KAC-PS500F
4-CHANNEL POWER AMPLIFIER 7 Page 2-13
INSTRUCTION MANUAL
AMPLIFICATEUR DE PUISSANCE 4 CANAUX 7 Page 14-25
MODE D’EMPLOI
4-KANAL-ENDSTUFE 7 Page 26-37
BEDIENUNGSANLEITUNG
4-KANAALS-EINDVERSTERKER 7 Page 38-49
GEBRUIKSAANWIJZING
AMPLIFICATORE DI POTENZA A 4 CANALI 7 Page 50-61
ISTRUZIONI PER L’USO
AMPLIFICADOR DE POTENCIA DE 4 CANALES 7 Page 62-73
MANUAL DE INSTRUCCIONES
AMPLIFICADOR DE POTÊNCIA DE 4 CANAIS 7 Page 74-85
MANUAL DE INSTRUÇÕES
LA DICHIARAZIONE DI CONFORMITA' "CE"
DI QUESTO PRODOTTO E' DEPOSITATA
PRESSO:
KENWOOD ELECTRONICS EUROPE B.V.
AMSTERDAMSEWEG 37
1422 AC UITHOORN
THE NETHERLANDS
© B64-1215-00 (EM)
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Controls
vibrations that do not result in sound and
improves the speakers’ ability to reproduce
sound. Note that the speaker output will
automatically be set for monaural (L+R)
sound.
This is a 4 channel amplifier including 2 stereo amplifiers in a body. One amplifier is
referred to as amplifier A and the other is amplifier B. This unit is compatible with
a large variety of systems by combining the switches and functions described in
the following.
% Ground terminal
^ Amplifier A speaker output
terminals
& Amplifier B speaker output
terminals
9 INPUT SELECTOR switch
This switch selects the input method of the
signals to be amplified by amplifiers A and
B.
1
2 3 4 5 6
❖SPEAKER OUTPUT terminals
• Stereo Connections:
When you wish to use the unit as a
stereo amplifier, stereo connections are
used.
CONTROL
2
LINE IN
LINE OUT
A +
CONTROL
A
B
15Hz
15Hz
OFF 25Hz
MONO
A
B
B
• A B position:
Amplifies both of the signals input to
amplifiers A and B.
• A position:
Amplifies only signal input amplifier A with
both amplifiers A and B.
OFF 25Hz
2
5
1
1
3
L
0.5
3
0.5
GND
L
INFRASONIC
100 120
INFRASONIC
4
4
P.CON(REMOTE)
120
100 100
150
120
(MIN)
(MAX)
(MIN)
5
0.2
(MAX)
0.2
100
70
INPUT
INPUT
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.
FILTER
120150
150
FILTER
OFF
HPF LPF
SENSITIVITY(V)
SENSITIVITY(V)
70
150
OFF
HPF LPF
R
STEREO MONO
OPERATION
A
B
A
R
STEREO MONO
70
170
50 LPF 200
50 HPF 200
70
170
50 LPF 200
50 HPF 200
INPUT
OPERATION
FREQUENCY(Hz)
FREQUENCY(Hz)
SELECTOR
CONTROL
CONTROL
2
B
A
15Hz
OFF 25Hz
15Hz
0 OPERATION switch
2
OFF 25Hz
1
7
8
1
The amplification methods of the signals
input to amplifiers A and B can be selected
independently according to the setting of
this switch.
3
3
4
0.5
(MAX)
0.5
• Bridged Connections:
INFRASONIC
100 120
INFRASONIC
4
120
100 150
120
When you wish to use the unit as a high-
output monaural amplifier, bridged
connections are used. (Make connections
to the LEFT channel (+) 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.
(MIN)
(MIN)
(MAX)
5
0.2
INPUT
SENSITIVITY(V)
5
0.2
100
70
100
INPUT
FILTER
FILTER
OFF
HPF LPF
120150
SENSITIVITY(V)
STEREO MONO
150
70
150
OFF
HPF LPF
A
B
A
STEREO MONO
• STEREO position:
The amplifier can be used as a stereo
amplifier.
