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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





Kenwood KR-1000

Computerized Hi-Speed DC Receive

Features:
Program Mode Commander memory flowchart display
Multi-functional weekly program clock/audioo timer
7-band digital graphic equalizer and mic mixing
Quartz synthesizer scan tuning, 6 FM/6 AM preset station recall
Digital volume control and bi-directional dubbing
Mic. Mixing
Hi-speed, DC, Zero switching amplifier
120 W/channel RMS, 8 ohms, 20 Hz -20 kHz, o,1% T.H.D.

Specifications
Audio Section
Power Output:  120 wattsper channel, minimum RMS, both channel driven at 8 Ω from 20 Hz to 20,000 Hz with no more than 0,01% Total Harmonic Distortion
Both Channel Driven
Into 8 Ω at 1,000 Hz :  150 W + 150 W
Into 4 Ω at 1,000 Hz :  130 W + 130 W
Dynamic Power Output at 8 Ω :  460 W
Total Harmonic Distortion (20 Hz -20 kHz from tape):
Rated power into 8 Ω :  0,01%
1 watt power  into 8 Ω :  0,005%
Intermodulation Distortion (60 Hz :7 kHz = 4:1 SMPTE)
Rated power into 8 Ω :  0,005%
Slew Rate :  ±150 V/µsec
Rise Time :  1,2 µsec
Damping Factor (at 1 kHz into 8 Ω):  75
Input Sensitivity/Impedance:
Phono :  2,5 mV/50 k Ω
Tape, AUX :  150 mV/50 k hm
MIC :  2,5 mV/50 k Ω
Signal-to-Noise Ratio (A weighted):
Phono :  82 dB for 2,5 mV input;  88 dB for 5,0 mV input
Tape, AUX :  105 dB for 150 mV input
MIC :  72 dB for 2,5 mV input
Maximum Phono Input Levelat 1,000 Hz :  150 mV(RMS, T.H.D. 0,03%)
Frequenct response:
Phono RIAA Standard Curve:  20 Hz to 20 kHz ±0,3db
Tape, AUX :  3 Hz to 270,00 Hz _3 dB
Tone Control: 7-Band graphic Equalizer
60 Hz, 160 Hz, 400 Hz, 1 kHz, 2,5 kHz, 6 kHz, 15 kHz :  ±10 dB at each frequency
Loudness Contour (vol _30 dB):  +10 dB at 100 Hz
Low Filter :  18 Hz at 6 dB/oct
High Filter :  5 kHz at 6 dB/oct
Output level/Impedance
Tape Rec Out
PIN :  150 mV/1 k Ω
DIN :  30 mV/80 k Ω
FM Tuner Section
Usable Sensitivity:  10,3 dBf (1,8 µV)
50 dB Quieting Sensitivity
Mono :  16,1 dBf (3,5 µV)
Stereo :  35,6 dBf (35 µV)
Signal-to-Noise Ratio at 65 dBf
Mono :  76 dB
Stereo :  70 dB
Total Harmonic Distortion at 1,000 Hz
Mono :  0,09%
Stereo ;  0,1%
Frequency response:  30 Hz ot 15,000 Hz +0,5 dB -1,0 dB
Capture Ratio:  1,0 dB
Image Rejection ratio:  80 dB (98 MHz)
Spurious Response ratio:  90 sb (98 MHz)
IF Response Ratio:  100 dB (98 MHz)
Alternate Channel Selectivity
Wide ;  30 dB at ±300 kHz
Narrow :  60 dB at ±300 kHz
AM Suppression Ratio:  60 dB
Stereo Separatio Ratio (Wide)
At 1,000 Hz :  50 dB
At 50 Hz to 10,000 Hz :  37 dB
Subcarrier product Ratio:   65 dB
Antenna Impedenca:  300 Ω balanced and 75 unbalanced
FM Frequency Range:  88 MHz to 108 MHz
Am Tuner Section
Usable Sensitivity:  14 µV
Signal-to-Noise Ratio:  50 dB
Image Rejection:  40 dB
Selectivity:  45 dB
General
Power Consumption: 
700 watts at full power
120 watts at no signal
AC Outlets: Switched 2, Unswitched 1
Dimensions (W x H x D):550 x 155 x 443 mm (21-21/32" x 6-3/32" x 17-7/16")
New Weight:  16 kg (35,3 lbs)



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