Harman Kardon HK6250 User manual

Integrated Amplifier
Instruction Manual
Manuel d'utilisation
Bedienungsanleitung
Manuale di istruzioni
Bruksanvisning
Gebruiksaanwijzing
Manual de instrucciones
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Congratulations on your purchase of the Harman
Kardon HK6250/HK6150 Integrated Amplifier.
In order to appreciate the full performance of this
sophisticated unit, please be sure to read this in-
struction manual and use your integrated amplifier
only in accordance with its instructions. Keep it in
a safe place for future reference.
Continuous Average Power
(FTC)
(both channels
driven, 20-20,000Hz)
HK6150 : 30 Watts per channel
@ less than 0.09% THD into
8 Ohms
HK6250 :33 Watts per channel
@ less than 0.09% THD into
8 Ohms,
45 Watts per channel
@ less than 0.3% THD into
4 Ohms
HCC (High-instantaneous
Current Capability)
HK6150 :+22 Amps
HK6250 :+30 Amps
Power Bandwidth (at half
rated output, 8 Ohms)
:<10Hz to 100,000Hz
Frequency Response (at :0.5Hz to 150,000Hz
1Watt output, +0, -3dB)
Damping Factor :60
Signal-to-Noise Ratio (ref.
rated power output, A-wtd)
Phono (MM) :80dB
Tuner, CD, Video :98dB
Input Sensitivity/Impedance
Phono (MM) :2.2mV/47k Ohms, 125pF
Tuner, CD, Video »135mV/22k Ohms
Phono Overload (MM) >110mV
Tone Control Characteristics
Bass Boost/Cut
(at 50Hz)
Treble Boost/Cut
(at 10kHz)
Dimensions (W x H x D)
:+10dB/-10dB
:+10dB/-10dB
:443 x 103 x 361 mm
(17-1/2"x 4”x14-1/4")
Weight
HK6150 :6.4kg (14. 1lbs)
HK6250 :7.0kg (15.4 Ibs)
Power Supply : AC230V/240V, 50/60Hz
Power Consumption
HK6150 > 150W
HK6250 : 165W
All
specitications
and
features
subject
to
change
without
notice.
SPECIFICATIONS
FOR CUSTOMERS IN THE UK
Your unit is supplied with the flex which will have either two or three
aes so the following items should be observed to guarantee
safety:
THREE CORE FLEX
WARNING: THIS APPARATUS MUST BE EARTHED.
IMPORTANT. The wires in this mains lead are coloured in accor-
dance with the following code:
Green-and-yellow : Earth
Blue : Neutral
Brown : Live
As the colours of the wires in the mains lead of this apparatus may
not correspond with the coloured markings identifying the terminals
in your plug, proceed as follows:
The wire which is coloured green-and-yellow must be connected to
the terminal in the plug which is marked by the letter E or by the safety
earth symbol ¥ or coloured green or green-and-yellow.
The wire which is coloured blue must be connected to the terminal
which is marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the terminal
which is marked with the letter L or coloured red.
TWO CORE FLEX
IMPORTANT. The wires in this mains lead are coloured in accor-
dance with the following code:
Blue: Neutral
Brown : Live
As the colours of the wires in the mains lead of this apparatus may
not correspond with the coloured markings identifying the terminals
in your plug, proceed as follows:
The wire which is coloured blue must be connected to the terminal
which is marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the terminal
which is marked with the letter L or coloured red.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK,
DO
NOT
EXPOSE
THIS
APPLIANCE
TO
RAIN
OR
MOISTURE.

M@ HCC (High-instantaneous Current Capabil-
ity)
Recent studies have shown that while reproducing dynamic
music signals the instantaneous impedances of nearly ail
loud-speakers drop to less than one third of the nominal
ratings. These low instantaneous impedances typically re-
quire 3 to 6 times more current than an 8 Ohm resistive load.
Reduced dynamic range and increased distortion will result if
the amplifier cannot provide these higher currents. For this
reason, the HK6750 and HK6250 were designed to provide
respectively 22 and 30 amperes of instantaneous current.
B Ultrawide Bandwidth
The bandwidth of this unit is exceptionally wide and inde-
pendent of negative feedback. This improves transient accu-
racy and phase linearity.
B Low Negative Feedback
This unit has been designed to have low distortion and wide
bandwidth without high negative feedback. This further im-
proves its dynamic accuracy.
@ Discrete Component Circuitry
In order to achieve the above goals, all discrete electronic
circuitry has been employed. All available integrated circuits
could not provide this high level of performance.
