HK 1680

Usable Sensitivity

FM... MONO – 1.8uV

Quieting Sensitivity

FM... MONO – 3.0uV

Quieting Sensitivity

FM... STEREO – 35uV

Signal-to-Noise Ratio

FM... STEREO – -75dB

Capture Ratio

FM... 1.0dB

Alternate Channel Selectivity

FM... 75dB

IF Rejection

FM... 100dB

AM Rejection

FM... 65dB

Stereo Separation

FM... 48dB @ 1kHz

Total Harmonic Distortion

FM... MONO – 0.09% 1kHz, 100% modulation

Total Harmonic Distortion

FM... STEREO – 0.1% 1kHz, 100% modulation

Sensitivity

AM... 300uV/m

Alternate Channel Selectivity

AM... 50dB

Image Rejection

AM... 40dB

IF Rejection

AM... 25dB

Slew Rate

70 volts/uSec

Amplifier Power (RMS)

60 watts @ <0.02% THD primarily low order harmonics @ 8 ohms from 20Hz – 20kHz

Rise Time

SQUARE WAVE – better than 1.8uSec @ 20kHz

Power Bandwidth

HALF POWER – <10Hz – 100kHz with 8 ohms

Square Wave Tilt

<3% @ 20Hz

Frequency Response

<1Hz – 150kHz (+0/–3dB @ rated output)

Negative Feedback

25dB

Total Harmonic Distortion

0.01% primarily low order harmonics 1kHz @ rated output

Damping Factor

>60 @ 8 ohms, 20Hz – 20kHz

Transient Intermodulation Distortion (TIM)

0.08% @ rated output

Hum and Noise

PHONO – -88dB A-WTD

High Instantaneous Current Capability (HCC)

± 30 Amps

Hum and Noise

AUX – -100dB A-WTD

Input Sensitivity

PHONO – 2.2mV AUX -130mV

Phono Input Sensitivity

RESISTANCE – 47k ohms

Phono Input Sensitivity

CAPACITANCE – 135pF

Phono Overload

>230mV

RIAA Equalization

±0.5dB