KS-AX4504
KS-AX4302
POWER AMPLIFIER: INSTRUCTIONS
AMPLIFICATEUR DE PUISSANCE: MANUEL D’INSTRUCTIONS
0107MNMMDWTKC
EN, FR
© 2007 Victor Company of Japan, Limited
LVT1696-001A
[J/E/U]
TERMINAL CONNECTIONS
ENGLISH
When making the terminal connections…
1
2
Peel the insulating vinyl cover of a cord 7 mm (5/16 in.) to 10 mm
(7/16 in.) long and expose the inside conductor.
Loosen the hex screw in a terminal with a provided hex wrench
and insert the conductor into the terminal. Then fix the hex screw
again to secure the conductor.
Note
• The exposed conductor should be 7 mm (5/16 in.) to 10 mm (7/16 in.) long.
– If shorter, it may cause a poor conductivity.
– If longer, it may cause a short circuit.
• Use a proper hex wrench for each terminal.
– 4 mm: +B terminal and GND terminal
– 3 mm: Speaker terminals of KS-AX4302 and REM terminal
– 2 mm: Speaker terminals of KS-AX4504
Thank 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.
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.
POWER SUPPLY
CAUTIONS AND NOTES
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 please comply with the following:
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 terminals 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.
• Be sure to leave an appropriate space between the antenna (aerial) and the wires of this unit.
• When replacing the fuse, only use a 25 A fuse for KS-AX4504 or a 20 A fuse for KS-AX4302.
• 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.
• This unit becomes very hot. Be careful not to touch the unit not only when using but for a while
after using.
DO NOT disassemble the units since there are no user serviceable parts inside.
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.
Model No.
Serial No.
CAUTION
INSTALLATION
To prevent short circuits while making connections, keep the battery’s negative terminal
disconnected.
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.
A
• When using a power cord (purchased separately), be sure to place the 30 A fuse near the
battery as shown.
• Connect the lead wire (power cord) through which power is supplied directly to the battery’s
“ª” terminal only after all the other connections have been made.
B
The proper lead wire 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.)
Logo Plate (detachable)
• If you have any questions regarding the thickness of the power cord, etc., consult your nearest
“JVC IN-CAR ENTERTAINMENT” car audio dealer.
a When you use JVC car receiver with a remote lead, connect to the REM terminal on this
unit.
b When you connect a unit 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 on or off the car receiver along with the on/off operation of the ignition switch.
If the POWER/PROTECTOR lamp lights in red, it indicates incorrect speaker wiring or
connections (see "TROUBLESHOOTING" on page 3). Make sure to correct speaker wiring and
other connections.
SPEAKER SYSTEMS
A Mount this unit on a firm surface, such as in the trunk room 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.
This amplifier provides two types of speaker connections: Normal Mode and Bridge Mode. You
can choose either type of connections depending on the speakers configuration equipped on
your car.
Make sure to comply with the following notes:
• Be sure not to connect the “·” terminals of the speakers to a common point.
• If the ground wire is common to both left/right and front/rear speaker wirings, this unit cannot be
used. Always use the independent lead wires for the speakers to be used. 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.
B 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 parts inside it.
• 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.
• To detach and rotate the Logo Plate 180 degrees, use the provided hex wrench (3 mm).
The proper lead wire connected to each SPEAKER OUTPUT terminal is as follows.
• KS-AX4504: AWG 18 to AWG 12 (The cross section is about 0.8 mm2 to 3.3 mm2.)
• KS-AX4302: AWG 18 to AWG 8 (The cross section is about 0.8 mm2 to 8 mm2.)
For KS-AX4504:
When you connect 4 speakers to the unit, down mixed signals (front and rear) are emitted
through the PRE OUT jacks.
For KS-AX4302:
Incoming signals are emitted through the PRE OUT jacks.
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SPEAKER CONNECTIONS
å When your receiver is equipped with Line Output, connect the Line Output (through the
receiver) to the INPUT jacks on this unit.
∫ When your receiver is NOT equipped with Line Output, connect the provided speaker
input connector (through the receiver) to the HIGH INPUT terminal on this unit.
Connection varies depending on the number of the speakers used in your car. Select the
appropriate connection referring to the following diagrams.
Before connecting: Securely connect all the parts. If the connections are loose, due to contact
resistance etc., heat will break out and may cause an accident. Secure and cover the cords with
insulating tape and run them under the car mats.