• MONO (Lch) position:
Amplifies the signal input from the left side
only. Set to this position and make bridged
connections to use as a high-power
monaural amplifier. (The input right signal is
not output.)
70
70
170
50 LPF 200
50 HPF 200
170
50 LPF 200
50 HPF 200
OPERATION
OPERATION
INPUT
SELECTOR
Amplifier A
Amplifier B
9 0 ! @
$ %
#
^
&
* (
2CAUTION
The rated input of the speakers should be
no less than the maximum output of the
amplifier. Otherwise malfunction may
result.
SPEAKER OUTPUT
! FILTER switch
A
B
Σ
SERVO FEED BACK
Ι
LEFT
BRIDGED
RIGHT
FUSE(20A×4)
This switch allows to apply high-pass or
low-pass filtering to the speaker outputs.
A
A
B
BATT.
GND
• 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:
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.
B
* Amplifier A SIGMA SERVO I
FEED BACK terminals (See p.7)
( Amplifier B SIGMA SERVO I
FEED BACK terminals (See p.7)
1 Cooling fans
6 Power control (REMOTE) terminal
2CAUTION
When the internal temperature of the
amplifier rises, the cooling fans are
activated automatically to drop the
temperature. In certain situations, the
cooling fans may be operating from the
beginning of the amplifier operation.
7 INPUT SENSITIVITY control
Adjust this control according to the pre-out
level of the center unit connected to this
amp.
The SIGMA SERVO FEEDBACK terminals
should be connected properly. Failure to
connect them properly will be the cause of
breakdown.
The sensitivities of amplifiers A and B can
be adjusted independently regardless of
the position of the input selector switch.
2 RCA cable ground lead terminal
3 Amplifier A LINE IN terminal
4 Amplifier B LINE IN terminal
NOTE
@ FREQUENCY control
Refer to “Specifications” on the center
unit’s instruction manual about the pre-out
level.
When the FILTER switch is set to the HPF
(High-Pass Filter) or LPF (Low-Pass Filter)
position, the threshold frequency can be
adjusted with this control.
5 LINE OUT terminal
These jacks output respectively the signals
input to amplifiers A and B. They always
output the stereo signals regardless of the
position of the OPERATION switch.
8 INFRASONIC FILTER FREQUENCY
switch
# Fuse (20 A × 4)
$ Battery terminal
When this switch is set to 15 Hz or 25 Hz,
frequencies below the setting value will be
cut. This serves to get rid of unwanted
4 English
English 5
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Power indicator
Sigma servo feed back
The sound reproduced through conventional amplifiers is distorted due to the counterelectromotive
force produced in the oscillating system of the speaker. The counterelectromotive force is
particularly high with the woofer which requires a large drive mass.The sigma servo connection
reduces distortion caused by the counterelectromotive force by including the circuit up to the
speaker terminals in the negative feedback loop. This makes it possible to drive speakers with
more fidelity to the input signals and create a sharp bass sound image with few feeling of noise
interference.
■Power indicator:
Power indicator
This lamp indicates the status of the unit,
including the power supply and protection
function, by lighting in red, amber or green or
turning off.
When power is turned ON, it lights in green
for a few seconds, then turns red when
normal operation starts.
The aforementioned effects will not be obtained when the sigma servo connection has not been
made.
NOTE
■The protection function is activated in the following situations:
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.
The speaker cable and the sigma servo cable should be wired to run along the same route. Note
that this wiring should be separated from the power supply cable.
•If the POWER INDICATOR lights in green:
• A speaker cable may be short-circuited.
2CAUTION
• The SIGMA SERVO FEEDBACK terminals should be connected properly. Failure to connect
them properly will be the cause of breakdown.
• The rated input of the speakers connected to this unit should be no less than the maximum
output of the amplifier. Otherwise malfunction may result.
