Kenwood KAC-PS650D, KAC-X650D User Manual

KAC-X650D
KAC-PS650D

5-CHANNEL POWER AMPLIFIER 7 page 2-15

INSTRUCTION MANUAL

AMPLIFICATEUR DE PUISSANCE 5 CANAUX 7 page 16-29

MODE D’EMPLOI

AMPLIFICADOR DE POTENCIA DE 5 CANALES 7 página 30-43

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-X650D/PS650D Serial number

© PRINTED IN JAPAN B64-2270-00 (KM / EM)

Safety precautions

2WARNING

To prevent injury or fire, take the following
precautions:

• When extending the ignition, battery, or
ground wires, make sure to use automotive­grade wires or other wires with a 8mm
(AWG8) 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.

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.

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.

NOTE

This Class B digital apparatus complies with
Canadian ICES-003.

2

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.

2CAUTION

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.

Protection function

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 6)

Accessories

Part name

Self-tapping screws

(ø5 × 18 mm)

Terminal cover 2

Mounting Hardware 4

Hexagon socket head

cap screw (M3 × 8 mm)

Self-tapping screws

(ø3 × 8 mm)

Hexagon Wrench 1

External

View

Number of

Items

4

4

4

2 English

Installation

Self-tapping screw
(ø5 × 18 mm)

Hexagon socket
head cap screw
(M3 × 8 mm)

Terminal
cover

Hexagon
Wrench

Cooling fan : Air inlet

Exhaust outlet

Installation board, etc.
(thickness : 15 mm or more)

1.Install the installation fittings in the unit.

2.Attach the unit.

3.Install the terminal cover.

2CAUTION

• 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
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.

• This unit has cooling fans to decrease the internal temperature. Be careful not to block the
cooling fan openings when installing the unit. Blocking these openings will inhibit the cooling of
the internal temperature and result in malfunction.

• 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 screws
(ø3 × 8 mm)

Mounting
Hardware

English 3

Controls

MONO(Lch)STEREO

OPERATION

A.CH B.CHFILTER

A.CH HPF

FILTER FREQUENCY(Hz)

LPF

OFF

HPF

HPF

OFF

B.M.S.

+12dB

OFF

REMOTE

INPUT SELECTOR

GND

EXT.AMP.CONT.

LINE IN

L

R

L

R

ABSUB

BABA A SUB

200

50

B.CH HPF

200

50

B.CH LPF

200

50

SUB.CH LPF

200

50

MONO(Lch)STEREO

OPERATION

A.CH B.CHFILTER

A.CH HPF

FILTER FREQUENCY(Hz)

LPF

OFF

HPF

HPF

OFF

B.M.S.

+12dB

OFF

REMOTE

INPUT SELECTOR

BABA A SUB

200

50

B.CH HPF

200

50

B.CH LPF

200

50

SUB.CH LPF

200

50

8

0

9

1 4 653 72

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.

About D-class (SUB.CH)

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.)

8 INPUT SENSITIVITY control

(A.CH/B.CH/SUB.CH)

Adjust this control according to the pre-out
level of the center unit connected to this
amplifier.
The sensitivities of amplifiers A, B and SUB
can be adjusted independently regardless
of the position of the input selector switch.

NOTE

Refer to "Specifications" on the center
unit’s instruction manual about the pre-out
level.

5 OPERATION switch

This switch is used to select the operation
mode of the amplifier.
This setting is valid for both the amplifier A
and B.

• STEREO position:

• MONO (Lch) position:

The amplifier can be used as a stereo
amplifier.

Amplifies the signal input from the left side
only. Set to this position and make bridged
connections to use as a high-power

4 English

monaural amplifier. (The input right signal is
not output.)

1 FILTER switch (A.CH/B.CH)

This switch allows to apply high-pass or
low-pass filtering to the speaker outputs.

• HPF (High-Pass Filter) position:

The filter outputs the band of higher
frequencies than the frequency set with the
HPF FREQUENCY control.

•OFF position:

The entire bandwidth is output without
filtering.

• LPF (Low-Pass Filter) position: (B.CH
only)

The filter outputs the band of lower
frequencies than the frequency set with the
LPF FREQUENCY control.
The speaker output is automatically turned
monaural (L+R) and the bass boost function
is activated.

