Harman Kardon HK 680

Repair

USA 1995

Power 2 x 85 W 8 Ohms
Power 2 x 120 W 4 Ohms
Instantaneous current capacity 70 A
10Hz - 80kHz half power frequency response
Frequency response at -3 dB 1 Hz - 200 kHz
Sensitivity of line inputs 140 mV 20 kOhms
Phono MM inputs sensitivity 2.4 mV (max 109 mV) 49 kOhms
Phono MC input sensitivity 0.13 mV (max 5.6 mV) 56 Ohms
Signal to noise ratio of line inputs 74 dB
MM phono input signal noise ratio 79 dB
MC phono input signal noise ratio 75 dB
Stereo phono separation 65 dB
Intermodulation distortion at 1W 0.1%
Bass tone control ± 10 dB at 50 Hz
Treble control ± 10 dB at 10 kHz

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