Harman-Kardon HK 3370 User Manual

HK 3370 Stereo Receiver

OWNER’S MANUAL

MEMORY PRESET

SLEEP

AUTO

MUTE T-MON

TUNED ST

Power for the digital revolution.

™

®

2 TABLE OF CONTENTS

3 Introduction
3 Safety Information
4 Unpacking
5 Front Panel Controls
7 Rear Panel Connections

9 Remote Control Functions
11 Installation and Connections
13 Operation
13 Basic Operation
13 Source Selection
13 Tuner Operation
14 Tape Recording
14 Memory Backup
14 Processor Reset
15 Troubleshooting Guide
15 Technical Specifications

HK 3370 StereoReceiver

Typographical Conventions

In order to help you use this manual with the remote control, front-panel controls and rear-panel
connections,certain conventions have been used.

EXAMPLE – (bold type) indicates a specific remote control or front-panel button, or rear-panel
connection jack

EXAMPLE – (OCR type) indicates a message that is visible on the front-panel information display
EXAMPLE – (outlined type) indicates a lit indicator in the front-panel information display

1 – (number in a square) indicates a specific front panel control
å – (letter in a circle) indicates a button or indicator on the remote

¡ – (number in a circle) indicates a rear panel connection

3 INTRODUCTION

Introduction

Congratulations!With the purchase of the

Harman Kardon HK 3370 you are about to
begin many years of listening enjoyment.The
HK 3370 has been custom-designed to provide
all the excitement and power of rock, jazz and
popular music, and every nuance of classical
selections.

While sophisticated systems are hard at work
within the HK 3370 to make all of this happen,
hookup and operation are simple.Color-keyed
connections and a comprehensive remote con­trol make the HK 3370 easy to use.

To obtain maximum enjoyment from your new
receiver,we urge you to take a few minutes to
read through this manual.This will ensure that
connections to speakers,source playback units
and other external devices are made properly.
In addition, a few minutes spent learning the
functions of the various controls will enable
you to take advantage of all the power the
HK 3370 is able to deliver.

If you have any questions about this product,
its installation or operation,please contact your
dealer,your best local source of information.

Description and Features

The HK 3370 is a full-featured Stereo receiver,
with five inputs and an FM Stereo/FM/AM tuner
with capabilities that provide for the utmost
flexibility.A high-quality phono input is avail­able so that you may continue to enjoy your
existing record collection as well as the latest
CD recordings.

The HK 3370’s powerful amplifier uses
traditional Harman Kardon High-Current Design
philosophies to meet the wide dynamic range
of any program selection.

Harman Kardon invented the high-fidelity
receiver more than forty-seven years ago.With
state-of-the-art features and time-honored cir­cuit designs,the HK 3370 is one of the finest
receivers ever offered by Harman Kardon.

■ Harman Kardon-Designed High-

Current, Ultrawide-Bandwidth
Amplifier

■ Phono Input Section

■ Speaker 1/Speaker 2 outputs for high-

quality sound in two locations

■ Pre-Out/Main-In jacks for use with

external amplifiers, equalizers or
speaker processors

■ Subwoofer Output

Important Safety Information

Verify Line Voltage Before Use

YourHK 3370 has been designed for use with
120-voltAC current. Connection to a line volt­age other than that for which it is intended can
create a safety and fire hazard, and may dam­age the unit.

If you have any questions about the voltage
requirements for your specific model, or about
the line voltage in your area, contact your sell­ing dealer before plugging the unit into a wall
outlet.

Do Not Use Extension Cords

To avoid safety hazards,use only the power
cord attached to your unit.We do not recom­mend that extension cords be used with this
product.As with all electrical devices, do not
run power cords under rugs or carpets or place
heavy objects on them. Damaged power cords
should be replaced immediately with cords
meeting factory specifications.

Handle the AC Power Cord Gently

When disconnecting the power cord from an
AC outlet,always pull the plug,never pull the
cord. If you do not intend to use the unit for
any considerable length of time,disconnect the
plug from the AC outlet.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: To prevent electric shock,

do not use this (polarized)

plug with an extension cord,

receptacle or other outlet

unless the blades can

be fully inserted to

prevent blade exposure.

The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated

“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.

The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the

literature accompanying the appliance.

4 SAFETY INFORMATION

Safety Information

Do Not Open the Cabinet

There are no user-serviceable components
inside this product. Opening the cabinet may
present a shock hazard, and any modification
to the product will void your guarantee.If water
or any metal object such as a paper clip,wire
or staple accidentally falls inside the unit, dis­connect it from the AC power source immedi­ately,and consult an authorized service station.

CATV or Antenna Grounding

If an outside antenna or cable system is con­nected to this product, be certain that it is
grounded so as to provide some protection
against voltage surges and static charges.
Section 810 of the National Electrical Code,
ANSI/NFPA No.70-1984,provides information
with respect to proper grounding of the mast
and supporting structure,grounding of the
lead-in wire to an antenna discharge unit, size
of grounding conductors,location of antenna
discharge unit, connection to grounding elec­trodes and requirements of the grounding elec­trode.

NOTE TO CATV SYSTEM INSTALLER:This
reminder is provided to call the CATV (Cable TV)
system installer’s attention to article 820-40 of
the NEC that provides guidelines for proper
grounding and, in particular,specifies that the
cable ground shall be connected to the ground­ing system of the building, as close to the point
of cable entry as possible.

Installation Location

■To assure proper operation, and to avoid the
potential for safety hazards,place the unit
on a firm and level surface.When placing the
unit on a shelf,be certain that the shelf and
any mounting hardware can support the
weight of the product.

■ Make certain that proper space is provided
both above and below the unit for ventila­tion. If this product will be installed in a cab­inet or other enclosed area, make certain
that there is sufficient air movement within
the cabinet. Under some circumstances a fan
may be required.