@ Sophisticated Electronic Protection
Harman Kardon engineers developed a unique protection
system that permits high instantaneous current to be driven
into speaker systems but protects the amplifier from short-
circuited or damaged speakers and wires. This protection
system in no way limits amplifier output voltage or current
during music reproduction, and therefore has no negative
effect on sound quality.
THE APPLIANCE CONFORMS WITH EEC DIREC-
TIVE 87/308/EEC REGARDING INTERFEFRENCE
SUPPRESSION
FEATURES GENERAL INSTRUCTIONS
Always Use Correct AC Voltage
Always connect the power cord to a domestic mains outlet.
Never connect the unit to an outlet supplying a higher voltage.
This may create a fire hazard.
This unit is supplied with a voltage selector enabling selection
between 230V and 240V on the rear panel. If the selector is
not set to the local voltage, set the selector to the correct
voltage with a screwdriver before connecting the power cord
to a mains outlet.
Handle the Power Cord Gently
@ Do not disconnect the plug from the AC outlet by pulling the
cord; always pull the plugitself. Pulling the cord may break the
wire.
@ If your unit will be left unused for any considerable length
of time, disconnect the plug from the AC outlet.
@ Do not place furniture or other heavy objects on the cord,
and avoid dropping heavy objects on it. Also do not make a
knot in the power cord. Not only may the cord be damaged,
it can also cause a short circuit and a consequent fire hazard.
Place of Installation
Place your unit on a firm and level surface. Avoid installing
your unit under the following conditions:
e Moist or humid places.
e Places exposed to direct sunlight or close to heating
equipment.
e Extremely cold locations such as those in the direct draft
from an air conditioner.
e Places subject to excessive vibration or dust.
e Poorly ventilated places.
Do not cover the ventilation slots on the top of the unit. This
will cause the temperature inside the unit to rise, which can
eventually affect the reliability of your unit.
Moving the Unit
Before moving the unit, be sure to unplug the power cord
from the AC outlet and disconnect the interconnection cords
to other units.
Do Not Open the Cabinet
To prevent fire or shock hazard, do not tamper with internal
components for inspection or maintenance. Harman Kardon
does not guarantee against performance degradation result-
ing from any modification.
\f water, a hairpin or wire accidentally enters the unit, imme-
diately unplug the power cord from the AC outlet to prevent
shock and consult an authorized Harman Kardon service
station. If you use the unit under this condition, it may cause
a fire or shock hazard.
Cleaning
When the unit gets dirty, wipe it with a soft dry cloth. If
necessary, wipe it with a soft cloth dampened with mild
soapy water and then wipe with a dry cloth.
Never use benzine, thinner, alcohol or other volatile agents,
and avoid spraying an insecticide near the unit.

Speaker System 1
Right channel Left channe
2)
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mga
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——|
Compact Disc Player
Connecting Other Components
Carefully
connect
the
plugs
to
the
left
and
right
channel
jacks.
Push
the
plugs
in
all
the
way.
Poor
setting
of
the
plugs
tends
to
cause
hum
or
intermittent
sound
and
may
damage
the
speakers.
NOTE:
While
you
are
connecting
this
unit
to
the
rest
of
your
high
fidelity
system,
please
unplug
the
power
cord,
discon-
necting
not
only
this
unit
but
all
the
components,
from
the
AC
outlet.
Do
not
interwind
the
connection
wires
with
the
power
cord.
if
interwound,
the
sound
quality
may
be
degraded.
Connecting Speakers
Connect
the
speaker
wires
carefully
to
the
speaker
terminals
on
the
rear
panel
so
as
not
to
mistake
the
left
and
the
right
channels
or
reverse
the
speaker
polarities
(+
and
-).
Use
sufficiently
thick
wire
(18
gauge
for
short
lengths,
16-12
gauge
for
longer
lengths).
It
is
recommended
to
use
color-
coded
wire
for
easy
polarity
identification.
Speaker
wires
should
be
as
short
as
possible,
and
the
left
and
the
right
channel
wires
should
be
the
same
length.
Video Component or
TV Tuner
°° To wall
5 outlet
+
Open Reel Tape Right channel Left channel
Deck Speaker System 2
insulation from the end of each wire SS
and twist the strands of each end. -
2. After making sure of the correct — 20mm (8/4 inch)
channel and polarity, loosen the S27
SPEAKER SYSTEM terminal knob
and insert the conductor directly
into the recess at the upper-right of
the terminal. Then tighten the termi-
nal knob, and the end of speaker
wire is automatically wound around
the terminal.
