Kenwood KAC-PS500F Stereo Amplifier User Manual


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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.
L
R
L
R
L
R
L
R
L
R
LINE IN
LINE IN
LINE OUT
Σ SERVO Ι
FEED BACK
Σ SERVO Ι
FEED BACK
BA
A
B
+
BRIDGED
BRIDGED
25Hz
15Hz
INFRASONIC
FILTER
OFF
OPERATION
MONOSTEREO
LPF
OFF
HPF
CONTROL
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
50
70
100
LPF 200
170
120
50
70
200
150
120100
HPF
150
3
4
INPUT
SELECTOR
B
A
A A
(MAX)
(MIN)
OPERATION
MONOSTEREO
25Hz
15Hz
INFRASONIC
OFF
FILTER
LPF
OFF
HPF
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
3
4
(MAX)
(MIN)
CONTROL
B
50
70
100
LPF 200
170
120
50
70
200
150
120
100
HPF
150
C
C
L
C
C
L
■
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.
CENTER UNIT
(High pass)
Subwoofer
(L + R)
(Bridged)
●
Principle of Tri-mode
Method of frequency band division using a coil and capacitor•••in case of 6dB/oct. slope
L
C
0 dB
-3 dB
Coil (L):
Passes low frequencies and blocks high
frequencies. (Low pass)
Capacitor (C):
Passes high frequencies and blocks low
frequencies. (High pass)
Crossover Frequency
Frequency
159000
C= (µF)
fc x R
159 x R
L= (mH)
fc
fc=Cut of Frequency (Hz)
R=Speaker Impedance (Ω)
●
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).
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.
2CAUTION
L
R
L
R
L
R
L
R
L
R
LINE IN
LINE IN
LINE OUT
Σ SERVO Ι
FEED BACK
Σ SERVO Ι
FEED BACK
BA
A
B
+
BRIDGED
BRIDGED
25Hz
15Hz
INFRASONIC
FILTER
OFF
OPERATION
MONOSTEREO
LPF
OFF
HPF
CONTROL
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
50
70
100
LPF 200
170
120
50
70
200
150
120100
HPF
150
3
4
INPUT
SELECTOR
B
A
A A
(MAX)
(MIN)
OPERATION
MONOSTEREO
25Hz
15Hz
INFRASONIC
OFF
FILTER
LPF
OFF
HPF
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
3
4
(MAX)
(MIN)
CONTROL
B
50
70
100
LPF 200
170
120
50
70
200
150
120
100
HPF
150
L
R
L
R
L
R
L
R
L
R
LINE IN
LINE IN
LINE OUT
Σ SERVO Ι
FEED BACK
Σ SERVO Ι
FEED BACK
BA
A
B
+
BRIDGED
BRIDGED
25Hz
15Hz
INFRASONIC
FILTER
OFF
OPERATION
MONOSTEREO
LPF
OFF
HPF
CONTROL
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
50
70
100
LPF 200
170
120
50
70
200
150
120100
HPF
150
3
4
INPUT
SELECTOR
B
A
A A
(MAX)
(MIN)
OPERATION
MONOSTEREO
25Hz
15Hz
INFRASONIC
OFF
FILTER
LPF
OFF
HPF
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
3
4
(MAX)
(MIN)
CONTROL
B
50
70
100
LPF 200
170
120
50
70
200
150
120
100
HPF
150
L
R
L
R
L
R
L
R
L
R
LINE IN
LINE IN
LINE IN
LINE OUT
Σ SERVO Ι
FEED BACK
Σ SERVO Ι
FEED BACK
BA
A
B
+
BRIDGED
BRIDGED
L
R
25Hz
15Hz
INFRASONIC
FILTER
OFF
OPERATION
MONOSTEREO
LPF
OFF
HPF
CONTROL
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
50
70
100
LPF 200
170
120
50
70
200
150
120100
HPF
150
3
4
INPUT
SELECTOR
B
A
A A
(MAX)
(MIN)
OPERATION
MONOSTEREO
25Hz
15Hz
INFRASONIC
OFF
FILTER
LPF
OFF
HPF
INPUT
SENSITIVITY(V)
0.25
0.5
1
2
3
4
(MAX)
(MIN)
CONTROL
B
50
70
100
LPF 200
170
120
50
70
200
150
120
100
HPF
150
■
High-power 2-channel system
■
High-pass (100 Hz) + Subwoofer (100 Hz) system
■
Full-range 4-channel + Subwoofer system
CENTER UNIT
CENTER UNIT
CENTER UNIT
Front
speaker
Left
speaker
Rear
speaker
Right
speaker
(High pass)
Subwoofer
(L + R)
(Bridged)
Subwoofer
Amplifier
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