■ Do not place the unit directly on a carpeted
surface.

■Avoid installation in extremely hot or cold
locations,or an area that is exposed to direct
sunlight or heating equipment.

■Avoid moist or humid locations.

■ Do not obstruct the ventilation slots on the

top of the unit, or place objects directly over
them.

Cleaning

When the unit gets dirty,wipe it with a clean,
soft, dry cloth. If necessary, wipe it with a soft
cloth dampened with mild soapy water,then a
fresh cloth with clean water.Wipe dry immedi­ately with a dry cloth. NEVER use benzene,
aerosol cleaners,thinner,alcohol or any other
volatile cleaning agent. Do not use abrasive
cleaners,as they may damage the finish of
metal parts.Avoid spraying insecticide near the
unit.

Moving the Unit

Before moving the unit, be certain to discon­nect any interconnection cords with other com­ponents,and make certain that you disconnect
the unit from the AC outlet.

Important Information For the User

NOTE:This equipment has been tested and
found to comply with the limits for a Class-B
digital device,pursuant to Part 15 of the FCC
Rules.The limits are designed to provide rea­sonable protection against harmful interference
in a residential installation.This equipment gen­erates,uses and can radiate radio-frequency
energy and, if not installed and used in accor­dance with the instructions,may cause harmful
interference to radio communication.However,
there is no guarantee that harmful interference
will not occur in a particular installation.
If this equipment does cause harmful interfer­ence to radio or television reception,which can
be determined by turning the equipment off
and on, the user is encouraged to try to correct
the interference by one or more of the
following measures:

■ Reorient or relocate the receiving antenna.

■ Increase the separation between the equip-

ment and receiver.

■ Connect the equipment into an outlet on a
circuit different from that to which the
receiver is connected.

■ Consult the dealer or an experienced
radio/TV technician for help.

This device complies with Part 15 of the FCC
Rules.Operation is subject to the following two
conditions: (1) this device may not cause harm­ful interference, and (2) this device must accept
interference received, including interference that
may cause undesired operation.

NOTE:Changes or modifications may cause this
unit to fail to comply with Part 15 of the FCC
Rules and may void the user’s authority to
operate the equipment.

Unpacking

The carton and shipping materials used to pro­tect your new receiver during shipment were
specially designed to cushion it from shock and
vibration.We suggest that you save the carton
and packing materials for use in shipping if you
move,or should the unit ever need repair.

To minimize the size of the carton in storage,
you may wish to flatten it.This is done by care­fully slitting the tape seams on the bottom and
collapsing the carton down to a more two­dimensional appearance.Other cardboard
inserts may be stored in the same manner.
Packing materials that cannot be collapsed
should be saved along with the carton in a
plastic bag.

If you do not wish to save the packaging mate­rials,please note that the carton and other sec­tions of the shipping protection are recyclable.
Please respect the environment and discard
those materials at a local recycling center.

5 FRONT PANEL CONTROLS

1 Main Power Switch: Press this button
to apply power to the HK 3370.When the
switch is pressed in, the unit is placed in a
Standby mode,as indicated by the amber LED

3 surrounding the System Power
Control 2.This button MUST be pressed in

to operate the unit.To turn the unit off and pre­vent the use of the remote control, this switch
should be pressed until it pops out from the
front panel so that the word “OFF”may be
read at the top of the switch.

NOTE:In normal operation this switch is left in
the “ON” position.

2 System Power Control:When the
Main Power Switch1is “ON,” press this

button to turn on the HK 3370; press it again
to turn the unit off.Note that the Power
Indicator surrounding the switch 3will
turn green when the unit is on.

3 Power Indicator:This LED will illumi-
nate in amber when the unit is in the Standby
mode to signal that the unit is ready to be
turned on.When the unit is in operation, the
indicator will briefly turn red, and then change
to green.A red indicator during normal opera­tion means that the unit is in the Protect mode,
and should be turned off and then checked for
a possible speaker-wire short circuit.

4 Headphone Jack: This jack may be
used to listen to the HK 3370’s output through a
pair of headphones.Be certain that the head­phones have a standard 1⁄4" stereo phone plug.

5 Mute: Press this button to momentarily
silence the speaker output of the HK 3370.

6 Speaker 1 Button: Press this button to
turn the speakers connected to the Speaker 1
output terminals ‡ on or off.

7 Speaker 2 Button: Press this button to
turn the speakers connected to the Speaker 2
output terminals ° on or off.

Front Panel Controls

21

MEMORY PRESET

SLEEP

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TUNED ST

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8) @$ ^

*

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2

1

3

4

5

6

1 Main Power Switch
2 System Power Control
3 Power Indicator
4 Headphone Jack
5 Mute
6 Speaker 1 Selector
7 Speaker 2 Selector
8 Phone Input Selector
9 T-Mon Input Selector

) Tuning Button
! Tape Input Selector
@ Preset Scan
# CD Input Selector
$ Aux Input Selector
% Preset Selector
^ Dimmer Button
& FM/AM Selector
* FM Mode Selector

( Sleep Button
Ó Bass Control
Ô Treble Control
 Balance Control
Ò Volume Control
Ú Volume/Mute Indicator
Û Information Display
Ù Speaker Selection Indicators
ı Remote Sensor Window

6 FRONT PANEL CONTROLS

Front Panel Controls

8 Phono Input Selector: Press this but-
ton to select the output of a turntable that is
connected to the Phono inputs§.

9 T-Mon Input Selector: Press this
button to listen to the output of a tape
recorder connected to the Tape Monitor
inputsª. The T-Mon indicator will illuminate
to indicate that the input source is being
monitored when the HK 3370 is connected to
a three-head tape deck or another unit with
off-head playback.