1. Remove about 20 mm (3/4 inch) of
CAUTION: Two speaker systems can
be connected to this unit. When two
speaker
systems
are
connected,
care
should
be
taken
that
the net impedance does not become less than 4 Ohms.

harman/kKardon =HK6250 :ategrated Amplifier
@ POWER SWITCH (POWER)
Pressing this switch will turn on the power and the POWER
indicator lights up. Press the switch again to turn the power
off.
@ POWER INDICATOR
When the POWER switch is pressed, this indicator lights up
in green.
@ HEADPHONE JACK (HEADPHONES)
Stereo headphones with a standard 1/4 inch plug can be
connected to this jack. When the SPEAKERS selector is in the
Off position, sound can still be obtained via the headphone
jack.
@ SPEAKER SELECTOR (SPEAKERS)
This selector is used to select the desired speaker system(s).
Off: Select this position to listen to sound via the headphone
with no sound from the speaker system(s).
71: Select this position to actuate the speaker system con-
nected to the SPEAKER SYSTEM 1 terminal.
2: Select this position to actuate the speaker system con-
nected to the SPEAKER SYSTEM 2 terminal.
1+ 2: Select this position to actuate simultaneously the two
speaker systems connected to the SPEAKER SYSTEM 1 and
2 terminals respectively.
@ BASS CONTROL KNOB (BASS)
This knob controls the low frequency sound level. Turn it
clockwise to boost or counterclockwise to reduce the low
frequency sound level.
© TREBLE CONTROL KNOB (TREBLE)
This knob controls the high frequency sound level. Turn it
clockwise to boost or counterclockwise to reduce the high
frequency sound level.
@ BALANCE CONTROL KNOB (BALANCE)
This knob is used to balance the left and the right channels.
Usually, it is set at the center. Turn it to the left or right to
balance the sound if it seems unbalanced from the speakers
or the headphones.
CONTROLS AND FUNCTIONS
Tape Monitor
Source
Tare < tez
:
D-DD
@® TAPE MONITOR SELECTOR (TAPE MONITOR)
This selector is used when playing a tape deck, or monitoring
during recording.
Copy 1 2: Select this position to duplicate a tape in the tape
deck connected to the TAPE 1 jacks onto the tape in the tape
deck connected to the TAPE 2 jacks.
Tape 1: Select this position to play a tape, or to monitor during
recording on the tape deck connected to the TAPE 1 jacks.
Source : Select this position to listen to a program source
other than a tape.
Tape 2: Select this position to play a tape, or to monitor during
recording on the tape deck connected to the TAPE 2 jacks.
@ SOURCE SELECTOR (SOURCE)
This selector is used to select a program source other than a
tape.
Video: Select this position to listen to the sound froma video
component connected to the VIDEO jacks.
Tuner: Select this position to listen to an FM or AM broadcast
from the stereo tuner connected to the TUNER jacks.
CD: Select this position to listen to the sound from a compact
disc player connected to the CD jacks.
Phono: Select this position to listen to a disc played on the
turntable connected to the PHONO jacks.
@ VOLUME CONTROL KNOB (VOLUME)
This knob controls the sound level. Turning clockwise in-
creases the sound volume, and turning counterclockwise
decreases it. Set this knob at a minimum level before turning
the power on or changing the sound source to protect the
speakers from being damaged by a sudden high level sound.
@ LOUDNESS SWITCH (Loudness)
This switch is pressed to create a natural sound quality when
listening at a low volume by boosting the low and high
frequency ranges.

OPERATIONS
Listening to a Record (Disc)
1. Turn the VOLUME control knob to the minimum level and
press
the
POWER
switch.
The
POWER
indicator
lights
up.
2. Set the SPEAKERS selector for the desired speaker sys-
tem(s).
. Set the SOURCE selector to the Phono position.
. Set the TAPE MONITOR selector to the Source position.
.
Activate
your
turntable
and
place
the
stylus
on
the
record (disc).
6. Turn the VOLUME control knob clockwise to increase the
sound volume to the desired level.
7. Adjust the BASS and TREBLE control knobs to obtain the
desired tone.
8.
Activate
the
BALANCE
control
knob
or
Loudness
switch
if
necessary.
of WO
NOTE: |f you hear a hum at average listening levels, turn the
POWER switch off and check to see that the phono and the
ground connections are secure. Depending on the cartridge
type
used,
less
hum
may
be
created
without
the
ground
connection.
Listening to Radio Broadcasts
1. Turn the VOLUME control knob to the minimum level and
press
the
POWER
switch.
The
POWER
indicator
lights
up.
2. Set the SPEAKERS selector for the desired speaker
system(s).
