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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





Harman/Kardon hk590i receiver

Harman/Kardon's state-of-the-mind technology is expertly exemplified in the hk590i receiver

The hk590i offers a full 45 watts per channel, with 35 amps of High instantaneous Current Capability (HCC) available under peak demand conditions. With the transient power nearly doubling into 4 Ω  and continuing to increase dramatically into 2 Ω , the dynamic behavior approaches the ideal.

The Ultrawideband Frequency Response of the hk590i of 0,2 Hz to 150 kHz in the amplifier section works along with the phono section's dual RIAA circuitry to provide the most open, transparent sound.

The tuner section shuts down when the phono or aux buttons are pressed to eliminate the possibility of digital switching noise or bleed-through. Switchable bass and treble turnover frequencies allow for custom-tailoring of the tone-control characteristics to the listening environment. In addition, the hk590i has tone defeat and 2-way tape capability.

The digital synthesized quartz-locked tuning section of the hk590i can be tuned up or down manually or will scan automatically to the next station. For added convenience, stations may  be locked into one of the 8 AM and 8 FM memory presets.

 

 


Specifications

Amplifier Section

Power Output

RMS, per channel, (both channels driven into 8 Ω , 20-20,000 Hz):  45 Watts less than 0,08% T.H.D.

IHF Signal (Dynamic Power) at 4 Ω , 1 kHz :  95 watts

IHF Signa (Dynamic Power) at 2 Ω , 1 kHz :  120 watts

Negative Feedback (Overall):  12 dB

High Instantaneous Current Capability (HCC):  35 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:  120 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 :  80 dB; 5 mV input

Aux :  80 dB; 0,5 V input

Input Sensitivity/Impedance

Phono :  2,2 mV/47 k Ω , 125 pF

Aux :  135 mV/22 k Ω

Overload at 1 kHz :  170 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:  15,6 dBf / 1,65 µV

FM Signal-to-Noise Ratio

Stereo:  75 dB

Capture Ratio:  1,0 dB

Alternate Channel Selectivity:  70 dB

iF Rejection:  80 dB

AM Rejection (45 dBf):  52 dB

Stereo Separation (1 kHz, 65 dBf, 100% mod.):  50 dB

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

Mono :  0,08%

Stereo :  0,12%

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:  8 kg (17 lbs 10 oz)


 

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