The hk680i, with 60 watts per channel, is the first Harman Kardon receiver ever with the advanced technology of digital quartz-locked tuning. That means the tuner section automatically locks into the exact dead center of the broadcast signal every time. And stays there drift-free.
The 680i also features a memory system that allows you to store up to 6 AM and 6 FM stations, and recall them at the touch of a button. And tuning couldn't be easier. You can tune up or down manually by pressing one of the tuning buttons, or you can let the receiver scan automatically for you.
Each time the scanner reaches a station, it will stop and allow the station to play for several seconds. It will continue scanning and playing until you find the station you want and defeat the scanning system.
In addition, the 680i gives you other convenience features. Like tape copy and tape monitoring capabilities for two decks. Tone defeat. Subsonic and high filters. Muting defeat and more.
The hk680i. It brings the accuracy of digital technology to an affordable receiver.
Specifications
Amplifier Section
RMS Power Into 8 Ω (20 -20,000 Hz) : 60 watts at less than 0,02% T.H.D.
Frequency Response: below 1 Hz - 150 kHz (-3 dB) at rated output
Intermodulation Distortion: 0,04% at rated output
TIM Distortion: 0,009% at rated output
Slew Rate/Power Amplifier: 65 volts/µsec
Overall Negative Feedback: 25 dB
Hum and Noise "A" WTD:
Phono : -88 dB
Aux, Residual: -100 dB,
Phono Overload: better than 225 mV
Tuner Section
FM Sensitivity
Mono 300 Ω : 1,8 µV (10,3 dBf)
50 dB Quieting Sensitivity
Mono 300 Ω : 3,0 µV (14,8 dBf)
Stereo 300 Ω : 35 µV (36,1 dBf)
FN Noise: -75 dB
Capture Ratio: 1,2 dB
Alternate Channel Selectivity: -80 dB
Stereo Separation (1 kHz): 55 dB
FM Frequency Response at Detector Output: DC -100 kHz (-3 dB)
AM Sensitivity: 300 µV/m
Dimensions (W x H x D): 443 x 122 x 390 mm
Weight: 12 kg
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