Network & Tuner Functions
Bluetooth & Remote Control
Output Power: The Harman/Kardon HK3770 stereo
receiver features a 120 watt x 2-channel (8-ohms, 20Hz-20kHz, THD 0.07%) amplifier for
great sound quality with little distortion even at high volumes.
High-Resolution 24-bit/192kHz DAC: This stereo receiver is equipped
with a 24-bit/192-kHz DAC for excellent sound quality reproduction that is
Harman Volume: Harman volume is an advanced digital signal processing
technology to control playback volume. It evens out the volume level on
everything you watch, improving your listening experience. Once you choose the
volume level, Harman Volume does the rest. It helps you avoid volume increases
from commercials, volume differences when you change channels or switch sources,
and brings out the dialog.
Analog Inputs/Output: The Harman/Kardon stereo receiver features five
analog stereo RCA inputs to connect up to five audio components, and one stereo
RCA record output to connect to a CD-recorder and other recording device.
Included in the five analog inputs is a Phono input (MM) for vinyl playback.
Digital Inputs: The HK3770 receiver is equipped with two optical
(toslink) digital inputs and one coaxial (RCA) digital input for connection of a
TV or media streaming device.
Phono Input: In addition to the five analog inputs, the stereo
receiver is fitted with a Phono input (MM) for vinyl playback.
A & B Speaker Terminals: This receiver features two sets of speaker
outputs (A & B), each with binding-post terminals. You can independently turn on
or off each pair of speakers, as well as play both pair of speakers. The speaker
pairs are wired internally in parallel. These binding post terminals will accept
bare wire (up to 10AWG), pin-connectors, and banana plugs (single or dual).
Subwoofer Output: The stereo receiver is equipped with a
mono subwoofer output for connecting a powered subwoofer. The output is full-range, so you will need to connect a powered subwoofer with a built-in crossover.
Headphone Jack: There is a full-size (1/4") headphone jack on the
front panel. When headphones are plugged in the speaker outputs are
Network & Tuner Functions
Ethernet LAN Port: The H/K stereo receiver is fitted with a
RJ-45 Ethernet (LAN) port to connect the receiver to your home network to access
your DLNA music server or Internet Radio.
Internet Radio (from vTuner): You can also listen to Internet radio
stations using the vTuner
Internet Radio Station database service particularly customized for this unit,
providing a database of numerous radio stations around the world. You can search
for Internet Radio stations by Location, Genre, New, Popular, or Podcast. You
can store up to 30 of your favorite stations.
DLNA Certified: The HK3770 isDLNA (Digital Living Network Alliance)
1.5 and Windows 7/8 compliant for audio networking. This means it's easier for
you to access and enjoy digital music stored on your PC. Compatible music files
include MP3 (32-320kbps; 8-48kHz) and WMA (5-192kbps; 8-48kHz). You can use your PC to
play music content through your audio system, or use the H/K receiver to browse
and play music files on computer's hard drive. You can control
playback of your streamed audio files from the network receiver's remote
control. The receiver also supports ID3-Tag and META tag information so song
title, artist name, and album name can be displayed from the unit's front-panel
AM/FM Tuner: The Harman/Kardon stereo receiver features a built-in
AM/FM tuner with manual, seek, and preset tuning (auto/manual). You can store up to 30 AM/FM
presets (in any combination). You're able to scan through these presets
(5-seconds each) to help
you search for your favorite music. You also can tune directly to a station
using the numeric keypad on the included remote control.
Front-Panel USB Port: This stereo receiver is equipped with a
front-panel USB (type-A) port that allows you to enjoy playback of MP3
(32-320kbps; 8-48kHz) and WMA (5-192kbps; 8-48kHz) music
files from a USB mass storage class memory device; such as select Android
smartphones (Froyo/Gingerbread OS only), portable MP3 players, or USB
thumbdrives (not compatible with USB HDDs). The USB device must be formatted in
FAT or FAT32. Using the unit's front-panel
display and included remote control, you can browse your stored music files on
your connected USB memory device. USB portable audio devices that can be charged
via USB will be charged when plugged into the network stereo receiver's USB port
Note: This unit does not support AAC or Apple lossless files.
