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INPUT SELECTOR switch

This switch selects the input method of the
signals to be amplified by amplifiers A and
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.

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INPUT SENSITIVITY control

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

Refer to “Specifications” on the centre
unit’s instruction manual about the pre-out
level.

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OPERATION switch

The amplification methods of the signals
input to amplifiers A and B can be selected
independently according to the setting of
this switch.

• 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.)

%

FILTER switch

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:

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.

^

HPF FREQUENCY control 

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

&

LPF FREQUENCY control 

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

*

INFRASONIC FILTER switch

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
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.

NOTE

English

5

AIR

INDUCTION

LO PASS

50

50

200

200

HI PASS

LO PASS

50

50

200

200

HI PASS

FILTER

FREQUENCY

A

B

POWER

COOLING FAN 

OPERATION/PROTECTION

OPEN/CLOSE

LOW VOLTAGE

B.M.S.

4/3/2 CHANNEL POWER AMPLIFIER

&

^

LO PASS

50

50

200

200

HI PASS

LO PASS

50

50

200

200

HI PASS

FILTER

FREQUENCY

A

B

25Hz

15Hz

INFRASONIC

FREQ (Hz)

OFF

FILTER

LPF

OFF

HPF

OPERATION

MONO

STEREO

B.M.S.

B.M.S.

FREQ(Hz)

B.M.S.

(

+

6)

CLOSE

OPEN/ B.M.S.

(REMOTE)

0.2

0.5

5

1

2

3

4

100

50

80

(MAX)

(MIN)

INPUT SENSITIVITY(V)

CONTROL

B

Summary of Contents for KAC-PS501F

Page 1: ...KAC PS501F B64 1444 00 EM 4 CHANNEL POWER AMPLIFIER INSTRUCTION MANUAL ...

Page 2: ... 2 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 ...

Page 3: ...e 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 tra...

Page 4: ...d impedance is 2Ω or greater for each channel Bridged Connections 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 ...

Page 5: ...er 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 HPF FREQUENCY...

Page 6: ... 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...

Page 7: ...utton 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 C...

Page 8: ...ltage drop has occurred The number of blinks indicates the number of times the voltage has dropped up to a maximum of 10 5 B M S indicator This indicator glows when the bass boost is turned ON using the B M S See P 6 If indicators 2 to 5 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 u...

Page 9: ...ame 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 maxim...

Page 10: ...t Connection RCA cable ground terminal Power control cable To Power control terminal A Right input B Right input 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...

Page 11: ...RIDGED R L Speakers cable connection Stereo Connections Front Left speaker Front Right speaker Rear Right speaker Rear Left speaker Bridged Connections A Bridged output Lead terminal B Left output B Right output A Left output A Right output Speaker output terminals B Bridged output Speaker Bridged Speaker Bridged Speaker output terminals Lead terminal Commercially available parts ...

Page 12: ...CONT 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 L R L R L R L R LINE OUT A B BRIDGED 25Hz 15Hz INFRASONIC FILTER OPERATION OFF 0 2 0 5 5 1 2 3 4 MAX MIN 25Hz 15Hz INFRASONIC FREQ Hz FREQ Hz OFF LPF O...

Page 13: ...ially 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 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 uni...

Page 14: ...onnected with wrong polarity A speaker cable is pinched by a screw in the car body The switches may be set improperly The system is in DEMO mode The slide panel has gone into remote operation mode The B M S switch is set to B M S 6 The external amplifier control cable has come loose Connect the input or output cables Check connections by referring to Indicator Replace the fuse with a new fuse and ...

Page 15: ...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 4 Channel Mode 150 W 4 1 kHz 0 5 THD Frequency Response 0 3 dB 5 Hz 50 kHz Total Harmonic Distortion Rated power 0 01 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 200 Low Pass Filter ...

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