Thank you for purchasing the Harman Kardon® HK 3700/3770 stereo receiver, with
which you are about to begin many years of listening enjoyment. The HK 3700/3770
stereo receiver combines the powerful, detailed sound of Harman Kardon two-channel
audio with modern digital connectivity.
To obtain maximum enjoyment from your new receiver, we urge you to take a few
minutes to read through this manual, which:
• Contains a description of the features of HK 3700/3770 stereo receiver
• Lists the items included in the box
• Describes the HK 3700/3770 stereo receiver and its components
• Includes step-by-step instructions that will help you set up and get started
with the HK 3700/3770 stereo receiver
In addition, a few minutes spent learning the functions of various controls will allow
you to take advantage of all the power and refinement of the HK 3700/3770 stereo
receiver. Refer back to this manual as you become more familiar with its features and
operation.
CONTACT US: If you have any questions about the HK 3700/3770 receiver, its installation
or its operation, please contact your retailer or custom installer, or visit our website at:
www.harmankardon.com
Description and Features
Harman Kardon heritage and brand legacy has been its two-channel audio for many
years. As more and more audio content comes from multiple digital-based sources such
as a smart TV, smartphone or tablet, playback convenience becomes the driving factor
in entertainment while sound quality remains the foundation of Harman Kardon. The
new Harman Kardon HK stereo receivers try to bring the best of both worlds: beautiful
two-channel stereo sound and the latest digital-based source access.
The following are the features and benefits of the HK 3700/3770 stereo receivers:
• Harman Kardon sound — This has been the foundation of the brand for
many years. High power, high current capability with stable power output.
Included Items
The complete package of HK 3700/3770 stereo receiver includes the following:
• System remote control
• Connectivity — HK stereo receivers feature the best of both worlds; classic
analog inputs including a phono preamplifier and FM/AM radio as well as
new digital connectivity with Bluetooth, network DLNA, vTuner internet
radio, USB file playback, iOS direct through USB, and coaxial and optical
digital inputs with a premium DAC.
• Distinctive and elegant design — The attractive design of the
HK 3700/3770 is a modern, sleek update to the classic Harman Kardon
receiver.
• Advanced remote control — The new stereo receivers also support
complete control from the Harman Kardon Remote app, available for both
Android and iOS.
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HK 3700/3770
Important Safety Information
• AM loop antenna
• FM wire antenna
• Two AAA batteries
• AC power cord
Handle the AC Power Cord Gently
To disconnect the power cord from an AC outlet, always pull the plug; never pull the
cord. If you do not intend to use your HK 3700/3770 for any considerable length of time,
disconnect the plug from the AC outlet.
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 warranty. 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 center.
CATV or Antenna Grounding
If an outside antenna or cable system is connected to this product, be certain that it
is grounded to provide protection against voltage surges and static charges. Section
810 of the United States 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, which 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.
NOTE: The AC power cord illustration is for the 220 - 240 V model only, the
120 V model has a fixed power cord.
IMPORTANT: If any of the included accessories are missing or any part of
your HK 3700/3770 system fails to operate properly, contact your dealer or
service provider immediately.
Important Safety Information
Verify Line Voltage before Use
The HK 3700/3770 stereo receiver has two different models. One model is 120 V with a
fixed power cord and another is 220 -240 V with a detachable power cord. Connection
to a line voltage other than that for which your HK 3700/3770 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 dealer before plugging the unit into a wall outlet.
Do Not Use Extension Cords
To avoid safety hazards, use only the power cord supplied with your unit. We do not
recommend using extension cords with this product. Do not run power cords under rugs
or carpets, or place heavy objects on them. Damaged power cords should be replaced
immediately by an authorized service center, with a cord meeting factory specifications.
Placing the Stereo Receiver
• Place the stereo receiver on a firm and level surface. Be certain that the
surface and any mounting hardware can support the stereo receiver’s
weight.
• Provide proper space above, below, behind and to the sides of the stereo
receiver for ventilation. Maintain a clearance of at least 12” (30 cm) on each
side, above and behind the unit.
