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-6200 Receiver


FM/AM Stereo Receiver - a new masterpiece of stereo efficiency to carry on the Kenwood tradition of quality.

Kenwood unveils a deluxe new stereo receiver; the KR-6200 with sophisticated new circuitry for wide band response, low distortion, new NPN and PnP transistors for low-noise performance; new dual-protection circuit to prevent damage from power overload, excellent FM reception with exceptional sensitivity, selectivity and capture ratio, and a host of convenience features, including 2-system tape monitor, special midrange tone control, and linear FM dial scale

KR-6200 Features:
Frequency Linear Variable Capacitor - The dial scale has linear graduations (arranged at the same intervals) to make tuning easier
Front-end with 2 FET Circuits - The front-end contains FET circuits together with one dual gate element. These circuits assure high sensitivity, worthy of the name Kenwood.
1 IC and 3 Element mechanical Filter - The 3 element mechanical filter is employed in the IF stage. It improves the characteristics of capture ratio and selectivity
Independent AM and FM circuits for the IF Stage - The FM circuit for the IF stage is separated from the AM circuit. Such a scheme is effective in the reduction of mutual interference

Newly Developed DSD Circuit and MPX Circuit
The double switching system and the carrier leak block filter have been adopted. They are a great aid in improving the de-emphasis frequency characteristic and especially improvement of stereo separation.
Large Meters with Built-in Lighting mechanisms - The KR-6200 has two large-scale meters for tuning convenience
Protected Semi-Complementary Direct-Coupled Power Amplifier - The power amplifier is a protected semi-complementary direct coupled type which assures stabilized high performance
Equalizer Circuit with PNP can Type Transistor - This circuit  employs a PNP can type transistor for the improvement of s/n ratio and circuit reliability.

Specifications
Amplifier Section
Dynamic Power Output (IHF):
240 watts both channel  at 4 Ω 91 kHz)
190 watts both channel  at 8 Ω (1 kHz)
Continuous Power Output:
80/80 watts each channel at 4 Ω (1 kHz)
60/60 watts each channel at 8 Ω (1 kHz)
60/60 watts both channel at 4 Ω (1 kHz)
50/50 watts both channel at 8 Ω (1 kHz)
45/45 watts both channel at 8 Ω from 20 - 20,000 Hz
Total Harmonic Distortion (at rated): 0,5%
Total Harmonic Distortion (at -3 dB rated):  0,1%
Intermodulation Distortion (at rated):  0,5%
Intermodulation Distortion (at -3 dB rated):  0,2%
Frequency response:
High Level Input :  20 - 40, 000 Hz ±2 dB
Power Bandwidth (IHF):  13 - 30,000 Hz
Input Sensitivty/Impedance:
Phono:  2,5 mV/ 50 k Ω
Mic :  3 mV/ 50 k Ω
Aux 1 and 2 :  180 mV/50 k Ω
Tape Play A and B :  180 mV/ 50 k Ω
Recording Output:
Tape Rec A and B :  180 mV
DIN :  36 mV
Damping Factor (at 8 Ω):  50
Huma nad Noise:
Phono :  65 dB
Mic :  55 dB
Aux 1 and 2 :  75 dB
Tape Play 1 and 2 :  75 dB
Speaker Impedance:  4 - 16 Ω
Tone Control:
Bass :  ±12 dB at 100 Hz
Mid :  ±8 dB at 1 kHz
Treble :  ±12 dB at 10 kHz
Filter
Low :  -7 dB at 100 Hz
High :  -10 dB at 10 kHz
Loudness Control 9-30 dB):  +10 dB at 100 Hz;  +5 dB at 10 kHz
FM Tuner Section
Antenna Impedance:  300 Ω, 75  Ω
Usable Sensitivity (IHF):  1,7 µV
Harmonic Distortion (at 400 Hz, 100% mod.):
Mono :  0,5%
Stereo :  0,6%
Signal-to-Noise Ratio:  66 dB
Capture Ratio:  1,5 dB
Selectivity (IHF):  65 dB
Image rejection:  80 dB
IF Rejection:  100 dB
Spurious Signal Rejection: 100 dB
AM Suppression:  70 dB
Stereo Separation:  40 dB at 1 kHz;  25 dB at 10 kHz
Sub Carrier Suppression:  60 dB
Muting level:  10 µV
Quieting Slope:  52 dB at 5 µV;  59 dB at 10 µV;  66 dB at 50 µV
Frequency Response:  20 - 15,000 Hz  +0,5 dB, -2 dB
Front End:  2 FETs (1 DG), 4 Gang
IF Stage:  1 IC, 3 element mechanical filters
AM Tuner Section
Antenna:  Built-in ferrite bar antenna and external antenna terminal
Usable Sensitivity (IHF):  15 µV
Signal-to-Noise Ratio:  45 dB
Selectivity (IHF):  35 dB
Image Rejection:  70 dB
IF rejection:  70 dB
Front End:  3 Gang
IF Stage:  2 stages
General
Semiconductors:  2 FETs,  1 ICs,  54 Transistors,  45 Diodes
Power Requirement:  110, 120, 220, 240 V 50/60 Hz
Power Consumption:  320 at full power
Dimensions (W x H x D):  17-1/8" x 5-3/4" x 14"
Weight:  29 lbs
Included:  Walnut cabinet

