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Harman Kardon HK 3700

Stereo receiver with networking

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    Back

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    Front-panel display

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    Front-panel USB port

 

Our take on the Harman Kardon HK 3700

by David Brown
Harman Kardon

The sound solution for the less-is-more movement

On one hand, you want something that sounds much better than an iPod® or Bluetooth® speaker. On the other hand, you want something less complex than a surround sound system. You'll find your sweet spot in a stereo receiver. In addition to being easy to set up and use, many now offer Internet radio and other network music options. Add your music source and two speakers, and you're ready to relax and enjoy your tunes. You might even connect your TV for improved sound with movies and shows.

Old school sound meets new school features

Harman Kardon receivers are known for combining a stylish design with sound that packs a punch. That's just what you'll get with their HK 3700, along with some pretty cool features for enjoying digital music. With connections for an iPhone®, USB thumb drive, CD player, and turntable, along with network connectivity, there are lots of ways to enjoy all your music with this versatile receiver. It's a great option for music lovers seeking a stereo system with classic sound and modern connectivity.

Clean sound from a new "green" technology

Harman Kardon has been working to make their receivers more energy efficient without compromising sound quality. The HK 3700 represents the fruits of their labor. It utilizes Harman Kardon's GreenEdge™ technology. Rather than redesigning the Class A/B amplification stage, this receiver features a new digital power supply. Unlike conventional analog power supplies, this new digital design uses less energy, fewer raw materials, and produces less heat. The result is a lightweight, efficient, eco-friendly receiver that delivers the same sonic benefits we've come to expect from this audio innovator.

Stream music over your home network

The HK 3700 is Internet-ready — connect it to your network router to open up lots of wireless listening possibilities. Stream music from your computer over your wireless home network. You can also listen to thousands of free Internet radio streams from stations around the world, going far beyond the reach of the built-in AM/FM tuner. Download the free Harman Kardon remote app to your iOS® or Android™ device and use it to control the receiver and play locally-stored songs wirelessly through your system. App control requires a wireless home network and a wired connection between your receiver and your network router.

Connect your iPhone or USB thumb drive

The USB port on the HK 3700's front panel lets you plug in your iPhone, iPod®, or iPad® to listen to music. This connection bypasses the device's digital-to-analog converters in favor of the receiver's high-performance DACs. That means you'll get smoother sound with more detail than your iPhone can deliver on its own. You can also use the receiver's remote to control playback with connected Apple® devices. The USB port is also great for playing digital music files on thumb drives by popping them into the USB port.

See more info on this item

Highlights:

  • 85 watts x 2 (stereo) into 8 ohms (20-20,000 Hz) at 0.07% THD
  • GreenEdge technology combines an energy-efficient, lightweight digital power supply with standard Class AB amplification
  • Internet-ready for listening to music from a networked PC
    • stream music from a DLNA-compatible PC or network-attached storage (NAS) device
    • built-in support for listening to free Internet radio station streams with vTuner
  • 24-bit 192kHz digital-to-analog converters
  • free Harman Kardon Remote app lets you use your Apple or Android device as a Wi-Fi® remote
  • front-panel USB port for connecting an iPhone, iPad, iPod, or thumb drive (WAV, MP3, WMA)
  • 6 pairs of RCA stereo inputs, including phono input (MM)
  • preamp output for a powered subwoofer
  • stereo RCA outputs for recording
  • A/B speaker switching
  • binding post connectors for two pairs of speakers
  • 1/4" headphone jack
  • Ethernet port for network connection
  • AM/FM tuner
  • remote control
  • 17-3/8"W x 5-1/4"H x 12-15/16"D
  • weight: 13.2 lbs.
  • warranty: 2 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Stereo RMS Power (watts)
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85
THD in Stereo
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0.07 %
Frequency Bandwidth (stereo)
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20-20,000 Hz
FM Sensitivity
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13.2 dBf
Signal To Noise Ratio
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100dB
Phono Signal to Noise Ratio
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---
iPod Controls
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---
iPod DAC Bypass
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---
AirPlay Compatible
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No
Internet Ready
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Yes
Wired or Wireless Network
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Wired
DLNA Certified
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Audio
HD Radio Tuner
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No
Satellite Radio Ready
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No
Multi-Room
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No
Total Number of Zones
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1
Audio Dubbing
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Yes
Multibrand Remote Control
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No
Learning Remote
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No
On-Screen Display
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No
Width (inches)
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17-3/8
Height (inches)
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5-1/4
Depth (inches)
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12-15/16
Weight (pounds)
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13.2
Parts Warranty
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2 Years
Labor Warranty
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2 Years
Inputs & Outputs
Headphone Output
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1/4"
USB Connections
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Yes
Phono Input
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1
Video Inputs
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None
Total Audio Inputs
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6
Digital Audio Inputs
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None
Preamp Outputs
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1
Speaker Output Pairs
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2
Product Research
What's in the box?