) Tuning Button: Press the left side of the
button to tune lower frequency stations and the
right side of the button to tune higher frequency
stations.When a station with a strong signal is
tuned, the TUNED indicator will illuminate in
the Information Display Û.A brief (1/2
second) press of the button will manually tune
to the next frequency increment, while pressing
and holding the button for a longer period will
automatically tune to the next station with a
signal strong enough for acceptable reception.

! Tape Input Selector: Press this button
to listen to the output of a tape recorder or other
device connected to the Tape 2inputs ⁄.

@ Preset Scan: Press this button to auto-
matically scan through the stations that have
been programmed in the HK 3370’s memory.
The tuner will play five seconds of each station
before moving to the next preset station.To
stop the scan when the desired station is
heard, press the button again. (See page 14 for
more information on the tuner memory system.)

# CD Input Selector: Press this button
to listen to the output of a CD player connected
to the CD inputs ¶.

$ Aux Input Selector: Press this button
to listen to the output of a device connected to
the Aux inputs •.

% Preset Selector: Press this button to
step up or down through the list of stations
that has been entered into the preset memory.
(See page14 for more information on tuner
programming.)

^ Dimmer Button: Press this button to
dim the front panel displays and indicators.The
first press of the button will dim the displays to
one-half normal brightness; the next press will
turn all displays off except for the Power

Indicator 3 and the Speaker
Selection Indicators Ù. Note that when

the panel is dimmed, it will return to normal
brightness after the unit is turned off,then on
again.

& FM/AM Selector: Press this button to
select the tuner as the input to the receiver.
When the tuner is in use,press this button to
change between the AM and FM frequency
bands.

* FM Mode Selector: Press this button
to select the stereo or mono mode for FM tun­ing. In the STEREO mode,a Stereo indicator
will illuminate in the Information Display
Û, and stereo reception will be provided when
stations are transmitting stereo signals.In the
MONO mode,the left and right signals from
stereo broadcasts will be mixed together and
reproduced through all channels.Select MONO
for better reception of weak signals.

( Sleep Button: Press this button to place
the unit in the Sleep mode.Each press of the
button selects the amount of time that will
remain before the unit automatically goes
into the Standby mode,as shown in the
Information Display Û,in the following
order:

Ó Bass Control: Turn this control to modi-
fy the low-frequency output of the left/right
channels by as much as ±10dB.Set this control
to a suitable position for your taste and room
acoustics.

Ô Treble Control:Turn this control to
modify the high-frequency output of the
left/right channels by as much as ±10dB.Set
this control to a suitable position for your taste
and room acoustics.

 Balance Control: Turn this control to
change the relative volume for the front
left/right channels.

Ò Volume Control:Turn the knob clock-
wise to increase volume,counterclockwise to
decrease the volume.

Ú Volume/Mute Indicator: This indicator
will glow green when the HK 3370 is turned
on. Its position will enable you to judge the
relative volume of the unit even when the
speakers are muted or turned off.When the
indicator is pointing toward the left,at an
“8 o’clock” position, the volume is low; when
it is pointing to the right, as in a “3 o’clock”
position, the volume is loud.When the unit has
been muted by pressing the Mute button 5

®, the indicator will flash.
Û Information Display:This display

delivers messages and status indications to
help you operate the receiver.

Ù Speaker Selection Indicators:

These indicators light as a green LEDnext to
the designation for each speaker pair to show
when they are active.Press the Speaker 1
7 or Speaker 2 7 Selectors to activate
either pair of speakers.

ı Remote Sensor Window: The sensor
behind this window receives infrared signals
from the remote control.Aim the remote at this
area and do not block or cover it unless an
external remote sensor is installed.

90

min80min70min60min50min

40

min

30

min20min10min

OFF

7 REAR PANEL CONNECTIONS

Rear Panel Connections

AC 120V 60HZ

400W

(120V, 60Hz)

IN

FM
75 Ω

AM
LOOP

IN IN IN PLAY REC. OUT PLAY REC. OUT MONO

RIGHT LEFT

SUB OUTPRE OUTMAIN INTAPE MON. TAPE 2AUXCDPHONO

OUT

L

R

GND

SPEAKER 1 (8 Ohms)

SPEAKER 2 (8 Ohms)

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¢
∞

¡

™

‹

›

fi

‚

⁄

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ª

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¶

fl

‡

a

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°

£

¡ AM Antenna
™ FM Antenna
£ Phono Ground
¢ Remote IR In
∞ Remote IR Out

§ Phono Inputs
¶ CD Inputs

• Aux Inputs
ª Tape Monitor Play/In
‚ Tape Monitor Record/Out
⁄ Tape 2 Play/In
¤ Tape 2 Record/Out
‹ Main In
› Pre-Out/Main-In Jumper Pins

fi Preamp Out
fl Subwoofer Out
‡ Speaker 1 Terminals
° Speaker 2 Terminals

· Accessory Outlets
a Power Cable

8 REAR PANEL CONNECTIONS

Rear Panel Connections

¡ AM Antenna: Connect the AM loop
antenna supplied with the receiver to these
terminals.If an external AM antenna is used,
make connections to the AM and GND
terminals in accordance with the instructions
supplied with the antenna.

™ FM Antenna: Connect an indoor or
external FM antenna to this terminal.

£ Phono Ground: Connect the ground
wire from a turntable to this terminal to reduce
system hum.

¢ Remote IR In: If the HK 3370’s front
panel IR sensor is blocked due to cabinet doors
or other obstructions,an external IR sensor may
be used. Connect the output of the sensor to this
jack.

∞ Remote IR Out: This connection permits
the IR sensor in the receiver to serve other
remote controlled devices.Connect this jack to
the “IR IN”jack on Harman Kardon or other
compatible equipment.

