Kenwood KAC-PS401M User manual

KAC-PS401M
© B64-1441-00 (EM)
MONO POWER AMPLIFIER
INSTRUCTION MANUAL

2 English
Safety precautions
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 cables of the
units.
4.Connect the speaker cables and sigma servo
feed back cables.
5.Connect the power cable, power control
cable and grounding cable following this
order.
6.Install the unit in the car.
7.Connect the negative -terminal of the
battery.
• 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 cables 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.
2CAUTION
To prevent injury or fire, take the following
precautions:
• When extending the ignition, battery, or
ground cables, make sure to use automotive-
grade cables or other cables with a 5mm2
(AWG10) or more to prevent cable
deterioration and damage to the cable
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
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.
• If you experience problems during
installation, consult your Kenwood dealer.
• If the unit does not seem to be working right,
consult your Kenwood dealer.
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.
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.
Accessories
2CAUTION
NOTE
2CAUTION
2WARNING
Part name Number of
Items
External
View
Terminal cover
(Power terminal) 1
Self-tapping screws
(ø5 ×18 mm) 4

English 3
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.
• Use the extension cables. (Optional.)
• 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.
2CAUTION
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Installation board, etc.
(thickness : 15 mm or more)
Self-tapping screw
CA-2SL CA-12SL CA-22SL CA-52SLRCA cable
CA-3WL CA-13WL CA-23WL CA-53WLRCA cable (ø7mm)
CA-5W CA-15W CA-25W CA-45W CA-65WRCA cable (ø12mm)
0.5m 1m 2m 4m 5m 6m
Type Length
Cooling fan
Air inlet
Air inlet
Installation procedure
• Connect the speaker cables to appropriate
speaker connectors separately. Sharing the
negative cable of the speaker or grounding
speaker cables 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.

4 English
Controls
L L
R
R
OUTLINE IN
P.CONGND EXT.AMP.CONT.
30
15 20 25 ON
OFF ON OFF ON OFF
INFRASONIC BAND
REJECT LPF
FREQ (Hz) B.M.S.
B.M.S.
(
+ 6)B.M.S.
(REMOTE)
CLOSE
OPEN/
SPEAKER OUTPUT
FUSE(15A×4 )
–+
–+
BATT.
GND
15 15 15 15
SERVO II
FEED BACK
∑
1 4 52 3
67 890
30
15 20 25 ON
OFF ON OFF ON OFF
INFRASONIC BAND
REJECT LPF
FREQ (Hz)
(MIN) (MAX)
5
4
32
1
0.5
0.2
50 40200 200
INPUT
SENSITIVITY
B.R.F.
FREQUENCY
LO PASS
FREQUENCY
&$^@
#
!
%
0.5
1 Fuse (15 A × 4)
2 Battery terminal
3 Ground terminal
4 SPEAKER OUTPUT terminals
As this unit accepts speakers with a
minimum impedance of 2 ohms, connect
speakers with 2-ohm or higher impedance
to these terminals.
The rated input of the speakers should be
no less than the maximum output of the
amplifier. Otherwise malfunction may
result.
5 SIGMA SERVO FEED BACK
terminals (See p.11)
Be sure to make proper connections to the
SIGMA SERVO FEED BACK terminals.
Incorrect connection may result in lack of
sound output or other malfunctions.
6 RCA cable ground lead terminal
7 LINE IN terminal
8 LINE OUT terminal
9 Power control terminal
0 EXT.AMP.CONT. (external
amplifier control) terminal
This controls the B.M.S. (See P.6).
! INPUT SENSITIVITY control
Adjust this control according to the pre-out
level of the centre unit connected to this
amplifier.
Refer to “Specifications” on the centre
unit’s instruction manual about the pre-out
level.
@ Low Pass Filter switch
When this switch is set to ON, the bass is
boosted because the frequencies of the
lower frequency band than the cutoff
frequency set with the LPF FREQUENCY
control are output.
# LPF FREQUENCY control
Sets the cutoff frequency when the FILTER
switch is set to LPF.
$ BAND REJECT filter switch
When this switch is set to ON, frequencies
in the band set with the BAND REJECT
FREQUENCY control are rejected and
eliminated. The band rejection allows to
reduce resonance inside the vehicle
compartment and standing waves. (See
P.12)
% BAND REJECT FREQUENCY
control
Sets the rejection frequency when the
BAND REJECT switch is set to ON.
(See P.12)
^ INFRASONIC FILTER switch
When this switch is set to ON, the
inaudible, ultralow frequencies below the
frequency set with the INFRASONIC
FILTER FREQUENCY switch are cut off.
This improves the reproduction
performance of the speakers by eliminating
unnecessary oscillations which will not
become sound.
& INFRASONIC FILTER FREQUENCY
switch
Switches the cutoff frequency when the
INFRASONIC FILTER switch is set to ON.
NOTE
2CAUTION
2CAUTION