KS-AX4504
KS-AX4302
4-speaker system
2-speaker system
Subwoofer system—Bridge Mode*2
2-speaker system plus subwoofer—Bridge Mode*2
Subwoofer
Subwoofer
2-speaker system (2 amplifiers)—Bridge Mode*2
2-speaker system—Bridge Mode*2
4-speaker system plus subwoofer (PRE OUT)
Down mixed signals are emitted through PRE OUT jacks.
2-speaker system plus subwoofer (PRE OUT)
JVC power amplifier:
KS-AX4302, etc.
JVC power amplifier:
KS-AX4302, etc.
*12
*
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*3
Not provided for this unit.
Bridge Mode: Be sure to connect the line output from the receiver to the left (L) jack on this
unit.
Be sure to connect the both leads to the target speaker lead.
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KS-AX4302 (For U.S.A)
TROUBLESHOOTING
2-speaker system plus subwoofer (1 amplifier)
For more details, consult your “JVC IN-CAR ENTERTAINMENT” car audio dealer.
The minimum impedance should be 4 Ω for each of left and right speakers, and the
subwoofer.
The POWER/PROTECTOR lamp 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.
• Use a relay if your system employs too many amplifiers.
• Confirm the battery voltage (11 V to 16 V).
The POWER/PROTECTOR lamp lights in red and/or the unit heats up abnormally.
• Use the speakers of suitable impedance.
• Correct the speaker wirings if they are short-circuited.
• Leave the unit turned off for a while to cool it down.
No sound is heard.
• Confirm the connections for power supply (see "POWER SUPPLY" on page 1).
• Connect RCA pin cords to the INPUT jacks, or the speaker input connector to the HIGH INPUT
terminal.
Alternator noise is heard.
• Keep the power cords 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 negative speaker leads do not touch the car chassis.
• Replace the plugs or use plugs with load resistors.
• Connect a bypass capacitor across the accessory switches (horn, fan, etc.).
Noise is made when you connect the unit to an AM (MW/LW) tuner.
• Move the speaker and power cords away from the antenna (aerial) lead.
Subwoofer
*12 Not provided for this unit.
*3 Bridge wiring
*4 Use a High-pass crossover (not provided).
* Use a Low-pass crossover (not provided).
CONTROLS
SPECIFICATIONS
Power Output
Signal-to-Noise Ratio
KS-AX4504: 65 W RMS x 4 channels at 4 Ω and ≤ 1% THD + N
KS-AX4302: 100 W RMS x 2 channels at 4 Ω and ≤ 1% THD + N
80 dBA (reference: 1 W into 4 Ω)
KS-AX4504
Maximum Power Output
Load Impedance
Frequency Response
Input Sensitivity/Impedance
Distortion
Power Requirement
Grounding system
Dimensions (W×H×D)
Mass (approx.)
Accessories
KS-AX4302
600 W
4 Ω (2 Ω to 8 Ω allowance)
4 Ω (4 Ω to 8 Ω allowance) (Bridge Mode)
5 Hz to 50,000 Hz* (+0, –3 dB)
* Subsonic filter limits extremely low frequency signals less than
20 Hz.
2 V/45 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
300 mm × 63 mm × 265 mm (11-13/16 in. × 2-1/2 in. × 10-7/16 in.)
3.8 kg (8.4 lbs.)
Speaker input connector
KS-AX4504: 8P × 1
KS-AX4302: 4P × 1
Mounting Screw (φ 4 × 20 mm (13/16 in.)) × 4
Hex wrench
4 mm × 1
3 mm × 1
2 mm × 1 (KS-AX4504 only)
Design and specifications are subject to change without notice.
Power lndicator
The blue lamp illuminates while the unit is turned on.
Information for Users on Disposal of Old Equipment
POWER/PROTECTOR lamp
The lamp lights in green while the unit is turned on. When the lamp does not light or lights in
red with the unit on, it indicates there may be any trouble (see "TROUBLESHOOTING").
This symbol indicates that the product with this symbol should not be
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.
BASS BOOST controller
Turning this boosts the 45 Hz frequency within the range of 0 dB to +12 dB. Adjust the level
while listening to the sound. This control is preset to MIN when the unit is shipped.
Input LEVEL controller
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.
This symbol is only valid in the European Union.
CROSSOVER filter switch
OFF: Normally, set to this position. The switch is preset to this position when the unit is
shipped.
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 the cutoff frequency).
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 the cutoff frequency).
CROSSOVER frequency controller
Turning this adjusts the cutoff frequency within the range of 50 Hz to 400 Hz. Adjust the level
while listening to the sound. This control is preset to 50 Hz when the unit is shipped.
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 Technology Centre Europe GmbH
Postfach 10 05 52
61145 Friedberg
Germany
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