§ Phono Inputs: Connect the outputs of

your turntable or tone arm to these jacks.Note
that only Moving Magnet (MM) type cartridges
may be used.

¶ CD Inputs: Connect these jacks to the
output of a compact disc player or CD changer.

• Aux Inputs: Connect these jacks to the

line-level output of any audio device such as a
TV, cable converter or portable audio player.

ª Tape Monitor Play/In: Connect these
jacks to the Play/Out jacks of an audio recorder.

‚ Tape Monitor Record/Out: Connect
these jacks to the Rec/In jacks of an audio
recorder.

NOTE:When these jacks are connected to a
three-head recorder or another device with off­head playback, it will be possible to monitor
the source being recorded.

⁄ Tape 2 Play/In: Connect these jacks to
the PLAY/OUT jacks of a second audio recorder.

¤ Tape 2 Record/Out: Connect these
jacks to the Rec/In jacks of a second audio
recorder.

‹ Main In: These jacks are the input to the
HK3370’s power amplifier. Unless an external
power amplifier is used,the jumper pins should
remain connected to the Preamp Out jacks ›.

› Pre-Out/Main-In Jumper Pins:

These pins connect the receiver’s preamp and
amplifier sections.Unless an external amplifier,
equalizer or speaker processor is used,they should
be left connected.See page 12 for more informa­tion on external amplifier connections.

fi Preamp Out: These jacks provide an
output for the left and right channels to an
optional external amplifier. In normal opera­tion, unless an external power amplifier is
used, the jumper pins should remain connected
to the Main In jacks ‹.

fl Subwoofer Out: Connect these jacks to
the line level input of a powered subwoofer.If
an external subwoofer amplifier is used, connect
this jack to the subwoofer amplifier input.When
a single,mono subwoofer is used, make the
connection to the bottom jack.

‡ Speaker 1 Terminals:Connect these
terminals to the appropriate terminals on your
speakers.

° Speaker 2 Terminals:Connect these
terminals to the appropriate terminals on your
speakers.

· Accessory Outlets: These outlets may
be used to power low-current draw devices
such as CD players or cassette decks.The power
to these outlets remains on as long as the
receiver itself is on.When the receiver is turned
off,or placed in the Standby mode, power to
these outlets is removed.

NOTE:The power consumption of the devices
plugged into these outlets should not exceed
100 watts.

a Power Cable: Connect the AC plug to a
nonswitched AC wall output.

9 REMOTE CONTROL FUNCTIONS

Remote Control Functions

ON OFF

MASTER VOL.

1

2

3

4

79

8

0

5

6

TAPE 2

TUNING

DWN - TUNING - UP

MAIN POWER

12

SPEAKER

P. SCAN MUTE

SLEEP

DIMMER

DIRECT MEMORY

PRESET

AUTO CLEAR

HK 3370 RC

PHONO TAPE MON

AUX AM FMCD

DWN - PRESET - UP

/

DISC SKIP FM MODE

Ñ

ø

å

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˙

˚

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µ

π

∫

ç

∂

≠

ƒ

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∑

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ß

†

∆

å Main Power On
∫ Main Power Off
ç Source Selectors
∂ Preset Up/Down
≠ Transport Controls
ƒ Disc Skip
© Sleep Button
˙ Dimmer Button
î Tuning
∆ Direct Button
˚ Numeric Keys
¬ Auto Preset
µ Secondary Control Cover
Ñ Clear Button
ø Memory Button
π Master Volume
œ P.Scan Button
® Mute Button
ß FM Mode Button
† Tuning Up/Down
Ü Speaker 1 Selector
√ Speaker 2 Selector
∑ Transmitter Window

10 REMOTE CONTROL FUNCTIONS

Remote Control Functions

å Main Power On:When the HK 3370
is in the Standby mode,as indicated by the
Power Indicator3 glowing amber,press
this button to turn the HK 3370 on.

∫ Main Power Off:When the HK 3370 is
turned on, press this button to place it in the
Standby mode.Note that in this condition,
the unit is still connected to AC Power.

ç Source Selectors: Press these buttons
to select an input source for the HK 3370.

∂ Preset Up/Down:When the tuner is in
use,these buttons scroll through the stations
that have been programmed into the HK 3370’s
memory.These buttons also control the track Skip
Up and Down on compatible Harman Kardon
compact disc players/changers.

≠ Transport Controls:These buttons are
used to control Play,Play Forward,Play Reverse,
Stop,Pause and Record functions on compatible
Harman Kardon compact disc players/changers
and cassette tape decks.

ƒ Disc Skip: These buttons do not have
any functions when controlling the HK 3370,
but they operate the Disc Skip functions of com­patible Harman Kardon compact disc changers.

© Sleep Button: Press this button to place
the unit in the Sleep mode.Each press of the
button selects the amount of time that will
remain before the unit will automatically go
into the Standby mode,as shown in the
Information Display Û, in the following
order:

˙ Dimmer Button: Press this button once
to reduce the brightness of the front panel dis­play to half the normal intensity.Press it again
to turn the front panel display completely off.
When the display is completely off,press the
button to return to normal brightness.

î Tuning:Press these buttons to tune up or
down through a selected frequency band.

∆ Direct Button: Press this button to
select a radio station by entering its frequency
using the Numeric Keys K. (See page13
for more information.)

˚ Numeric Keys:These buttons serve as
a ten-button numeric keypad to enter tuner
preset positions or to tune stations directly.