2 HPF FREQUENCY control

(A.CH/B.CH)

Sets the cutoff frequency when the FILTER
switch is set to HPF.

4 B.CH LPF FREQUENCY control

Sets the cutoff frequency when the FILTER
switch is set to LPF.

6 SUB.CH LPF FREQUENCY control

This control adjusts the frequency band
output from this amplifier SUB.

7 INPUT SELECTER switch

(AB/A)

This switch toggles the input signal of
amplifier B.

• AB position:

The input for terminal A is output from
amplifier A, while the input for terminal B is
output from amplifier B.

!

Removing the cover

Hexagon Wrench

Tighten

Loosen

•A position:

The input for terminal A is output from
amplifiers A and B.

(AB/SUB)

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.

• SUB position:

The input for the SUB terminal is output by
amplifier SUB.

3 B.M.S.(Bass management system)

switch

Bass boost centered on the frequency set
by the B.M.S. FREQUENCY control.
The B.M.S. only applies to the amplifier
SUB.

• +12 position:

Bass boost +12 dB

•OFF position:

Bass boost OFF

•REMOTE position:

Controls the B.M.S. from the Kenwood
center unit. (Refer to page 5)

0 B.M.S. FREQUENCY control

When the B.M.S. switch is set on "+12dB"/
"REMOTE" the emphasized center
frequency is adjusted.

9 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
blinking.

■ 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

Center unit
display

"Flat"/"OFF"/"1" Bass boost OFF (Flat)

"+6"/ "1"/ "2" Bass boost +6 dB
"+12"/ "2"/"3" Bass boost +12 dB
"+18"/ "3"/"4" Bass boost +18 dB

Setting

• Frequency offset

Center unit
display

"Normal" It is the B.M.S.

"Low" The central frequency is 20-

NOTE

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
"Frequency Offset".

Setting

FREQUENCY control
adjustment value.

30% low.

English 5

Indicator

!

■ Indicator !

You are notified of the unit’s condition and
malfunction (Protection function) by the
indicator.

• ON or color change in order.

When operation is normal

NOTE

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.

NOTE

The cause may be one of the below
times.

– 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
output.

NOTE

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.

6 English

MONO(Lch)STEREO

OPERATION

A.CH B.CHFILTER

A.CH HPF

FILTER FREQUENCY(Hz)

LPF

OFF

HPF

HPF

OFF

B.M.S.

+12dB

OFF

REMOTE

INPUT SELECTOR

GND

EXT.AMP.CONT.

LINE IN

L

R

L

R

ABSUB

BABA A SUB

200

50

B.CH HPF

200

50

B.CH LPF

200

50

SUB.CH LPF

200

50

30

30

SPEAKER
OUTPUT

POWER IN

P.CON

BATT.

GND

FU

S

E(

30A

x2

)

LEFT

BRIDGED

RIGHT SUB

SUB

A

B

&@#$% ^

*)(

Connection

■ Terminal names

@ Fuse (30 A × 2)
# Battery terminal
$ Ground terminal
^ Amplifier A/B speaker output

terminals

• Stereo Connections:

When you wish to use the unit as a stereo
amplifier, stereo connections are used.
The speakers to be connected should
have an impedance of 2Ω or greater.
When multiple speakers are to be
connected, ensure that the combined
impedance is 2Ω or greater for each
channel.

•Bridged Connections:

When you wish to use the unit as a high­output monaural amplifier, bridged
connections are used. (Make connections
to the LEFT channel 9 and the RIGHT
channel · SPEAKER OUTPUT terminals.)
The speakers to be connected should
have an impedance of 4Ω or greater.
When multiple speakers are to be
connected, ensure that the combined
impedance is 4Ω or greater.

2CAUTION

The rated input of the speakers should be no
less than the maximum output of the
amplifier. Otherwise malfunction may result.

& 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.

* RCA cable ground lead terminal

When using an RCA cable with a ground
lead attached, connect the ground lead to
this terminal.

( A.CH/B.CH/SUB.CH LINE IN

terminal

% Power control terminal

Controls the unit ON/OFF.

NOTE

Controls the unit power. Be sure to connect it
with all the systems.