• 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 sigma servo connection may be erroneous.
• The fuse of this unit may be blown.
Be specially careful in this when connecting speakers in a parallel configuration.
• Speakers that are to be used for bridged connections to this unit should have an impedance of
4Ω or greater. When connecting multiple speakers, ensure that the combined impedance is 4Ω
or greater. Connection of speakers of less than 4Ω will be the cause of breakdown.
• The unit may be malfunctioning and sending DC signal to the speaker output.
•If the POWER INDICATOR does not light up:
• The grounding cable of this unit may not be connected with a metallic part which is
electrically connected with the negative terminal of the battery.
• The power control cable may not be connected to this unit.
• The grounding cable of the center unit (cassette receiver, CD receiver, etc.) may not be
connected with a metallic part which is electrically connected with the negative terminal of
the battery.
■Basic sigma servo connection
■Series connection
L
BRIDGED
L
BRIDGED
• The fuse of this unit may be blown.
R
R
■Drop in supply voltage (If the POWER INDICATOR lights or blinks in
amber):
Σ SERVO Ι
FEED BACK
Σ SERVO Ι
FEED BACK
When the power supply voltage drops below 11.5 V, the POWER INDICATOR lights in amber.
If the POWER INDICATOR blinks or lights in amber, check the following items and make sure
to supply enough power to this unit.
2CAUTION
Make this cable as short as possible.
• Is the battery cable too thin to supply enough power?
• Is the battery cable deteriorated?
• Is the battery exhausted?
■Parallel connection (1)
■Parallel connection (2)
L
2CAUTION
BRIDGED
L
BRIDGED
Do not use thin or deteriorated cables for this may cause heat generation or burn. The cable
used should be thick enough (5 mm2 or more) to supply power.
R
R
Σ SERVO Ι
FEED BACK
Σ SERVO Ι
FEED BACK
2CAUTION
2CAUTION
The speaker cables connected to this unit
should be thick enough to supply the
current capacity of two speakers.
This connection is possible only when the
speakers are identical and the speaker cables
are also of the same type and length.
Combined Impedance
Refer to the diagrams below and ensure that the combined impedance is 2Ω or greater for
stereo connections and 4Ω or greater for bridged connections.
■Stereo Connections When the Aforementioned Connections Are Not
Possible
■Basic connection
■Series connection
■Parallel connection
L
L
BRIDGED
BRIDGED
L
R
4 Ω
R
BRIDGED
4 Ω
R
Σ SERVO Ι
4 Ω
4 Ω
Σ SERVO Ι
FEED BACK
FEED BACK
4 Ω
4 Ω
Σ SERVO Ι
FEED BACK
8 Ω
2
6 English
English 7
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Connection
■Power and Speakers cable connection (Stereo Connections)
■Bridged Connections
ALINE IN (Front)
A Bridged
CENTER UNIT
(Cassette receiver,
CD receiver, etc.)
RCA cable (Commercially
available part)
Σ
Σ
Power control cable
(Commercially
available part)
SPEAKER OUTPUT
A
B
Σ
SERVO
A
Ι
FEED BACK
LEFT
BRIDGED
RIGHT
FUSE(20A×4)
BLINE IN (Rear)
A
B
BATT.
GND
B
B Left input (White)
Power control (REMOTE)
lead terminal
Σ
Σ
A Left input (White)
CONTROL
2
LINE IN
LINE OUT
CONTROL
A
B
15Hz
15Hz
OFF 25Hz
MONO
B
A
+
B
OFF 25Hz
2
5
1
1
B Bridged
3
L
0.5
3
0.5
GND
L
INFRASONIC
100 120
INFRASONIC
4
4
P.CONREMOTE)
120
100 100 150
120
(MIN)
(MAX)
(MIN)
5
0.2
(MAX)
0.2
100
70
INPUT
INPUT
FILTER
120150
150
FILTER
OFF
HPF LPF
SENSITIVITY(V)
SENSITIVITY(V)
70
150
OFF
HPF LPF
R
STEREO MONO
OPERATION
A
B
A
R
STEREO MONO
■Connection Precautions
70
170
50 LPF 200
50 HPF 200
70
170
50 LPF 200
50 HPF 200
INPUT
OPERATION
FREQUENCY(Hz)
FREQUENCY(Hz)
SELECTOR
Power terminal
2WARNING
Pass battery and ground cables through supplied
terminal cover and connect to respective
terminals. After completing connections, fasten
terminal cover over terminal bracket.