¬ Auto Preset:When the tuner and FM
band have been selected, this button may be
used to automatically program the tuner presets
for all active stations.To start the auto preset
scan, press and hold the button. Note that the
MEMO and PRESET indicators will flash.After
a few seconds,the tuner will start to “look” for
active stations,as shown by increasing frequen­cy numbers in the Information Display.Release
the button and note that the tuner will briefly
stop at each active station and add a preset
number to the memory.If the FM tuner finds
fewer than 30 FM stations with acceptable sig­nal strength, the Auto Preset tuning will scan
two more cycles or until the remaining vacant
preset memory spaces have been filled with
those found in the first scan.The scan will stop
when all 30 preset memory spaces have been
filled or when three scans through the band
have been completed.

µ Secondary Control Cover:This slid­ing cover normally is in the “up”position so
that it hides the secondary controls.To access
these controls,place your thumb on the small
recessed area at the top center of the control,
and gently press the cover down and towards
you.

Ñ Clear Button: This button is used to clear
preset memory information for the HK 3370’s
tuner.(See page 1 4 for more information on
tuner presets.)

ø Memory Button: Press this button to
open a memory position that stores a preset
location for the HK 3370’s tuner. (See page14
for more information on tuner presets.)

π Master Volume:Press these buttons to
raise or lower the HK 3370’s volume.

œ P. Scan Button: Press this button to
automatically scan through the list of stations
that are programmed into the HK 3370’s tuner
memory.When the button is pressed, each pre­set station will play for five seconds before the
next station is selected. Press the button again
when the desired station is heard to stop the
preset scan.

® Mute Button: Press this button to
momentarily silence the HK 3370.

ß FM Mode Button: Press this button
when the tuner is in use in the FM band to
switch to monaural reception if the station is
weak and noisy.(See page13 for more
information.)

† Tuning Up/Down:When the tuner is in
use,these buttons will tune up or down through
the selected frequency band.A brief (1⁄2 second)
press of the button will manually tune to the
next frequency increment, while pressing and
holding the button for a longer period will auto­matically tune to the next station with a signal
strong enough for acceptable reception.These
buttons will also control Fast Forward and
Fast Reverse (or Rewind) for compatible
Harman Kardon compact disc players/changers
and cassette tape decks.

Ü Speaker 1 Selector: Press this button
to turn the speakers connected to the Speaker 1
Output terminals ‡ on or off.

√ Speaker 2 Selector: Press this button
to turn the speakers connected to the Speaker 2
Output terminals ° on or off.

∑ T ransmitter Window: Point this area of
the remote toward the receiver when using the
remote.

90

min80min70min60min50min

40

min

30

min20min10min

OFF

System Installation

After unpacking the unit, and placing it on a
solid surface capable of supporting its weight,
you will need to make the connections to your
audio and video equipment.These steps need
to be done only when the receiver is first
installed, or when a change is made to the
input source equipment.

Audio Equipment Connections

We recommend that you use high-quality inter­connect cables when making connections to
source equipment and recorders to preserve the
quality of the signals.

When making connections to audio source
equipment or speakers it is always a good prac­tice to unplug the unit from the AC wall outlet.
This prevents any possibility of accidentally
sending audio or transient signals to the speak­ers that may damage them.

1. Connect the analog output of a CD player to
the CD inputs ¶.

NOTE:When the CD player has both fixed and
variable audio outputs,it is best to use the
fixed output unless you find that the input to
the receiver is so low that the sound is noisy,or
so high that the signal is distorted.

2. Connect the Play/Out jacks of a cassette
deck, MD or other audio recorder to the Tape
Monitor In jacks ª. Connect the Record/In
jacks on the recorder to the Tape Monitor
Out jacks ‚ on the HK 3370.When the tape
deck connected to these jacks is a three-head
unit or has off-head playback, it will be possible
to monitor the output of the source being
recorded.

3. Connect the output of a second audio
recorder,VCR or other line-level audio device to
the Tape 2 Play/In jacks ⁄. If a recorder is
used, connect its Rec/In jacks to the matching
outputs ¤.

4.The output of any electronics product with a
line-level output, such as a TV set,satellite
receiver or DVD,may be connected to the Aux
jacks •.

5. Connect the outputs of a turntable with a
moving magnet cartridge to the Phono inputs

§.To insure that the phono playback is noise­free,connect the ground wire from the tone
arm to the Phono Ground terminal £.

6.Assemble the AM Loop Antenna supplied
with the unit as shown below.Connect it to the
AM screw terminals ¡.

7. Connect an FM antenna to the FM
(75 ohm) connection ™. The FM antenna
may be an external roof antenna, an inside
powered or wire lead antenna or a connection
from a cable TV system.Note that if the anten­na or connection uses 300-ohm twin-lead
cable,you must use the 300-ohm-to-75-ohm
adapter supplied with the unit to make the
connection.

Speaker and Output Connections

To assure that all the audio signals are carried
to your speakers without loss of clarity or reso­lution, we suggest that you use high-quality
speaker cable.Many brands of cable are avail­able,and the choice of cable may be influenced
by the distance between your speakers and this
receiver,the type of speakers you use,personal
preferences and other factors.Your dealer or
installer is a valuable resource to consult in
selecting the proper cable.

Regardless of the brand of cable selected,we
recommend that you use a cable constructed of
fine,multistrand copper with a gauge of 14 or
smaller.Remember that in specifying cable,the
lower the number,the thicker the cable.

Cable with a gauge of 16 may be used for
short runs of less than ten feet.We do not rec­ommend that you use cables with an AWG
equivalent of 18 or higher due to the power
loss and degradation in performance that will
occur.

Cables that are run inside walls should have
the appropriate markings to indicate listing
with UL, CSA or other appropriate testing
agency standards.Questions about running
cables inside walls should be referred to your
installer or a licensed electrical contractor who
is familiar with the NEC and/or the applicable
local building codes in your area.

