HK 770

HK 770

Stereo Power Amplifier (65 watts x 2)

Sold from 1981 until 1982

Predecessor Product: CITATION 12 (TWELVE)
Successor Product: PA 2100

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Product Specifications

Amplifier Power (RMS)
65 watts,/ch into 8 ohms both channels driven simult. From 20 – 20kHz < 0.03% THD
Power Bandwidth
< 8Hz – 100kHz @ 32.5 watts/ch < 0.03% THD
Total Harmonic Distortion
0.006% @ rated output
Transient Intermodulation Distortion (TIM)
< 0.01% @ rated output both channels driven @ different operating frequencies
Frequency Response
below 1Hz to beyond 250kHz (+0/-3dB)
Damping Factor
> 50
Slew Rate
150V/ usec into 8 ohms@rated power output, both ch driven
Rise Time
SQUARE WAVE – 1.5 usec into 8 ohms@rated power output, both ch driven
Square Wave Tilt
< 2% @ 20Hz
Transient Intermodulation Distortion (TIM)
< 0.007% @ rated output
Crosstalk
> 100dB (20Hz – 20kHz) unused channel shorted input
Signal-to-Noise Ratio
123dB (IHF-A)
Input Impedance
35k ohms
Input Sensitivity
1.2 volts for rated output
MSRP U.S.
$419.95 each
Dimensions (H x W x D)
2.9 x 15.2 x 12.6

Stereo Power Amplifier (65 watts x 2)

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