Harman Kardon HK 3770 (c. 2014–2015)

The Harman Kardon HK 3770 is a 2-channel stereo network receiver. It was announced as part of Harman Kardon's 2014 stereo receiver lineup alongside the HK 3700, and it pairs the company's analog heritage with digital streaming.

At its core, the HK 3770 delivers 120 watts per channel into 8 ohms (20Hz–20kHz, <0.07% THD), which the manufacturer's marketing summarized as a "240-watt stereo receiver." The amplifier section is complemented by a high-resolution DAC with 24-bit/192kHz sampling, and the receiver includes both a moving-magnet phono input for vinyl and a built-in AM/FM tuner. The front panel carries a USB input with "iOS Direct" support, allowing direct connection of Apple devices.

Connectivity is where the HK 3770 goes past a conventional stereo receiver. It has Bluetooth for streaming from virtually any tablet, smartphone, or laptop, plus wired Ethernet, DLNA 1.5, and vTuner internet radio access. Harman Kardon's Remote app controls it from iOS and Android devices, and the receiver supports multi-room capability. The company also applied its GreenEdge technology, claiming environmentally friendly design with dramatic energy savings. Standby consumption is rated at under 0.5W.

The receiver measures 17-5/16 inches wide by 4-3/4 inches high by 11-13/16 inches deep, and weighs approximately 6 kg (13.2 lbs). The signal-to-noise ratio is rated at 100dB (IHF-A), and input sensitivity is 250mV/27k ohms. Frequency response runs 10Hz to 130kHz (+0dB/-3dB) at 1W.

Crutchfield carried the HK 3770 and accumulated 146 customer reviews before listing it as no longer available. The retail record is thin otherwise. No original price has surfaced, and period press reviews appear not to have been indexed. A firmware update, version V000.17, was released in July 2014. Used units have appeared on European and Russian markets, with one Dutch auction reaching €150 and a Russian listing at 33,000 rubles. A forum opinion on Stereo.ru suggested that, after listening, some users preferred the separate HK 970 or HK 980 amplifiers for cleaner, more powerful sound. That reflects a single enthusiast's view, not a measured comparison.

Production years and original pricing remain undocumented. The brand invented the stereo receiver category in 1953.

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Harman Kardon HK 3770 (c. 2014–2015)

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