When connecting wires to the speakers,
be certain to observe proper polarity.
Remember to connect the “negative”or
“black” wire to the same terminal on the
receiver and the speaker. Similarly,the “posi­tive” or “red”wire should be connected to the
like terminal on the HK 3370 and speaker.

We also recommend that the length of cable
used to connect speaker pairs be identical.For
example,use the same length piece of cable to
connect the front left and front right or sur­round left and surround right speakers,even if
the speakers are a different distance from the
HK 3370.

NOTE:While most speaker manufacturers
adhere to an industry convention of using black
terminals for negative and red ones for positive,
some manufacturers may vary from this config­uration.To assure proper phase,and optimal
performance,consult the identification plate on
your speaker, or the speaker’s manual to verify
polarity.If you do not know the polarity
of your speaker, ask your dealer for
advice before proceeding, or consult
the speaker’s manufacturer.

Connect the speakers using the following steps:

1.

Connect the main speakers to the Speaker 1

terminals ‡.

2.

Connect a second set of speakers,or speakers
that are in a second room location, to the
Speaker 2 terminals °.

3.When an optional, powered subwoofer is
used, connect the outputs of the Subwoofer
Out jacks fl to the line-level inputs of the
subwoofer.When the subwoofer’s amplifier has
stereo inputs,run interconnects from both
jacks.When the subwoofer has a mono input
only,use the bottom jack for the connection.
When a passive subwoofer is used, these con­nections will be made to the optional amplifier
that powers the subwoofer.

11 INSTALLATION AND CONNECTIONS

Installation and Connections

12 INSTALLATION AND CONNECTIONS

Installation and Connections

System and Power Connections

The HK 3370 is designed for flexible use with
external control components and power ampli­fiers.These connections are easy to make dur­ing an initial installation, or at a later date
should you choose to upgrade your system.

Remote Control Extension

If the receiver is placed behind a solid or
smoked glass cabinet door, the obstruction may
prevent the remote sensor from receiving com­mands.In this event, an optional remote sensor
may be used. Connect the output of the remote
sensor to the Remote IR In jack ¢.

If other components are also prevented from
receiving remote commands,only one sensor is
needed.They may use this unit’s sensor or a
remote eye by running a connection from the
Remote IR Out jack ∞ to the Remote In
jack on Harman Kardon or other compatible
equipment.

External Audio Power Amplifier
Connections

If desired, an optional, external amplifier may
be used in place of the HK 3370’s internal
power amplifier.

To connect an external power amplifier, first
remove the Pre-Main Jumper Pins ›
that connect the Preamp Out fi and
Main In ‹ jacks on the rear panel. Keep the
jumpers in a safe place should they be needed
at a later time.

Using high-quality audio interconnect cables,
connect the Preamp Out jacks fi to the
input jacks on your power amplifier.Make cer­tain to match the right output to the right input
and the left output to the left input.

Note that when an external power amplifier is
used, no special adjustments are required.All
volume and other control adjustments are
made using the standard front panel or remote
controls.

AC Power Connections

The Accessory Outlets · receive power
as long as the receiver is turned on. Power to
these outlets is removed when the unit is in the
Standby mode,or when the Main Power
Switch 1 is in the “OFF”position.

Speaker Placement

For optimal listening enjoyment,and for sound­field reproduction that best re-creates the origi­nal recording, it is good practice to place the
speakers so that they form a triangle with the
speakers at the front of the room,and the pre­ferred listening spot at the third point of the tri­angle.The distance between each speaker and
the listener should be identical.

For example,if the speakers are 10 feet from
one another,each of the speakers should opti­mally be placed so that they are also 10 feet
from the listener.It is also desirable to place
speakers so that their tweeters,or high­frequency drivers are aimed at ear height
when you are seated in the listening position.

A good starting point for speaker placement is
to make the distance between the two speakers,
and the distance between either speaker and the
listener, identical.

To optimize the sound field,or to suit your lis­tening room environment, you may find that
some experimentation is required to find the
correct location. Ideally,pans from left to right
across the front of the room should sound
smooth, and instruments should appear to be
coming from the proper location to where they
would be placed in an orchestra.

The placement of subwoofers should be done
as suggested in the manufacturer’s instructions.
In general,subwoofers often produce best
results when they are placed in the corner of a
room, but optimal placement will vary widely
depending on room size,the subwoofer type
and the placement of rugs and furniture in a
room.

Finally,when all connections are complete, plug
the power cord into a nonswitched 12 0-volt AC
wall outlet.You’re ready to enjoy the HK 3370!

Right Front

Speaker

Left Front

Speaker

13 OPERATION

Basic Operation

Once you have completed the setup and config­uration of your new receiver,it is simple to
operate and enjoy.The following instructions
will provide the steps needed to enjoy the
HK 3370:

• Install the two supplied AAA batteries in the
remote as shown. Be certain to observe the (+)
and (–) polarity indicators shown in the bottom
of the battery compartment.

• When using the HK 3370 for the first time,it
is necessary to press the Main Power button
1 on the front panel to turn the unit on. This
places the unit in a standby mode,as indicated
by the amber color of the Power Indicator

3.Once the unit is in standby, you may begin
a listening session by pressing the System

Power Control 2 on the front panel or the
Main Power On button å on the remote.

Note that the Power Indicator 3 will turn
red, then green.This will turn the unit on and
return it to the input source that was last used.
The unit may also be turned on from standby by
pressing any of the Source Selector but-
tons on the front panel 89!#$&
or remote ç.

To turn the unit off at the end of a listening
session simply press the System Power

Control 2 on the front panel or the Main
Power Off button ∫ on the remote.This

places the unit in the Standby mode,and the
Power Indicator 3 will turn amber to
remind you that the unit is ready for operation
when a power command is received from the
remote.