B Right input (Red)
A Right input (Red)
To prevent fire caused by a short in the
wiring, connect a fusible link or breaker
nearby the battery’s positive terminal.
Front left
speaker
Front right
speaker
NOTE
Round terminal (Medium)
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.
Σ
Σ
SPEAKER OUTPUT
A
B
Σ
SERVO
A
Ι
FEED BACK
LEFT
BRIDGED
RIGHT
FUSE(20A×4)
A
B
BATT.
GND
B
RCA cable ground terminal
Power control lead terminal
When using an RCA cable with
a ground lead attached, connect
the ground lead to this terminal.
Connect the Center units's power
control lead from the center unit.
Σ
Σ
Rear right
speaker
Terminal cover
2CAUTION
Round terminal
(Small)
Rear left
speaker
Do not use this terminal for power source
grounding. This unit will be damaged if the
power source grounding wire is connected to
this terminal.
Battery cable (Commercially
available part)
Ground cable (Commercially available part)
• 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 cord to directly contact the edge of the iron plate by using
Grommets.
2CAUTION
Speaker Output/Sigma Servo
Feedback Terminals
• Speakers that are to be used for stereo connections to
this unit should have an impedance of 2Ω or greater.
When connecting multiple speakers, ensure that the
combined impedance is 2Ω or greater. Connection of
speakers of less than 2Ω will be the cause of breakdown.
• Speakers that are to be used for bridged connections to
this unit should have an impedance of 4Ω or greater.
When connecting multiple speakers, ensure that the
combined impedance is 4Ω or greater. Connection of
speakers of less than 4Ω will be the cause of breakdown.
Connect the speaker output
cables to these terminals.
Round terminal (Large)
Fire wall
Lead terminal
(Commercially
available part)
Grommets
+
-
Battey
8 English
English 9
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System examples
By combining the switches and functions of the KAC-PS500F, you can implement a wide
range of audio system configurations.
■Tri-mode
With the KAC-PS500F, a subwoofer can be added easily to the speaker system by marking
use of the properties of coils and capacitors. This mode of operation is called Tri-mode.
■ Full-range 4-channel + Subwoofer system
CONTROL
2
A
15Hz
L
L
CONTROL
A
A
B
OFF 25Hz
1
L
15Hz
C
BRIDGED
Front
speaker
2
OFF 25Hz
LINE IN
1
3
0.5
L
R
A
B
INFRASONIC
100 120
R
4
L
3
0.5
BRIDGED
INFRASONIC
(MIN)
LINE IN
(MAX)
5
0.2
C
4
100
70
INPUT
R
FILTER
120150
150
(MIN)
(MAX)
5
0.2
R
Σ SERVO Ι
SENSITIVITY(V)
CENTER UNIT
100 120
120150
150
OFF
100
70
INPUT
FEED BACK
FILTER
OFF
HPF LPF
HPF LPF
SENSITIVITY(V)
STEREO MONO
Σ SERVO Ι
CENTER UNIT
STEREO MONO
L
70
FEED BACK
170
50 LPF 200
50 HPF 200
L
OPERATION
A
B
A
L
70
170
50 LPF 200
50 HPF 200
C
C
Rear