3. Set the SOURCE selector to the Tuner position.
4.
Set
the
TAPE
MONITOR
selector
to
the
Source
posi-
tion.
5. Activate the tuner and tune to broadcast frequency.
6. When the desired station is selected, advance the VOL-
UME
control
knob
to
a
comfortable
level
and
adjust
the
BASS and TREBLE control knobs as desired.
7. Activate the BALANCE control knob or Loudness switch if
necessary.
Listening to a Compact Disc
1. Turn the VOLUME control knob to the minimum level
and
press
the
POWER
switch.
The
POWER
indicator
lights
up.
2. Set the SPEAKERS selector for the desired speaker
system(s).
3. Set the SOURCE selector to the CD position.
4.
Set
the
TAPE
MONITOR
selector
to
the
Source
position.
5.
Activate
the
compact
disc
player
and
set
the
player
in
the
play
mode.
6,
Advance
the
VOLUME
control
knob
to
a
comfortable
level
and
adjust
the
BASS
and
TREBLE
control
knobs
as
de-
sired.
7.
Activate
the
BALANCE
control
knob
or
Loudness
switch
if
necessary.
Listening to the Video/Aux Input Source
To listen to a video component, TV tuner or other auxiliary
component:
1.
Turn
the
VOLUME
control
knob
to
the
minimum
level
and
press
the
POWER
switch.
The
POWER
indicator
lights
up.
2. Set the SPEAKERS selector for the desired speaker
system(s).
. Set the SOURCE selector to the Video position.
_ Set the TAPE MONITOR selector to the Source position.
.
Activate
the
component
connected
to
the
VIDEO
jacks.
_ Advance the VOLUME control knob to a comfortable level
and adjust the BASS and TREBLE control knobs as de-
sired.
oof W
7. Activate the BALANCE control knob or Loudness switch
if necessary.
Tape Recording
Recording from a program source (FM/AM broadcast turn-
table or compact disc player or components connected to the
VIDEO jacks) on a tape deck connected to the TAPE 1 and/or
TAPE 2 jacks:
1. Turn the VOLUME control knob to the minimum level and
press the POWER switch. The POWER indicator lights up.
2. Set the SPEAKERS selector for the desired speaker
system(s).
3. Select the desired program source with the SOURCE
selector.
4. Set the TAPE MONITOR selector to the Source position.
5. Advance the VOLUME control knob to a comfortable level.
6. Start recording by activating the tape deck(s) connected to
the TAPE 1 and/or TAPE 2 jacks. The source sound can be
listened to from the speakers or headphone.
7. To monitor the sound being recorded, set the TAPE
MONITOR selector to the Tape 7 or Tape 2 position
according to the tape deck that you wish to monitor.
NOTE: The record output signal is carried directly from the
program source without being influenced by the volume,
balance, bass and treble controls, and loudness switch of this
unit.
Tape Dubbing
Two tape decks can be connected to this unit and dubbing can
be done from the tape in the tape deck connected to the TAPE
1 jacks onto the tape in the tape deck connected to the TAPE
2 jacks.
1. Turn the VOLUME control knob to the minimum level and
press the POWER switch. The POWER indicator lights up.
2. Set the TAPE MONITOR selector to the Copy 7 - 2
position.
3. After setting the tape deck connected to the TAPE 1 jacks
for playback, and the tape deck connected to the TAPE 2
jacks for recording, dubbing will begin.
NOTE: You can listen to a program source selected via the
SOURCE selector while dubbing is taken place.
To monitor the sound being recorded, use the headphones
connected to the phones jack of tape deck.
Tape Playback
1. Turn the VOLUME control knob to the minimum level and
press the POWER switch. The POWER indicator lights up.
2. Set the SPEAKERS selector for the desired speaker
system(s).
3. Set the TAPE MONITOR selector to the Tape 7 or Tape
2 position corresponding to the tape deck to be played.
4. Insert a recorded tape in the tape deck and set the tape
deck in the playback mode.
5. Advance the VOLUME control knob to a comfortable level
and adjust the BASS and TREBLE control knobs as de-
sired.
6. Activate the BALANCE control knob or Loudness switch
if necessary.

TROUBLESHOOTING CHECKLIST
Most of the problems consumers have with their high fidelity
system are due to incorrect operation. If this unit does not
operate as you intended, first check the items in the following
Problem
The POWER indicator does not
light up when the POWER
switch is pressed.
¢ The power cord is not plugged in.
checklist. Also check other related components such as the
tuner, turntable, speakers and other electrical equipment you
use with this amplifier.