When the remote is used to turn the unit “off”
it is actually placing the system in a standby
mode,as indicated by the amber color of the
Power Indicator 3.

When you will be away from home for an
extended period of time it is always a good
idea to completely turn the unit off using the
front panel Main Power Switch 1.

• To dim the brightness of the front panel dis­play,press the Dimmer button ˙ on the
front panel ^.The first press will dim the
lights to half normal.A second press will turn
the display completely off.Press the Dimmer
button ^˙ again to restore the display to
normal brightness.

Source Selection

• To select a source at any time, press any of
the Source Selector buttons on the remote
ç or front panel 89!#$&.

• During a listening session you may wish to
adjust the Bass Ó, Treble Ô and
Balance  controls to suit your listening
tastes.

• Adjust the volume to a comfortable level
using the front panel Volume Control Ò
or remote Master V olume Up/Down π
buttons.

• To temporarily silence all speaker outputs
press the Mute button ®5.This will cut the
output to all speakers,but it will not affect any
recording or dubbing that may be in progress.
When the system is muted, the MUTE indicator
will light in the Information Display Û
and the Volume/Mute indicator Ú will
flash. Press the Mute button ®5again to
return to normal operation.

• For private listening,plug the 1/4" stereo
phone plug from a pair of stereo headphones
into the front panel Headphone jack 4.

• One or two separate sets of speakers may be
connected to the HK 3370.To listen to one of
the speaker sets press the Speaker buttons
67 on the front panel corresponding to the
desired speakers. The active speakers will be
indicated by a lit green LED in the Speaker
Indicators Ù.Both speakers may be turned
off for private headphone listening.

• To program the HK 3370 for automatic turn
off,press the Sleep button on the front panel
( or remote ©. Each press of the button will
increase the time before shut down in the fol­lowing sequence:

The sleep time will be displayed in the
Information Display and it will count down
until the time has elapsed.

When the programmed time has elapsed the
unit will automatically turn off.Note that the
front panel display will dim to one half bright­ness when the Sleep function is programmed.
To cancel the Sleep function,press the Sleep
button ( until the Sleep indicator numbers
disappear and the Information Display shows
the current source.Pressing any control button
while the Sleep control is activated will momen­tarily return the Information Display to full
brightness for increased legibility without inter­rupting the Sleep function.

Tuner Operation

The HK 3370’s tuner is capable of tuning AM,
FM and FM Stereo broadcast stations.Stations
may be tuned manually,or they may be stored
as favorite station presets and recalled from a
30-position memory.

Station Selection

1.Press the AM/FM & buttons on the front
panel or on the remote ç to select the tuner
as an input.

2.Press these buttons again at any time to
switch between AM and FM.

3.To select stations,press, and briefly hold, the
Tuning button )†and the tuner will
search for the next highest or lowest frequency
station that has an acceptable signal.To tune
to the next station, press the button again.Tap
the Tuning button )†to advance one
frequency increment at a time,or press and
hold it to locate a specific station.When the
TUNED indicator illuminates, the station is
properly tuned and should be heard with clarity.

4.Stations may also be tuned directly by press­ing the Direct button J, and then pressing
the Numeric Keys K that correspond to
the station’s frequency.The desired station will
automatically be tuned.

NOTE:When the FM reception of a station is
weak, audio quality will be increased by switch­ing to Mono mode by pressing the FM Mode
button *ßuntil the STEREO indicator goes
out.

90

min80min70min60min50min

40

min

30

min20min10min

OFF

Operation

14 OPERATION

Operation

Preset T uning

Up to 30 stations may be stored in the
HK 3370’s memory for easy recall using the
front panel controls or the remote.

To enter a station to the memory, first tune the
station using the steps outlined above.Then:

1.Press the Memory button O on the
remote.Note that MEMO and PRESET
indicators will illuminate and flash in the
Information Display.

2.Within five seconds, press the Numeric
Keys K corresponding to the location where
you wish to store this station’s frequency.

3.Repeat the process after tuning any addition­al stations to be preset.

Auto Preset

• Preset stations may also be programmed
automatically for the FM band.To automatically
enter each station that may be tuned with
acceptable quality into the HK 3370’s preset
memories,first select the FM band. Next, press
and briefly hold the Auto Preset button L
until the MEMO and PRESET indicators begin
to flash, and the station frequency indication
begins to increase.Release the button and note
that the tuner will search the entire FM band,
and stop briefly at each station that has accept­able signal strength.The HK 3370 will automat­ically assign a preset number to each station,
and then search for the next station.The auto­matic scan process will stop when all 30 preset
memory locations have been filled or the entire
FM band has been scanned three times.

NOTE:Using the automatic tuning mode in
areas with more than 30 FM stations will com­pletely fill the preset memories,and over-write
any previously memorized presets for either AM
or FM stations.

TIP:The automatic scan process may enter sta­tions that you do not wish to retain in the
memory,or it may enter a station on more than
one frequency if the signal is too strong.These
unwanted stations may be removed from the
memory using the Preset Clear function out­lined below.

Recalling Preset Stations

• To manually select a station previously
entered in the preset memory,press the
Numeric Keys K that correspond to the
desired station’s memory location.

• To manually tune through the list of stored
preset stations one by one

, press the Preset

buttons %∂on the front panel or remote.

• To automatically scan through the stations
entered in the preset memory,press the
Preset Scan button @œon the front
panel or remote.The tuner will run through the
list of preset stations,stopping for five seconds
at each one.Press the button again to stop the
scan at your desired station.

Clearing Preset Stations

Unwanted preset stations may be erased from
the unit’s memory to make it easier to tune
only those stations you want.