Download owner's manual

  • Stereo receiver
  • 6' AC power cord
  • Remote control
  • 2 "AAA" batteries
  • FM antenna
  • AM antenna
  • Quick Start Guide
  • Important Safety Instructions

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Audio Section
Network & Tuner Functions
USB/iPod Integration
Remote Control

Audio Section

Output Power: The Harman/Kardon HK3700 stereo receiver features a 85 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 natural sounding.

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.

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 automatically muted.

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 HK3700 is DLNA (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 display.

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.

USB/iPod Integration

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 (5V/0.5A).

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 3/28/2014):

Apple Device Generation Tested Version Media Type Control Type Display Type Charge
Audio Video Remote iPod/iPhone Artist/Song Text Track Info
iPad 1 5.1.1 Y N Y Y Y Y Y
2 7.1 Y N Y Y Y Y Y
3 7.1 Y N Y Y Y Y Y
4 7.1 Y N Y Y Y Y Y
mini 7.1 Y N Y Y Y Y Y
iPhone 2G 3.1.3 Y N Y Y Y Y Y
3G 4.2.1 Y N Y Y Y Y Y
3GS 5.1.1 Y N Y Y Y Y Y
4 7.1 Y N Y Y Y Y Y
4S 7.1 Y N Y Y Y Y Y
5 7.1 Y N Y Y Y Y Y
5C 7.1 Y N Y Y Y Y Y
5S 7.1 Y N Y Y Y Y Y
touch 1st 2.2.1 Y N Y Y Y Y Y
2nd 4.2.1 Y N Y Y Y Y Y
3rd 5.1.1 Y N Y Y Y Y Y
4th 6.1.2 Y N Y Y Y Y Y
5th 7.1 Y N Y Y Y Y Y
nano
2nd 1.1.3 Y N Y Y Y Y Y
3rd 1.1.3 Y N Y Y Y Y Y
4th 1.0.4 Y N Y Y Y Y Y
5th 1.0.2 Y N Y Y Y Y Y
6th 1.2 PC Y N Y Y Y Y Y
7th 1.02 PC Y N Y Y Y Y Y
classic 80GB 1.1.2 Y N Y Y Y Y Y
120GB 2.0.1 Y N Y Y Y Y Y
160GB 2.0.4 Y N Y Y Y Y Y
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 available.

Remote Control

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 HK3700 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 Remote app.

  • Source Selection: You'll be able to access and select all of the receiver source inputs (Analog 1-5 inputs, Phono input, DLNA, vTuner, 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.

 
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Harman Kardon HK 3700 Reviews

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4 out of 5

HK 3700, I'm satisfied.

Written By mdale, USA on Tuesday, July 08, 2014
Crutchfield Customer Review (What's this?)
 
Sleek design, plenty of power for my small office, message display is easy to read, remote control is handy.
Pros:
Lots of features, sounds good, has subwoofer pre-out and USB/IPOD input.
Cons:
Lacks L/R balance control. The push buttoms on the unit feel delicate. The remote control is handy but requires practice to readily manipulate.
6 out of 6 people found this helpful
Was this review helpful?    Yes | No
 

1 question already asked

We are very interested in Internet radio. How well has vTuner worked for you ? [ John M Stephens  Apr 13, 2014 ]
2 answers
  • The internet radio works very well, and it sounds great. [ DENNIS   Apr 23, 2014 ]
  • We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Jeff Staff  Apr 15, 2014 ]

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For a more in-depth review and enhanced detailed information on the Harman Kardon HK 3700, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_532HK3700/Harman-Kardon-HK-3700.html ).