Plug in the power cord securely.
The POWER indicatorlights up,
but no sound is heard.
@ The TAPE MONITOR selector is in the
Tape 7 or Tape 2 position.
¢ The SOURCE selection was not made
properly.
¢ The SPEAKERS selector is in the Off po-
sition.
¢ The speaker wires are disconnected or
broken.
Set the TAPE MONITOR selector to the
Source position.
Set the SOURCE selector to the proper
position for the desired program source.
Set the SPEAKERS selector to the posi-
tion of your desired speaker system(s).
Check the speaker wires and connect
them correctly.
Sound is not heard from the
speaker system on one side.
* The connection of speaker wires is incor-
rect or incomplete.
® The connection wires to other equipment
are disconnected.
¢ The BALANCE control knob is turned to
either the extreme right or left position.
Check the speaker wires for disconnec-
tion or breaking and reconnect them cor-
rectly.
Check the wires for disconnection and
connect them correctly.
Set the mark on the BALANCE control
knob to the center position.
When listening to stereo
sound, the left and right sounds
are reversed.
When playing a turntable, a
low-pitched noise (“hum" or
“buzz") is heard.
© The left and right speaker wires are re-
versed.
e The left and right wires connected to other
equipment are reversed.
e The ground wire of the turntable is discon-
nected.
¢ The connections of the turntable wires are
incorrect or incomplete.
Check the speaker wires and connect
them correctly.
Check the wires to other equipment and
connect them correctly.
Make the ground wire connection
correctly.
Insert the turntable wires into the PHONO
jacks of this unit securely.
When increasing the volume
level while playing a turntable,
an undesirable prolonged
sound (howling) is heard.
e “Howling” is created by the speakers and
turntable.
¢ Too much low frequency sound is pres-
ent.
Sound quality is poor.
Place the speakers further away from the
turntable.
Place the turntable on a more solid sur-
face.
Decrease the setting of the BASS control
knob.
Turn off the Loudness switch.
¢ Input components have not been set up
correctly.
¢ Tone control is not proper.
Check the antenna of the tuner, cartridge
of the turntable, or head of the tape deck,
etc. and make corrections as needed.
Adjust the BASS and/or TREBLE control
knobs to obtain the desired tone.

SPECIFICATIONS
Nous vous félicitons d’avoir choisi l’amplificateur
intégré Harman Kardon HK6250/HK6150.
Afin d’obtenir de cet appareil sophistiqué un
rendement optimal, veuillez lire attentivement ce
manuel d'utilisation et utiliser votre amplificateur
conformément aux directives. Conservez soigneu-
sement le manuel d'utilisation pour toute référence
ultérieure.
Cet appareil est conforme ala norme, de la Commun-
auté Economique Européenne, 87/308/EEC, sur la
suppression des interférences.
Puissance moyenne continue
(FTC)
(20Hz~20kHz par canal)
HK6150
HK6250
Haute capacité en
courant instantané (HCC)
HK6150
HK6250
Bande passante (a 50%
de la puissance sur 8Q)
Réponse en fréquence
(sortie: 1W +0, -3dB)
Facteur d’amortissement
Rapport signal-bruit
(réf.: puissance de sortie
nominale, pondération A)
Phono (MM)
Tuner, CD, Vidéo
Sensibilité/impédance d’entrée
Phono (MM)
Tuner, CD, Vidéo
Surcharge phono (MM)
Caractéristiques des
commandes de tonalité
Relévement/Coupure :
des graves (a 50Hz)
Relévement/Coupure :
des aigus (a 10kHz)
Dimensions (L x H x P)
Poids
HK6150
HK6250
Alimentation
Consommation
HK6150
_ HK6250
: SOW par canal
@ distorsion harmonique
totale inférieure 4 0,09% sur
8Q
: 33W par canal
@ distorsion harmonique
totale inférieure a 0,09% sur
8Q
A45W par canal
@ distorsion harmonique
totale inférieure a 0,3% sur
4Q.
:+22A
»+30A
: <10Hz to 100kHz
: 0,5Hz a 150kHz
: 60
: 80dB
: 98dB
> 2,2MV/47kQ, 125pF
>: 135MV/22kQ
> 110mV
+10dB/-10dB
+10dB/-10dB
: 443 x 103 x 361 mm
(17 1/2 x 4x 14 1/4 po)
: 6,4kg (14,1 Ibs)
- 7,0kg (15,4 Ibs)
: Secteur 230/240V, 50/60Hz
: 150W
> 165W
Toutes les spécifications et caractéristiques peuvent étre modifiées
sans préavis.