To remove a preset station from the HK 3370’s
tuner memory,first tune to the station using
the Preset Scan button @œon the front
panel or remote,or by entering the preset num­ber directly,using the Numeric Keys K.

When the preset station to be removed has
been tuned, first press the Memory button
O.The MEMO and PRESET indicators in the
Information Display will flash, and the actual
preset number will disappear from the display.
Next, press the Clear button N within five
seconds.

The preset station will be removed from the
memory,and the action will be confirmed by
the brief appearance of the word CLEAR and
the preset number location in the Information
Display.That memory location will now be
empty,and you may program a different station
to that location, or leave it empty.

Tape Recording

In normal operation,the audio source selected
for listening through the HK 3370 is sent to the
Tape Mon Out and Tape 2 Rec Out outputs.This
means that any program you are listening to
may be recorded simply by placing machines
connected to the outputs for Tape Monitor
‚ or Tape 2 ¤ in the record mode.

When a tape recorder with separate record and
playback heads is used, you may monitor the
output of the recording by selecting the

T-Mon Indicator 9ç. Note that the
T-Mon Indicator will illuminate in the
Information Display Û to remind you

that you are listening to the record playback
instead of the actual input source being
recorded.

IMPORTANT NOTE:Please make certain that
you are aware of the copyright restrictions on
any material you copy.

Memory Backup

This product is equipped with a memory backup
system that preserves tuner presets and system
configuration information if the unit is acciden­tally unplugged or subject to a power outage.

Processor Reset

In the rare case where the unit’s operation or
the displays seem abnormal, the cause may
involve the erratic operation of the system’s
memory or microprocessor.

To correct this problem,first unplug the unit
from the AC wall outlet and wait at least three
minutes.After the pause,reconnect the AC
power cord and check the unit’s operation.If
the system still malfunctions,a system reset
may clear the problem.

If the system still does not respond, it may be
necessary to perform a complete reset.To reset
the system, first turn the HK 3370 off by press­ing the Main Power Switch1 and then
releasing it so that it extends out beyond the
front panel and the word “OFF”is visible in red
lettering at the top of the switch.

Next, press and hold the T-Mon and CD
Input Selector buttons 9#on the front
panel ONLY.While holding these buttons in,
press the Main Power Switch1 in until it
latches so that the button is flush with the
front panel.

The Information Display will briefly show the
word RESET, and then return to normal
operation.

Note that when the system is reset in this fash­ion, all tuner presets will be lost and must be
reentered.

If the system is still operating incorrectly,there
may have been an electronic discharge or
severe AC line interference that has corrupted
the memory or microprocessor.

If these steps do not solve the problem, consult
an authorized Harman Kardon service depot.

15 TROUBLESHOOTING GUIDE

Troubleshooting Guide

This unit is designed for trouble-free operation.Most problems users encounter are due to operating errors. So, if you have a problem, first
check this list for a possible solution. If the problem persists, consult your authorized Harman Kardon Service Center.

If the problem is... Make sure that the...

No lights illuminate when POWER button is pressed Unit is plugged into a live outlet

Main power switch is pressed in

No sound is heard Unit has not been muted

Correct input function selector button has been pressed
Volume is turned up
The speakers have been turned on using the Speaker Selectors

No output from one or more channels Cables are not defective: check/replace speaker cables
Tuner sound has a large amount of interference,or The antenna is properly connected

The “Stereo” display is not illuminated, or The antenna is properly located
Tuner sound distorts and/or volume level is too low The antenna is set in the proper direction

The antenna is adequate to receive the desired station

Tuner is intermittent or continuously buzzing or hissing The unit is away from fluorescent lights,TVs, motors and

other electrical appliances

Technical Specifications

Audio Section

Stereo Mode
Continuous Average Power (FTC)

70 Watts per channel,20Hz–20kHz
@ < 0.07% THD,both channels driven into 8 ohms
95 Watts per channel,20Hz–20kHz
@ < 0.2% THD,both channels driven into 4 ohms

Input Sensitivity/Impedance

Linear (High Level) 200mV/47kohms

Signal-to-Noise Ratio (IHF-A) 95dB
Frequency Response

@ 1W (+0dB,–3dB) 10Hz–110kHz

High Instantaneous
Current Capability (HCC) ±42 Amps

Transient Intermodulation
Distortion (TIM) Unmeasurable

Rise Time 16µsec
Slew Rate 40V/µsec

FM T uner Section

Frequency Range 87.5–108MHz
Usable Sensitivity IHF 1.12 µV/13.5dBf
Signal-to-Noise Ratio Mono/Stereo 73/72dB
Distortion Mono/Stereo 0.3/0.4%
Stereo Separation 40dB @ 1kHz
Selectivity ±400kHz,65dB
Image Rejection >80dB
IF Rejection >100dB
Tuner Output Level 1kHz, ±100kHz Dev 500mV

AM T uner Section

Frequency Range 520–1710kHz
Signal-to-Noise Ratio >40dB
Usable Sensitivity Loop 500µV/M
Distortion 1kHz, 50% Mod 0.8%
Selectivity ±10kHz,>25dB

General

Power Requirement AC 120V/60Hz
Power Consumption 72W idle,332W maximum

(both channels driven)

Dimension (Max)

Width 17.4 inches (442mm)
Height 6.1 inches (156mm)
Depth 16.3 inches (415mm)
Weight 24.6 lb (11.2kg)

Depth measurement includes knobs,buttons and terminal connections.
Height measurement includes feet and chassis.
All features and specifications are subject to change without notice.
Harman Kardon is a registered trademark,and Power for the digital
revolution is a trademark,of Harman Kardon, Inc.

250 Crossways Park Drive,Woodbury,New York 11797
www.harmankardon.com
© 2000 Harman Kardon, Incorporated
Part #Y1AR-K2001-02A