Harman/Kardon hk690i receiver

The hk690i - it's the ultimate receiver from Harman/Kardon.

The hk690i provides the combination of pure power, sonic excellence and features that the true audiophile demands.

With its High instantaneous Current Capability of 45 amps, the hk690i will develop far more power under peak demand conditions than its rated 60 Watts per channel. In fact, its dynamic behavior approaches the ideal; the transient power nearly doubles into 4 ohms and continues to increase dramatically into 2 ohms. This means that the hk690i gives you louder, clearer sound than any other 60 Watt receiver.

It has an Ultrawideband Frequency Response of 0,2 Hz to 150 kHz, as well as low negative feedback for extremely fast and accurate transient response. The result is a virtual elimination of TIM distortion.

The phono section has a unique RIAA equalization circuitry  which maintains a constant low level of negative feedback throughout the audio frequency range. The tuner section automatically shuts off when the phono or aux buttons pressed to eliminate digital switching noise or the possibility of bleed-through.

The digital synthesized quartz-locked hk690i possesses a unique sample-and-hold MPX decoder to decrease high frequency switching noise while eliminating the need for much of the filtering normally required in FM processing.

Features normally expected to be found in top-of-the-line components are, naturally, included. Provisions for two tape decks (with tape copy capability) auto and manual tuning, 8 Am and 8 FM memory presets, switchable bass and treble turnover frequencies, a Moving Coil head amplifier, loudness control, subsonic and high cut filters, muting control and FM high blend.

 

Specifications

Amplifier Section

Power Output

RMS, per channel, (both channels driven into 8 Ω , 20-20,000 Hz):  60 Watts less than 0,06% T.H.D.

IHF Signal (Dynamic Power) at 4 Ω , 1 kHz :  120 watts

IHF Signa (Dynamic Power) at 2 Ω , 1 kHz :  150 watts

Negative Feedback (Overall):  12 dB

High Instantaneous Current Capability (HCC):  45 Amps

Power Bandwidth (at half-rated Output, 8 Ω ):  less than 10 Hz - 100 kHz

Frequency Response (at 1 Watt Output, +0 -3 dB):  0,2 Hz - 150 kHz

TIM:  Immeasurable

Slew Rate:  200 V/µsec

Square Wave Rise Time:  1,8 µsec

Square Wave Tilt, at 20 Hz :  less than 5%

Signal-to-Noise Ratio (IHF A Weighted, ref. 1 Watt output (New IHF)

Phono MC :  78 dB; 500 µV input

Phono MM :  80 dB; 5 mV input

Aux :  80 dB; 0,5 V input

Input Sensitivity/Impedance

Phono MC :  120 µV /47 k Ω 

Phono MM :  2,2 mV/47 k Ω , 125 pF

Aux :  135 mV/22 k Ω

Overload at 1 kHz :  200 mV/Infinite

RIAA Equalization (20 Hz - 20 kHz): ±3 dB

Tone Controls

Bass :  ±10 dB at 50 Hz

Treble :  ±10 dB at 100 kHz

Subsonic Filter:  15 Hz, 12 dB/oct

Tuner Section

Usable FM Sensitivity (dBf/µV - 75 Ω)

Mono:  10,8 dBf / 0,95 µV

50 dB Quieting Sensitivity (dBf/µV - 75 Ω)

Stereo:  14,6 dBf / 1,65 µV

FM Signal-to-Noise Ratio

Stereo:  76 dB

Capture Ratio:  1,0 dB

Alternate Channel Selectivity:  70 dB

iF Rejection:  110 dB

AM Rejection (45 dBf):  60 dB

Stereo Separation (1 kHz, 65 dBf, 100% mod.):  55 dB

FM T.H.D. (1 kHz, 100% mod.)

Mono :  0,06%

Stereo :  0,08%

Am Sensitivity:  15 µV (ext. Ant.)

AM Alternate Channel Selectivity:  45 dB

AM Image Rejection:  33 dB

AM IF Rejection:  60 dB

Dimensions (W x H x D):  440 x 134 x 368 mm (17-3/8" x 5-1/8" x 14-1/2")

Weight:  10 kg (21 lbs 19 oz)