speaker
BRIDGED
LINE IN
OPERATION
A
B
A
L
R
INPUT
SELECTOR
R
CONTROL
L
B
BRIDGED
15Hz
LINE IN
INPUT
SELECTOR
CONTROL
B
2
1
OFF 25Hz
L
R
15Hz
R
Σ SERVO Ι
LINE OUT
2
1
OFF 25Hz
3
4
0.5
A
B
FEED BACK
+
R
INFRASONIC
L
3
4
0.5
Σ SERVO Ι
120
100 150
120
LINE OUT
INFRASONIC
(MIN)
(MAX)
5
0.2
100
70
A
B
FEED BACK
+
INPUT
R
L
120
100 150
120
FILTER
OFF
(MIN)
(MAX)
5
0.2
SENSITIVITY(V)
STEREO MONO
150
100
70
LINE IN
INPUT
Subwoofer
(High pass)
FILTER
OFF
HPF LPF
SENSITIVITY(V)
STEREO MONO
150
R
Subwoofer
(L + R)
(Bridged)
HPF LPF
70
(High pass)
Amplifier
170
50 LPF 200
50 HPF 200
OPERATION
70
170
50 LPF 200
50 HPF 200
OPERATION
■ High-pass (100 Hz) + Subwoofer (100 Hz) system
CONTROL
2
A
●Principle of Tri-mode
15Hz
L
A
B
OFF 25Hz
1
L
BRIDGED
Method of frequency band division using a coil and capacitor•••in case of 6dB/oct. slope
LINE IN
3
0.5
R
INFRASONIC
100 120
R
4
(MIN)
(MAX)
5
0.2
Coil (L): Passes low frequencies and blocks high
100
70
INPUT
FILTER
120150
150
Crossover Frequency
Σ SERVO Ι
SENSITIVITY(V)
CENTER UNIT
OFF
frequencies. (Low pass)
FEED BACK
HPF LPF
0 dB
-3 dB
STEREO MONO
Capacitor (C): Passes high frequencies and blocks low
70
170
50 LPF 200
50 HPF 200
L
Subwoofer
(L + R)
(Bridged)
OPERATION
A
B
A
L
frequencies. (High pass)
BRIDGED
LINE IN
R
INPUT
SELECTOR
R
CONTROL
L
B
159000
C
15Hz
C=
L=
(µF)
2
1
OFF 25Hz
L
fc x R
159 x R
fc
fc=Cut of Frequency (Hz)
R=Speaker Impedance (Ω)
Σ SERVO Ι
LINE OUT
3
4
0.5
Frequency
A
B
FEED BACK
+
R
INFRASONIC
(mH)
120
100 150
120
(MIN)
(MAX)
5
0.2
100
70
INPUT
FILTER
OFF
SENSITIVITY(V)
STEREO MONO
150
HPF LPF
●Example:
70
When it is required to set a crossover frequency of 120 Hz using speakers with an
impedance of 4 ohms.
170
50 LPF 200
50 HPF 200
OPERATION
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).
■ High-power 2-channel system
CONTROL
2
A
15Hz
OFF 25Hz
Left
speaker
L
A
B
1
L
BRIDGED
LINE IN
3
0.5
R
INFRASONIC
100 120
2CAUTION
R
4
(MIN)
(MAX)
5
0.2
100
70
INPUT
Be sure to connect a capacitor to the high-pass speaker. Failure to connect a capacitor will result
in a drop of the combined impedance with the woofer.
FILTER
OFF
120150
150
Σ SERVO Ι
CENTER UNIT
SENSITIVITY(V)
FEED BACK
HPF LPF
STEREO MONO
70
170
50 LPF 200
50 HPF 200
L
Right
speaker
OPERATION
A
B
A
L
BRIDGED
LINE IN
R
INPUT
SELECTOR
R
CONTROL
B
15Hz
2
1
OFF 25Hz
L
Σ SERVO Ι
LINE OUT
+
3
4
0.5
A
B
FEED BACK
R
INFRASONIC
120
100 150
120
(MIN)
(MAX)
5
0.2
100
70
INPUT
FILTER
OFF
SENSITIVITY(V)
STEREO MONO
150
HPF LPF
70
170
50 LPF 200
50 HPF 200
OPERATION
10 English
English 11
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Troubleshooting guide
Specifications
Often, what appears to be a malfunction is due to user error. Before
calling for service, please consult the following table.
