Harman Kardon HK3700 Stereo Receiver – 85 WPC, Sub Out - Image 1
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Harman Kardon HK3700 Stereo Receiver – 85 WPC, Sub Out
Harman Kardon HK3700 Stereo Receiver – 85 WPC, Sub Out - Image 2
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Harman Kardon

Harman Kardon HK3700 Stereo Receiver – 85 WPC, Sub Out

$345.00

Eighty-five watts a channel into 8 ohms with a moving magnet phono stage, a subwoofer pre-out, and A and B speaker posts. Ethernet gives it DLNA and vTuner internet radio and the USB port takes iOS devices through its own 24-bit/192kHz DAC — network streaming on a receiver that still wants a turntable. Tested and working, HK remote included.

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Description

Harman Kardon HK3700 Stereo Receiver – Network Audio, USB for iOS, Phono, Sub Out

Enhance your listening experience with the Harman Kardon HK3700—a powerful, modern stereo receiver engineered for music lovers who appreciate both rich analog sound and the convenience of network streaming. This HK3700 has been thoroughly tested and works perfectly, complete with a Harman Kardon remote for convenient control.

Rated at 85 watts per channel into 8 ohms, the HK3700 delivers dynamic, accurate sound with substantial power and headroom for virtually any speaker system. Signature Harman Kardon high-current capability, a robust power supply, and discrete output devices offer tight, controlled bass and energetic performance.

Connect classic analog sources via multiple RCA line inputs and a high-quality moving magnet phono stage—perfect for turntables. The HK3700 also offers direct USB connectivity for streaming music from Apple iOS devices (using its internal 24-bit/192kHz DAC), plus an Ethernet port for streaming internet radio (vTuner) and local audio files over your home network via DLNA. Built-in FM/AM tuner is included for favorite radio broadcasts.

A dedicated subwoofer pre-out, full-size speaker posts, headphone output, and a clean high-contrast front-panel display round out its thoughtfully designed feature set.

Specifications:

  • Power Output: 85W/ch (8Ω, 20Hz–20kHz, <0.07% THD) Class AB
  • Frequency Response: 10Hz–130kHz
  • Inputs: 5 x RCA line, 1 x phono (MM), Ethernet (DLNA/vTuner), USB (for iOS only), AM/FM antenna
  • Outputs: Speaker A/B binding posts, subwoofer pre-out, headphone out
  • Networking: Wired Ethernet (DLNA 1.5, vTuner internet radio)
  • DAC: Built-in, 24-bit/192kHz for iOS/USB playback
  • Remote: Harman Kardon remote included
  • Display: High-contrast LCD
  • Dimensions: 17.3″ x 4.75″ x 11.81″ (440 x 121 x 300mm)
  • Weight: 13.2 lbs (6kg)

This Harman Kardon HK3700 offers robust power, versatile analog connectivity, and home network audio streaming—all with the classic reliability and sound signature the brand is known for.

Includes HK remote and a soft copy of the manual in PDF. Buy with confidence and benefit from Radique’s Bumper-to-Bumper Warranty and Perpetual Trade-Back Program.

$345.00
Views: 279
Additional information
Weight18 lbs
Dimensions16.1 × 21.3 × 9.1 in
About brand
Harman Kardon at Radique
We service Harman Kardon, too. Bring us your own Harman Kardon receivers, amplifiers, cassette decks and CD players for repair, servicing or restoration (solid-state gear; we don't take in tube equipment), with a 90-day warranty on the work. See our Audio Service page

Harman Kardon began in New York in 1953, founded by Sidney Harman, who was born in Montreal, and Bernard Kardon. Harman Kardon calls its 1954 Festival D1000 the first hi-fi receiver. We carry Harman Kardon stereo receivers, AV receivers, integrated amplifiers, cassette decks and CD players. We've had more than 130 Harman Kardon listings so far. Every used Harman Kardon here is inspected, tested and serviced as required, then photographed in-house and covered by our Bumper-to-Bumper Warranty and Perpetual Trade-Back Program. Every AV receiver we list is tested input by input on our bench: each HDMI input and output, the analog, optical and coaxial inputs, the subwoofer outputs and the wireless features where it has them. Don't see the model you want? Tell us on First Dibs and we'll email you when one arrives.

The Harman Kardon story, 1953 to today

Sidney Harman and Bernard Kardon left the David Bogen Company, where Kardon was chief engineer, and founded Harman Kardon in New York in 1953. Harman was born in Montreal in 1918 and grew up in New York. Kardon retired in the 1950s.

Receivers first. Harman Kardon calls the Festival D1000 of 1954 the first hi-fi receiver and the Festival TA230 of 1958 the first stereo receiver. The Citation II tube power amplifier of 1959, designed by Stu Hegeman, sold as a kit or ready-built.

Cassette and the 1970s. Harman Kardon says its CAD-5 of 1970 was the first hi-fi cassette recorder with Dolby noise reduction. Its "Twin Powered" receivers of the 1970s, such as the 430 and 730, gave each channel its own power supply.

Owners. Sidney Harman sold the company to Beatrice Foods in the late 1970s, when he became US Deputy Secretary of Commerce. He formed Harman International in 1980 and bought Harman Kardon back in 1985. Samsung bought HARMAN in 2017, and Harman Kardon remains one of its brands.

Which Harman Kardon is which?

Tube era (1950s and 1960s): Festival receivers, and Citation kits and factory-built units such as the Citation I preamplifier and II amplifier.

1970s receivers: the 330 series, the Twin Powered 630, 930, 430 and 730, and the HK670.

1980s receivers: the "i" models such as the hk690i, advertised for its high current capability, and the 330i.

Citation separates: solid-state Citation amplifiers and preamplifiers from 1970 to the 1990s, including the Citation XX of the early 1980s.

Cassette decks: from the CAD-4 and CAD-5 to the 1980s decks numbered CD91 to CD491. Those "CD" models are cassette decks, not CD players; Harman Kardon CD players carry "HD" names.

AV receivers (late 1990s on) and later stereo: the AVR line, such as the AVR 3600, and stereo models such as the HK 3700 and HK 990.

Buying used Harman Kardon: what to check

Dial and meter lamps. Owners report dead or flickering lamps on 1970s receivers such as the 930, 430 and 330C; many are replaced with LEDs.

Capacitors. Expect a 1970s receiver that hasn't been recapped to need it.

Output stage. Owners report blown output transistors on the 730 and 430, often caused by a failed part nearby. Both channels should play cleanly at a realistic level.

Switches. Owners say the 1980s "i" receivers are prone to dirty switches that make channels cut out. Try every input and the balance control.

AV receivers. HDMI is usually the first thing to fail on a modern AV receiver. We test every HDMI input and output before listing.

Everything we list is inspected, tested and serviced as required here, and comes with our warranty.

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