) EXT.AMP.CONT. (external

amplifier control) terminal

Controls the B.M.S. Only Kenwood center
unit models sold in 1999 or later with a
"EXT.CONT."/"EXT.AMP.CONT." wire
attached can be used.
Also, a maximum of 3 power amplifiers can
be operated at the same time.

NOTE

There are cases when operation may not be
possible due to wiring wire type and length.

English 7

Connection

■ Installation procedure

Since there are large variety of settings and connections possible according to applications, read
the instruction manual well to select the proper setting and connection.

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 wires 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.

2CAUTION

• If sound is not output normally, immediately turn power off and check connections.

• 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 wires or connectors are touching the car body. Do not remove caps
from unconnected wires 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.

8 English

MONO(Lch)STEREO

OPERATION

A.CH B.CHFILTER

A.CH HPF

FILTER FREQUENCY(Hz)

LPF

OFF

HPF

HPF

OFF

B.M.S.

+12dB

OFF

REMOTE

INPUT SELECTOR

GND

EXT.AMP.CONT.

LINE IN

L

R

L

R

ABSUB

BABA A SUB

200

50

B.CH HPF

200

50

B.CH LPF

200

50

SUB.CH LPF

200

50

30

30

SPEAKER
OUTPUT

POWER IN

P.CON

BATT.

GND

F

U

S

E

(

30A

x2

)

LEFT

BRIDGED

RIGHT SUB

SUB

A

B

11 mm

P.CONT.

#$%

)

EXT.CONT.

■ Power wire connection

The connecting wire diameter*

• If solid wire: Ø0.4 (AWG 26) – Ø1.2 (AWG 16)

• If multi strand wire: Ø0.4 (AWG 26) – Ø1.2 (AWG 16)

External amplifier control
wire (Pink / Black)
(Refer to page 7)

CENTER UNIT

(CD receiver, etc.)

Lead terminal*

Battery wire*

Protective Fuse*

Ground wire*

Battery

Extension wire*

Power control wire
(Blue/ White)

* : Commercially available parts

2WARNING

To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery’s
positive terminal.

Wiring

•Take the battery wire for this unit directly from the battery. If it's connected to the vehicle’s
wiring harness, it can cause blown fuses etc.

• 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 install a protective fuse in the power cord near the battery. The protective fuse
should be the same capacity as the unit’s fuse capacity or somewhat larger.

• For the power cord and ground, use a vehicle type (fireproof) power wring cord with a current
capacity greater than the unit’s fuse capacity. (Use a power wiring cord with a diameter of 8

2

mm

(AWG 8) or greater.)

•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.

EXT.AMP.CONT. (external amplifier control) terminal )

1. Peel the cladding of wire for a length of 11mm from the end.

2. While pressing the lock release button with a slotted screwdriver, insert the wire.

English 9

MONO(Lch)STEREO

OPERATION

A.CH B.CHFILTER

A.CH HPF

FILTER FREQUENCY(Hz)

LPF

OFF

HPF

HPF

OFF

B.M.S.

+12dB

OFF

REMOTE

INPUT SELECTOR

GND

EXT.AMP.CONT.

LINE IN

L

R

L

R

ABSUB

BABA A SUB

200

50

B.CH HPF

200

50

B.CH LPF

200

50

SUB.CH LPF

200

50

(

(

*

Connection

■ RCA cable connection

* : Commercially available parts

RCA cable ground terminal

Left input

CENTER UNIT

(CD receiver, etc.)

Right input

RCA cable*

■ 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.

• The impedance of the speakers that are going to be connected should be 2Ω or greater (for
stereo connections, amplifier SUB), or 4Ω 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.

10 English

4 Ω

2Ω

4Ω

8Ω 8Ω

2Ω

4 Ω

Combined impedance

4 Ω

4Ω4Ω4Ω

30

30

SPEAKER
OUTPUT

POWER IN

P.CON

BATT.

GND

FU

S

E

(

30A

x2

)

LEFT

BRIDGED

RIGHT SUB

SUB

A

B

30

30

SPEAKER
OUTPUT

POWER IN

P.CON

BATT.