* POWER indicator
This indicator glows when the unit's power
is turned ON.
( COOLING FAN indicator
When the unit's internal temperature rises,
the slide panel opens automatically and the
cooling fan is activated.
The cooling fan is also activated when the
slide panel is opened.
Whilst the cooling fan is in operation, the
COOLING FAN indicator blinks.
) OPERATION/PROTECTION
indicator
This indicator glows when the power
comes ON normally.
If the PROTECTION function is activated,
the indicator blinks or goes out.
@1 LOW VOLTAGE indicator
This indicator glows when the power
voltage falls below 11V (volts).
If the power supply voltage returns to full
after a voltage drop, this indicator will blink
to alert the user that a voltage drop has
occurred.
The number of blinks indicates the number
of times the voltage has dropped (up to a
maximum of 10).
@2 B.M.S. indicator
This indicator glows when the bass boost is
turned ON using the B.M.S. (See P.6).
If indicators !9 to @2 light up in succession or
blink in unison, the system is in DEMO mode.
If this happens, cancel DEMO mode by
pressing the OPEN/CLOSE button.
■ PROTECTION function
This unit incorporates a protection function
which protects the main unit and speakers
from troubles. The unit stops to function
when the protection function is activated.
• When the OPERATION/
PROTECTION indicator blinks:
• A speaker cable may be short-circuited.
• A speaker output may be in contact with
the ground.
• The temperature of the internal parts may
be higher than 120°C (248°F)
• The fuse of this unit may be blown.
• The unit may be malfunctioning and
sending DC signal to the speaker output.
• The sigma servo connection may be
erroneous.
Cancelling: turn the accessory power
source (ACC) OFF, then back ON.
• When the POWER indicator and the
OPERATION/PROTECTION function
both go out:
• The fuse of this unit may be blown.
• When the LOW VOLTAGE indicator
glows or blinks:
• Is the battery exhausted?
• The car battery has a small capacity.
• If the battery cable is too thin or too long,
it will not be able to supply enough
power.
• Is the battery cable deteriorated?
NOTE
English 5
eXce l on
AIR
INDUCTION
COOLING FAN
OPERATION
/ PROTECTION
OPEN
/ CLOSE
LOW VOLTAGE
B.M.S.
(MIN) (MAX)
5
4
32
1
0.5
0.2 50 100
50 40200 200
B.M.S.
FREQUENCY
INPUT
SENSITIVITY
B.R.F.
FREQUENCY
LO PASS
FREQUENCY
POWER
AIR
INDUCTION
COOLING FAN
OPERATION
/ PROTECTION
OPEN
/ CLOSE
LOW VOLTAGE
B.M.S.
(MIN) (MAX)
5
4
32
1
0.5
0.2 50 100
50 40200 200
B.M.S.
FREQUENCY
INPUT
SENSITIVITY
B.R.F.
FREQUENCY
LO PASS
FREQUENCY
POWER
MONO POWER AMPLIFIER
COOLING FAN
OPERATION / PROTECTION
OPEN
/ CLOSE
LOW VOLTAGE
B.M.S.
*
(
)
@1
@2