Specifications subject to change without notice.
Audio Section
Symptom
Cause
Remedy
Max Power Output (4 Ω)
4 Channel Mode........................................................................................................150 W × 4
3 Channel Mode ..................................................................................150 W × 2 + 600 W × 1
2 Channel Mode........................................................................................................600 W × 2
No sound.
(No sound from one side.)
• Input (or output) cables are
disconnected.
• The connection of the sigma
servo terminals is wrong.
• Protection circuit may be
activated.
• The fuse may be blown
because the volume was too
high.
• Connect the input (or output)
cables.
• Check the connection referring
to "Sigma servo feedback".
• Check connections by referring
to "Power indicator".
Rated Power Output (4 Ω) (+B = 12.0 V)
4 Channel Mode ..................................................................50 W × 4 (DIN45324, +B=12.0 V)
3 Channel Mode..................50 W × 2 (1 kHz, 0.05 % THD) + 200 W × 1 (1 kHz, 0.5 % THD)
2 Channel Mode........................................................................200 W × 2 (1 kHz, 0.5 % THD)
Rated Power Output (2 Ω) (+B = 12.0 V)
• Replace the fuse with a new
fuse and use a lower volume.
4 Channel Mode........................................................................100 W × 4 (1 kHz, 0.5 % THD)
The output level is too
small (or too large).
The input sensitivity adjusting
control is not set to the correct
position.
Adjust the control correctly
referring to “Controls”.
Rated Power Output (4 Ω) (+B = 14.4 V)
4 Channel Mode ..................................................................75 W × 4 (DIN45324, +B=14.4 V)
3 Channel Mode..................75 W × 2 (1 kHz, 0.05 % THD) + 300 W × 1 (1 kHz, 0.5 % THD)
2 Channel Mode........................................................................300 W × 2 (1 kHz, 0.5 % THD)
Rated Power Output (2 Ω) (+B = 14.4 V)
The sound quality is bad.
(The sound is distorted.)
• The speakers cable are
connected with wrong + / -
polarity.
• Connect them properly checking
the + / - of the terminals and
cables well.
4 Channel Mode........................................................................150 W × 4 (1 kHz, 0.5 % THD)
• A speaker cable is pinched by a • Connect the speaker cable again
Frequency Response (+0, –1 dB) ............................................................................5 Hz ~ 50 kHz
Total Harmonic Distortion (Rated power)# ............................................................0.010 % (1 kHz)
Signal to Noise Ratio............................................................................................................110 dB
Sensitivity (rated output) (MAX)..............................................................................................0.2 V
Sensitivity (rated output) (MIN) ..............................................................................................5.0 V
Input Impedance....................................................................................................................10 kΩ
Damping Factor..............................................................................More than 1000 (at ∑ connect)
Low Pass Filter Frequency (24 dB/oct.) (Variable) ......................................................50 ~ 200 Hz
High Pass Filter Frequency (12 dB/oct.) (Variable) ......................................................50 ~ 200 Hz
screw in the car body.
so that it is not pinched by
anything.
• The switches may be set
improperly.
• Set switches properly by
referring to "Controls" and
"System examples".
Infrasonic Filter Frequency (24 dB/oct.)..........................................................................15 / 25 Hz
# Sensitivity = Mini. , Through LPF (30 kHz)
General
Operating Voltage ..............................................................................12.0 V (11 ~ 16 V allowable)
Current Consumption (4 Ω, +B = 12.0 V, 10% THD) ..............................................................42 A
Dimensions (W × H × D) ................................................................................272 × 58 × 450 mm
Weight ..................................................................................................................................7.0 kg
12 English
English 13
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