GND

F

U

S

E(

30A

x2

)

LEFT

BRIDGED

RIGHT SUB

SUB

A

B

^

^

&

&

^

^

■ Speaker wire connection

Lead terminal*

(Stereo Connections)

Front Left
speaker

Front Right
speaker

Subwoofer
(L + R)

Rear Right
speaker

Rear Left
speaker

(Bridged Connections)

Left speaker (Bridged)

Subwoofer
(L + R)

Right speaker (Bridged)

English 11

System examples

L

R

L

R

L

R

L

R

L

R

A

B

SUB

B

A

SUB

L

R

L

R

B

A

SUB

A.CH B.CHFILTER

LPF

OFF

HPF

HPF

OFF

1

A.CH B.CHFILTER

LPF

OFF

HPF

HPF

OFF

1

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

L

R

L

R

L

R

A

B

SUB

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

L

R

L

R

L

R

A

B

SUB

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

L

R

L

R

L

R

A

B

SUB

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

L

R

L

R

L

R

A

B

SUB

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

L

R

L

R

L

R

L

R

L

R

A

B

SUB

B

A

SUB

A.CH B.CHFILTER

LPF

OFF

HPF

HPF

OFF

1

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

L

R

L

R

L

R

A

B

SUB

MONO(Lch)STEREO

OPERATION

INPUT SELECTOR

BABA A SUB

57

■ 5-channel system

(1)

CENTER UNIT

■ 3-channel system

■ 4-channel system

12 English

(2)

(3)

(1)

(2)

(1)

(2)

CENTER UNIT

CENTER UNIT

CENTER UNIT

CENTER UNIT

CENTER UNIT

CENTER UNIT

Front Left speaker
Front Right speaker

Rear Left speaker
Rear Right speaker

Subwoofer
(L + R)

Left speaker (Bridged)

Right speaker (Bridged)

Subwoofer
(L + R)

Tweeter

Woofer

Subwoofer

■ Tri-mode

Refer to 5-channel system

1

A.CH B.CHFILTER

HPF

OFF

HPF

OFF

LPF

A

B

SUB

L

R

L

R

C

(High pass)

C

C

(High pass)

C

Subwoofer

L

L

Subwoofer
(L + R) (Bridged)

Subwoofer
(L + R) (Bridged)

●Principle of Tri-mode

Method of frequency band division using a coil and capacitor…in case of 6dB/oct. slope

Coil (L): Passes low frequencies and blocks high

frequencies. (Low pass)

Capacitor (C): Passes high frequencies and blocks low

frequencies. (High pass)

159000

C= (µF)

fc x R

159 x R

L= (mH)

fc

fc=Cut of Frequency (Hz)
R=Speaker Impedance (Ω)

0 dB

-3 dB

Crossover Frequency

L

C

Frequency

●Example:

When it is required to set a crossover frequency of 120 Hz using speakers with an
impedance of 4 ohms.

Prepare commercially-available coil and capacitor with the closest ratings to the results
calculated from the formula above. The capacitor rating should be as close as possible to 331.25
(µF) and the coil rating should be as close as possible to 5.3 (mH).

2CAUTION

• If you wish to bridge-connect a speaker, the speaker impedance must be no less than 4 ohms.
Connecting a speaker with an impedance lower than 4 ohms may damage the unit.

• Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to
do so will result in a drop of the combined impedance with the subwoofer.

• Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are
sufficient.

English 13

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.
(No sound from one side.)

(Blown fuse.)

• Input (or output) cables are
disconnected.

• Protection circuit may be
activated.

• Volume is too high.

• The speaker cord is shorted.

• Connect the input (or output)
cables.

• Check connections by referring
to "Indicator".

• Replace the fuse and use lower
volume.

• After check the speaker cord and
fixing the cause of the short,
replace the fuse.

The output level is too
small (or too large).

The sound quality is bad.
(The sound is distorted.)

The external amplifier
controller (B.M.S.) will not
work.

The input sensitivity adjusting
control is not set to the correct
position.

• The speakers wire are
connected with wrong + / ­polarity.

•A speaker wire is pinched by a
screw in the car body.

• The switches may be set
improperly.

• The B.M.S. switch setting is
incorrect.

• The external amplifier control
wire has come loose.

Adjust the control correctly
referring to “Controls”.

• 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 "System examples".

• The B.M.S. switch is set to
"REMOTE".

• Check that the external amplifier
control wire is properly
connected.

14 English