6 English
B.M.S. (Bass Management System)
AIR
INDUCTION
(MIN) (MAX)
5
4
32
1
0.5
0.2 50 100
50 40200 200
B.M.S.
FREQUENCY
INPUT
SENSITIVITY
B.R.F.
FREQUENCY
LO PASS
FREQUENCY
POWER
L L
R
R
OUTLINE IN
P.CONGND EXT.AMP.CONT.
30
15 20 25 ON
OFF ON
OFF ON
OFF
INFRASONIC BAND
REJECT LPF
FREQ (Hz) B.M.S.
B.M.S.
(
+
6)B.M.S.
(REMOTE)
CLOSE OPEN/
MONO POWER AMPLIFIER
COOLING FAN
OPERATION
/ PROTECTION
OPEN
/ CLOSE
LOW VOLTAGE
B.M.S.
B.M.S.
B.M.S.
(
+ 6)B.M.S.
(REMOTE)
CLOSE
OPEN/
50 100
B.M.S.
FREQUENCY
OPERATION / PROTECTION
OPEN / CLOSE
LOW VOLTAGE
B.M.S.
1
2
3
■ If the unit is not going to be operated from the outside:
1 B.M.S. switch
This boosts the bass, focusing mainly on
the frequency setting determined using the
B.M.S. FREQUENCY control.
• (REMOTE) OPEN/CLOSE or
(REMOTE) B.M.S. position:
When the switch is in this position, the
bass is not boosted.
• B.M.S. (+6) position:
When the switch is in this position, the
bass is boosted by 6dB.
The B.M.S. indicator glows.
2 B.M.S. FREQUENCY control
When the B.M.S. switch is set to the
B.M.S. (+6) position, this control can be
used to adjust the central frequency that
you want to emphasise.
3 OPEN/CLOSE button
Each time you press this button, the slide
panel either opens or closes.
• If the slide panel meets an obstacle whilst
sliding, the slide operation will be halted. If
this happens, remove the obstacle and then
press the OPEN/CLOSE button again.
• If the centre unit power is switched OFF, or
the vehicle engine is switched OFF, whilst
the slide panel is open, the slide panel will
then close automatically. The next time the
power is turned ON or the vehicle engine is
turned ON, the slide panel will return to its
original open state.
• If the B.M.S. switch setting is changed to
(REMOTE), the slide panel will close in
preparation for remote operation, even if the
EXT.AMP.CONT. terminal is not connected.
Take care not to allow your finger or any other
object to be trapped by the slide panel whilst
it is sliding.
2CAUTION
NOTE
B.M.S. indicator
Slide panel
Bass boost +6dB (ON)
Operations using the
OPEN/CLOSE button
Slide panel
Bass boost Flat (OFF)
Operations using the
OPEN/CLOSE button

English 7
■ If the unit is going to be operated from the centre unit:
The amount of bass boost and the opening/closing of the slide panel can be controlled from
the centre unit. Additionally, up to 3 power amplifiers can be set at the same time.
Kenwood centre units released in 1999 or later having an “EXT.AMP.CONT.” cable operate
this unit. Instructions on how to operate the centre unit will be found in the instruction manual
supplied with the centre unit.
NOTE
1 B.M.S. switch
This switch is used to select the range of
control operations that can be carried out
from the centre unit.
When the bass boost is switched ON, the
B.M.S. indicator glows.
• (REMOTE) OPEN/CLOSE position:
When the switch is in this position, only the
opening/closing of the slide panel can be
controlled from the centre unit; the bass
cannot be boosted.
• (REMOTE) B.M.S. position:
When the switch is in this position, any of
the three bass boost settings — FLAT,
+6dB and +12dB — can be selected from
the centre unit. If "+6 dB" or "+12 dB" is
selected, the slide panel will open.
• B.M.S. (+6) position:
When the switch is in this position, the
bass is boosted by 6dB, regardless of any
operation carried out from the centre unit.
2 B.M.S. FREQUENCY control
This control allows you to use the B.M.S. to
adjust the central frequency that you want
to emphasise.
3 OPEN/CLOSE button
• When the B.M.S. switch is in the B.M.S.
(+6) position, the slide panel will open or
close each time the button is pressed.
• When the B.M.S. switch is set to the
(REMOTE) position, the centre unit will
control the slide panel.
If you want to adjust the control inside the
slide panel, you can open/close the slide
panel temporarily by pressing the
OPEN/CLOSE button.
• If the slide panel meets an obstacle whilst
sliding, the slide operation will be halted. If
this happens, remove the obstacle and then
press the OPEN/CLOSE button again.
• When the B.M.S. is in the (REMOTE)
position, and control operations are carried
out on the centre unit, the slide panel will
return to the status set on the centre unit
even if it is opened/closed using the
OPEN/CLOSE button.
• If the centre unit power is switched OFF, or
the vehicle engine is turned OFF, when the
slide panel is open, the slide panel will
automatically close.
When the power is turned back ON, or
when the vehicle engine is turned ON, the
slide panel will carry out an action
depending on the setting status of the
B.M.S. switch, as follows.
*If the B.M.S. switch is in the (REMOTE)
position, the slide panel will obey the
setting on the centre unit.
*If the B.M.S. switch is in the B.M.S. (+6)
position, the slide panel will return to its
original open state.
Take care not to allow your finger or any other
object to be trapped by the slide panel whilst
it is sliding.
2CAUTION
NOTE
Slide panel
Bass boost
Centre unit
setting status
CLOSE
Flat (OFF)
OPEN
AMP
BASS
+6
AMP
BASS
Flat
AMP
BASS
+12
Slide panel
Bass boost
Centre unit
setting status
CLOSE
+6dB
(ON)
Flat
(OFF)
OPEN
+12dB
(ON)
AMP
BASS
+6
AMP
BASS
Flat
AMP
BASS
+12
Slide panel
Bass boost
Centre unit
setting status
+6dB (ON)
Operations using the
OPEN/CLOSE button
AMP
BASS
+6
AMP
BASS
Flat
AMP
BASS
+12