iPod/iPhone Direct: The USB (type-A) port on the front-panel provides
convenient connection for your iPod/iPhone so you can listen to your stored
music and music apps through the H/K stereo receiver. The iPod/iPhone USB
digital connection means that the digital audio signal from your iPod/iPhone is
transmitted directly to the system, minimizing noise interference and allowing
use of the receiver's DAC, not the DAC in your iPod/iPhone. This results in more
precise sound reproduction. You can choose to control your Apple device from its
clickwheel/touchscreen or from the receiver.. Basic playback functions (such as Play/Pause,
Previous/Next Track) can be controlled by the receiver's remote. Song/artist
information on your iPod/iPhone will display on your connected the unit's
front-panel display. Your iPod/iPhone's battery
will be charged while connected to the receiver. Using the Lightning- or
Dock-cable that came with your Apple device to connect directly to the H/K
stereo receiver, iPod/iPhone compatibility is as follows (as of 9/25/2014):
|Apple Device||Generation||Tested Version||Media Type||Control Type||Display Type||Charge|
|Audio||Video||Remote||iPod/iPhone||Artist/Song Text||Track Info |
Note: Apple iPod/iPhone software updates may change
functionality results. If you download a newer software version, you may
need to reset the unit and your iPod/iPhone to regain functionality. If this
doesn't work, you may need to wait until a newer software update is
Built-in Bluetooth: The Harman/Kardon receiver features built-in
Bluetooth with support for profiles A2DP 1.2 and AVRCP 1.3. You'll be able to
wirelessly stream stored music and music apps from your Bluetooth-enabled Apple
device, Android smartphone/tablet, portable audio player, laptop, or PC to the
H/K receiver. You will also be able to control basic playback functions
(Play/Pause, Fast Forward/Rewind, Previous/Next Track) using the receiver's
remote control. Advanced music operation will still need to be handled from your
Bluetooth-enable device. There is no song/artist information display on the
receiver's front-panel display. Continue to use your Bluetooth device's screen
to view song/artist info.
Note: Due to the differences in Bluetooth technology, some
Bluetooth enabled devices may be incompatible, function improperly, or may
not support all features when used with the H/K receiver.
Remote Control: The HK3770 comes with an IR remote control for
wireless operation of the receiver and your connected USB or iPod device.
H/K Remote App: Downloading the free Harman/Kardon Remote app from the
iTunes App store onto your Apple iOS (5.0+) device or from the
Google Play Store onto your Android (2.2+) device lets you control the
HK3770 receiver from your smartphone or tablet device. You'll also be able to
control your Apple iOS or Android device's stored music from the Harman/Kardon
- Source Selection: You'll be able to access and select
all of the receiver source inputs (Analog 1-5 inputs, Phono input,
vTuner, Bluetooth, USB, or iPod) through your Apple iOS or Android device with the
Harmon/Kardon Remote app installed.
- Audio Settings: You have control of the receiver 's
Volume and other audio adjustments through the Harman/Kardon Remote app and
your Apple iOS/Android device.
- Music Control: You can control all the music you have
stored on your compatible Apple iOS/Android device through the Harman/Kardon
Remote app. You'll be able to search your music by Song, Artist, Album,
Playlist, and Genre. You also get basic playback functions such as
Play/Pause, Previous/Next Track, Fast Forward/Rewind, and Repeat/Random. To
access music apps, you'll need to exit the Harman/Kardon Remote app and
select your desired music app on your iOS or Android device.
IR Input/Output: There is one minijack (3.5mm) remote input and one
minijack (3.5mm) remote output on the rear panel of this unit. If the receiver
is placed behind a solid or smoked glass door, the obstruction may prevent the
front panel IR sensor from receiving commands from the remote. If the unit is
positioned so the front panel IR sensor cannot receive commands from the remote,
an optional IR repeater system (sold separately) may be connected to the Remote
IR In jack and positioned to accept commands from the remote. The Remote IR Out
jack can be connected to the remote input jack of compatible equipment to relay
commands to that equipment.
Trigger Output: This minijack (3.5mm) output sends a 12-volt DC
turn-on signal to another component that accepts a 12-volt trigger, such as a CD
player or powered subwoofer.