2 channels at 4 Ω and 1% THD + N  
CONTROLS  
Signal-to-Noise Ratio  
76 dBA (reference: 1 W into 4 Ω)  
KS-AX3004  
Power Output  
KS-AX3004:  
• Normal Mode: 85 W RMS x 4 channels at 2 Ω and 1% THD + N  
• Bridge Mode: 120 W RMS x 2 channels at 4 Ω and 1% THD + N  
KS-AX3002:  
• Normal Mode: 90 W RMS x 2 channels at 2 Ω and 1% THD + N  
• Bridge Mode: 130 W RMS x 1 channel at 4 Ω and 1% THD + N  
Maximum Power Output  
Load Impedance  
KS-AX3004: 680 W (340 W x 2)  
KS-AX3002: 370 W  
• Normal Mode: 4 Ω (2 Ω to 8 Ω allowance)  
• Bridge Mode: 4 Ω (4 Ω to 8 Ω allowance)  
KS-AX3002  
Frequency Response  
Input Sensitivity/Impedance  
Distortion  
5 Hz to 50,000 Hz (+0 dB, –3 dB)  
2 V/12 kΩ (0.3 V to 6 V, variable)  
Less than 0.04% (at 1 kHz)  
DC 14.4 V (11 V to 16 V allowance)  
Negative ground  
Power Requirement  
Grounding system  
3
3
5
Dimensions (W×H×D)  
KS-AX3004: 212 mm × 333 mm × 50 mm (8- /8 in. × 12- /8 in. × 2 in.)  
3
KS-AX3002: 212 mm × 196 mm × 50 mm (8- /8 in. × 7- /4 in. × 2 in.)  
Mass (approx.)  
Accessories  
KS-AX3004: 3.37 kg (7.42 lbs.)  
KS-AX3002: 1.94 kg (4.27 lbs.)  
Å POWER indicator  
Speaker input connector 6P × 1  
Mounting Screw φ 4 × 20 mm ( /16 in.) × 4  
13  
The green lamp lights while the unit is turned on.  
ı CROSSOVER filter switch  
OFF: Normally set to this position. The switch is preset to this position when the unit is  
shipped.  
Design and specifications are subject to change without notice.  
LPF: Set to this position when you want to turn on the LPF (Low-Pass Filter) switch. The  
Low-Pass Filter transmits frequencies lower than 80 Hz.  
HPF: Set to this position when you want to turn on the HPF (High-Pass Filter) switch. The  
High-Pass Filter transmits frequencies higher than 150 Hz.  
Information for Users on Disposal of Old Equipment  
Ç Input LEVEL controller  
This symbol indicates that the product with this symbol should not be  
The input level can be adjusted with this control when this unit is connected to other source  
equipment. Adjust the level while listening to the sound. This control is preset to MIN when the  
unit is shipped.  
disposed as general household waste at its end-of-life. If you wish to  
dispose of this product, please do so in accordance with applicable national  
legislation or other rules in your country and municipality. By disposing of  
this product correctly, you will help to conserve natural resources and will  
help prevent potential negative effects on the environment and human  
health.  
This symbol is only valid in the European Union.  
Dear Customer,  
This apparatus is in conformance with the valid European directives and standards regarding  
electromagnetic compatibility and electrical safety.  
European representative of Victor Company of Japan, Limited is:  
JVC Technical Services Europe GmbH  
Postfach 10 05 04  
61145 Friedberg  
Germany  
3
 

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