© PRINTED IN JAPAN B64-2274-00 (KM / EM)
MONO POWER AMPLIFIER
7 page 2-11
AMPLIFICATEUR DE PUISSANCE MONAURAL
7 page 12-21
AMPLIFICADOR DE POTENCIA MONOFONICO
7 página 22-31
MANUAL DE INSTRUCCIONES
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-X810D/PS810D Serial number
To prevent injury or fire, take the following
·When extending the ignition, battery, or
ground wires, make sure to use automotive-
grade wires or other wires with a 14 mm2
(AWG6) 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.
To prevent damage to the machine, take the
· Be sure the unit is connected to a 12V DC
power supply with a negative ground
· Do not open the top or bottom covers of the
· 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
· To prevent a short circuit when replacing a
fuse, first disconnect the wiring harness.
· If you experience problems during
installation, consult your Kenwood dealer.
· If the unit does not seem to be working right,
consult your Kenwood dealer.
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.
This Class B digital apparatus complies with
Cleaning the unit
If the front panel gets dirty, turn off the power
and wipe the panel with a dry silicon cloth or
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.
To prevent batter rise
When the unit is used in the ACC ON position
without turning the engine ON, it depletes the
battery. Use it after starting the engine.
There is a Protection function installed in the
unit to protect the unit and speakers from
various problems. When Protection operates,
the indicator informs you of the condition.
(Refer to page 5)
(ø5 × 18 mm)
Hexagon socket head
cap screw (M3 × 8 mm)
(ø3 × 8 mm)
1. Install the installation fittings in the unit.
2. Attach the unit.
3. Install the terminal cover.
· Do not install in the below locations;
(Unstable location, In a location that interferes with driving, In a location that gets wet, In a
dusty location, In a place that gets hot, In a place that gets direct sunlight, In a location that
gets hit by hot air)
· Do not install the unit under the carpet. Otherwise heat build-up occurs and the unit may be
· 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.
Installation board, etc.
(thickness : 15 mm or more)
(ø5 × 18 mm)
head cap screw
(M3 × 8 mm)
(ø3 × 8 mm)
Controls / Indicator
A D-class amplifier uses an inaudible
frequency as a switching pulse to change
the pulse width to represent the music
signal. (Pulse Width Modulation: P.W.M.)
5 INPUT SENSITIVITY control
Adjust this control according to the pre-out
level of the center unit connected to this
Refer to "Specifications" on the center
unit's instruction manual about the pre-out
8 LPF(Low-Pass Filter) FREQUENCY
This control adjusts the frequency band
output from this unit.
2 BAND REJECT filter switch
When this switch is set to "-6dB"/"-12dB",
frequencies in the band set with the B.R.F.
FREQUENCY control are rejected and
eliminated. The band rejection allows to
reduce resonance inside the vehicle
compartment and standing waves. (page 6)
9 B.R.F. FREQUENCY control
Sets the rejection frequency when the
BAND REJECT switch is set to "-6dB"/"-
12dB". (page 6)
4 INFRASONIC switch
When this switch is set to "ON", the
inaudible, ultralow frequencies below the
frequency set with the 15Hz/25Hz switch
are cut off. This improves the reproduction
performance of the speakers by eliminating
unnecessary oscillations which will not
Switches the cutoff frequency when the
OFF/ON switch is set to "ON".
3 PHASE switch
When this switch is set "REVERSE"
(Reverse: 180°) the speaker output phase is
1 B.M.S.(Bass management system)
Bass boost centered on the frequency set
by the B.M.S. FREQUENCY control.
· +12 position:
Bass boost +12 dB
Bass boost OFF
Controls the B.M.S. from the Kenwood
center unit. (Refer to page 5)
6 B.M.S. FREQUENCY control
When the B.M.S. switch is set on "+12dB"/
"REMOTE" the emphasized center
frequency is adjusted.
7 V-COLOR (Variable color) button
Select the ON color for the indicator.
Every time the button is pressed, 7 fixed
colors and the variable color change.
The color can't be set when the indicator is
Controlling the B.M.S. from the
Kenwood center unit
(B.M.S. : Bass management system)
When the B.M.S. switch is set in the
remote position, the bass boost amount
and frequency offset can be controlled from
the center unit.
· Bass boost
"Flat"/ "OFF"/ "1"
Bass boost OFF (Flat)
Bass boost +6 dB
Bass boost +12 dB
Bass boost +18 dB
· Frequency offset
It is the B.M.S.
The central frequency is 20-
For the center unit control method and
setting display, refer to the Instruction
Manual for the center unit.
There may be cases when the center unit
can't set the "Bass boost +18dB" or
You are notified of the unit's condition and
malfunction (Protection function) by the
·ON or color change in order.
When operation is normal
The color you want can be selected with
the variable color button.
· The color blinks blue
When during operation
When the center unit/B.M.S. switch
controls the B.M.S.
· The color blinks yellow
When the power voltage is less than 11V.
The cause may be one of the below
When the vehicle battery is weak.
When the battery capacity is low.
When the battery cord is worn.
When the battery wire is too small or too
long and can't supply enough current.
· The color blinks purple
When the unit has failed and direct current
voltage is generated to the speaker's
Turn the power OFF and release the
protection. If the indicator doesn't quit
blinking, contact your Kenwood dealer.
· The color blinks red
When the inside of the unit is overheating.
· The color blinks green
When the speaker cord is shorted.
When the speaker output is in contact
with the vehicle ground.
Removing the cover