8 English
L L
R
R
OUTLINE IN
P.CONGND EXT.AMP.CONT.
30
15 20 25 ON
OFF ON OFF ON OFF
INFRASONIC BAND
REJECT LPF
FREQ (Hz) B.M.S.
B.M.S.
(
+ 6)B.M.S.
(REMOTE)
CLOSE
OPEN/
P.CON
GND
L
R
LINE IN
■ RCA cable connection
CENTRE UNIT
(Cassette receiver,
CD receiver, etc.) RCA cable *
RCA cable ground terminal
When using an RCA cable with a ground lead attached, connect the ground lead to this
terminal.
Do not use this terminal for power source grounding. This unit will be damaged if the power
source grounding cable is connected to this terminal.
2CAUTION
Left input
Connection
RCA cable ground terminal
Right input
SPEAKER OUTPUT
FUSE(15A×4 )
–+
–+
BATT.
GND
15 15 15 15
SERVO II
FEED BACK
∑
■ Speakers cable connection
Speaker
Lead terminal *
* : Commercially available parts
* : Commercially available parts
Distribute the speaker cables and sigma servo
cables along the same paths.
NOTE

English 9
■ 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 2Ωor 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.
600W
(4Ω)
4 Ω
1200W
(2Ω)1200W (2Ω)1200W (2Ω)
4 Ω4 Ω
600W
(2Ω)300W
(8Ω)300W (8Ω)
600W
(2Ω)
(600W/4Ω)(600W/4Ω) (600W/4Ω)
Maximum output of
the amplifier Combined
impedance
Rated input power and
impedance of the speakers
L L
R
R
OUTLINE IN
P.CONGND EXT.AMP.CONT.
30
15 20 25 ON
OFF ON OFF ON OFF
INFRASONIC BAND
REJECT LPF
FREQ (Hz) B.M.S.
B.M.S.
(
+ 6)B.M.S.
(REMOTE)
CLOSE
OPEN/
EXT.AMP.
CONT.
P.CONT.
P.CONEXT.AMP.CONT.
GND
Lead terminal *
* : Commercially available parts
CENTRE UNIT
(Cassette receiver,
CD receiver, etc.)
Power control cable
(Blue/ White)
External amplifier control
cable (Pink / Black)
Extension cable *
Power control lead terminal External amplifier control terminal
■ Control terminal
Attach the connection terminal to a commercially available wiring cable for in-car use, and
connect it to the unit.
An EXT.AMP.CONT. terminal can only be attached if Kenwood centre unit is a model released in
1999 or latter, and has an “EXT.AMP.CONT.” cable. Using the external amp control, up to 3
power amplifiers can be operated simultaneously (although this may not be possible, depending
on the type of wiring cable used, and its length).
NOTE

10 English
Connection
■ Power cable connection
To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery’s
positive terminal.
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 cable.
• Do not allow the cable to directly contact the edge of the iron plate by using Grommets.
• Connect the ground cable 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
cable is not connected.
• Please be sure to install a protective fuse in the power cable, near the battery. Use a fuse which
has a capacity about 10A higher than the capacity of the fuse in the unit.
• For the power cable and the earth cable, use (flame-resistant) power wiring cables for in-car use.
For the power cable, use a power wiring cable with a current capacity about 10A higher than the
capacity of the protective fuse (about 20A higher than the capacity of the fuse in the unit).
• When more than one power amplifier are going to be used, use a power supply wiring cable and
protective fuse of greater current-handling capacity than the total maximum current drawn by each
amplifier.
2WARNING
Fuse capacity
60 A
Protective Fuse Cross-sectional Area of Wiring
Cable (AWG)
5 mm2(AWG 10) or greater ×1
Example: One Power Amplifier Is Used
75 A 25 A 25 A 25 A
25 A
25 A
25 A
SPEAKER OUTPUT
FUSE(15A×4 )
–+
–+
BATT.
GND
15 15 15 15
SERVO II
FEED BACK
∑
Terminal cover
Battery
Ground cable *
Battery cable *
Protective
Fuse
Power terminal
* : Commercially available parts
Lead terminal *
Lead terminal *
Power terminal
Pass battery and ground cables through supplied terminal cover and connect to respective
terminals. After completing connections, fasten terminal cover over terminal bracket.