• If you install the stereo receiver in a cabinet or other enclosed area, provide
cooling air within the cabinet. Under some circumstances, you may require
a fan.
• Do not obstruct the ventilation slots on the top of the stereo receiver or
place objects directly over them.
• Do not place the stereo receiver directly on a carpeted surface.
• Do not place the stereo receiver in moist or humid locations, in extremely
hot or cold locations, in areas near heaters or heat registers, or in direct
sunlight.
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HK 3700/3770
HK 3700/3770 Receiver Front Panel Controls
HK 3700
HK 3700/3770 Receiver Front Panel Controls
HK 3770
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HK 3700/3770
HK 3700/3770 Receiver Front Panel Controls
The following are the front panel controls available in the HK 3700/3770 stereo receiver:
1. Power indicator
2. Power switch
3. Play/Pause
4. Menu
5. Back
6. Select previous
7. OK
8. Select next
9. Message Display
10. Tuning
11. Tuner Mode selector
12. Harman Volume
13. Bluetooth
14. Source selector
15. Volume control
16. Headphone output
17. FM/AM
18. USB/iPod
19. USB input port
1. Power indicator: This indicates the status of the stereo receiver whether it is in
operational, standby or OFF mode.
2. Power switch: Press this button to turn the stereo receiver ON or OFF. When the
HK 3700/3770 is in standby mode (the power indicator is amber), press this button to
turn the system ON (the power indicator turns white).
The receiver goes to standby mode automatically through the following:
• For digital sources (Optical/Coaxial), after remaining idle for 15 minutes
• For analog sources (USB/FM/AM/Aux/Phono/DLNA/iPod/Bluetooth), after
8 hours with no user input (for example, adjusting volume, navigating
through menu options and so on)
• Press the power button on the front panel
• Press the OFF button on the remote control or remote app
The receiver can be brought back to operational mode by pressing the:
• Power button on the front panel
5. Back: Press this button to go back to the previous menu.
6. Select previous: Press this button to select the previous file to play or to move left
within menu options.
7. OK: This button is used to make selections within the on-screen menu system for
some source devices. Long press this button to set the FM tuning mode between Auto
and Manual.
8. Select next: Press this button to play the next file or to move right within menu
options.
9. Message Display: Various messages appear in this display in response to commands.
In normal use, the upper line will display the current source and audio input (analog or
one of the digital audio inputs). The lower line displays the current speaker group (if any
are active) and the DSP mode.
10. Tuning: Use these buttons to navigate through the receiver’s menus. When the
radio is the active source, use these buttons to tune stations according to the settings
of the tuner mode selector.
11. Tuner Mode selector: This button toggles between manual (one frequency step
at a time) and automatic (seeks frequencies with acceptable signal strength) tuning
mode. It also toggles between stereo and mono modes when an FM station is tuned in.
Mono mode may improve reception of weaker signals.
12. Harman Volume: This button cycles the Harman Volume function between high,
low and off.
13. Bluetooth (HK 3770 only): The Bluetooth button is used to set the stereo receiver
into Bluetooth pairing mode. You can pair the HK 3770 system with Bluetooth-enabled
devices using this button.
14. Source selector: Press these buttons to select the active source.
15. Volume Control: Turn this knob clockwise to raise the volume and counterclockwise
to lower the volume, which will be shown in decibels (dB) in the Message Display.
16. Headphone output jack: Plug a 1/4’’ headphone into this jack for private listening.
17. FM/AM (HK 3700 only): This is the built-in tuner available in HK 3700 that helps
you select the tuner source input directly. Press this button to toggle between AM and
FM bands.
18. USB/iPod (HK 3700 only): This button helps you select the USB source input
directly. Press this button to toggle between USB and iPod source inputs.
19. USB input port: Connect your USB devices to this port.
• Source button
3. Play/Pause: Press this button to play or pause the audio stream.
4. Menu: Press this button to choose from different menu options.
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