B&O Beomaster 1900

 The Beomaster 1900 Receiver
The dramatic center of the Beosystem 1900 is the Beomaster 1900 receiver. Its operation borders on magical, its performance is without audible flaw,,its aesthetics are beyond reproach. It is a component which has truly domesticated high fidelity.
All major functions of the 1900 receiver are controlled by touch-sensitive electronic switches: the sculpted depressions aligned along the top panel. They are volume, input selection, selection of up to five user pre-set FM stations, and standby. These controls function electronically, completely eliminating mechanical linkages which can wear out or become misaligned (estimated to cause approximately 80% of service problems).
 When any of the electronic controls are touched, a lighted indicator immediately appears directly above. You always know the operational status of the 1900, even from across the room.
 The 1900 also allows you to pre-set up to five FM stations for instant, electronically accurate recall. Four separate tuning indicators and the main random tuning dial are located under the aluminum lid. By tuning the four indicators to those stations you listen to most frequently, they may be recalled by simply touching their respective control on the front panel. The main tuning dial can also be set at a preferred station and this station immediately recalled by a control on the front panel. Random tuning is accomplished by a flush-set tuning control moved effortlessly by a single finger. Also, positioned under the aluminum cover is the AFC which, when in effect, eliminates drift from the stations you select.
Also found under the aluminum lid are the controls for adjusting bass, treble, and balance between your speakers. These controls are smooth sliding potentiometers. Easily viewed, illuminated indicators are used to show visually the extent to which the controls have been moved from their neutral position.
 The Beomaster 1900 receiver has a split power supply which provides optimum performance throughout the frequency range. All output transistors are usd conservatively and an electronic protection circuit automatically respondes to any overload, breaking the circuit and preventing any damage from occuring to receiver or speakers. The tuner section of the 1900 utilizes FETs for high sensitivity and selectivity,PLL circuitry is used to guarantee excellent channel separation and greater long term circuit stability. Ceramic filters and integrated circuits in the IF amplifier and stereo decoder provide excellent separation and low harmonic distortion.

Specifications
Amplifier Section
Power Output (1000 Hz RMS):  2 x 30 W at 4 Ω; 2 x 20 W at 8 Ω
Music Power :  2 x 50 W at 4 Ω ; 2 x 30 W at 8 Ω
Speaker Impedance:  4 Ω
Harmonic Distortion:
1000 Hz, 50  mW :  less than 0,07%
DIN 45 500, 40 - 12,500 Hz :  less than 0,13%
Intermodulation DIN 45 500 :  less than 0,15%
Frequency Range (±1,5 dB DIN 45 500):  20 - 40,000 Hz
Power Bandwidth (1% distortion):  10 - 40,000 Hz
Damping Factor (1000 Hz):  better than 70
Input Sensitivity/Impedance:
Pick-up:  3 mV/47 k Ω
Tape:  220 mV/ 470 k Ω
Signal-to-Noise Ratio (DIN 45 500):
Pick-up (50 mW) :  better than 60 dB
Tape recorder (50 mW):  better than 65 dB
Channel Separation
1000 Hz (DIN 45 500):  better than 56 dB
250 - 10,000 Hz :  better than 38 dB
Output Level:
Tape Recorder (1000 Hz DIN 45 500):  100 mV/100 k Ω
Headphones :  max, 6 V/200 Ω
Bass Control at 40 Hz :  ±18 dB
Treble Control at 12,500 Hz :  ±15 dB
Tuner Section
FM Range:  87,5 - 108 MHz
Sensitivty [stereo 46 dB]:  less than 30 µV/75 Ω
Signal-to-Noise Ratio  [stereo, weighted]:  better than 60 dB
Frequency Range (DIN 45 500, ±1,5 dB):  20 - 15,000 Hz
Harmonic Distortion (DIN 45 500):  less than 0,4%
Stereo Channel Separation (1000 Hz):  better than 35 dB
Pilot Suppresion
At 19 kHz:  better than 45 dB
At 38 kHz :  better than 50 dB
General Section
Power Supply:  110 - 130 - 220 - 240 V; 50/60 Hz
Power Consumption:  25 - 185 W
Dimensions (W x H x D):  620 x 60 x 250 mm
Weight:  7,6 kg

Rotel RP 845 Turntable


Following the fabulous and highly acclaimed RP850 and RP830 turntables, Rotel proudly present the newest turntable with the same outstanding ability to deliver sheer musical performance  at a realistic price. A high standard finished wood cabinet supported by a heavy metal bottom chassis, a tonearm stem fixed independently on a thick  center metal plate, a close-tolerance smooth center spindle, specially designed highly effective insulator feet, a super damped Norsorex mat, the heavy aluminum diecast platter, an attractive smoked dust cover with the insulated hinges etc. Plus a high quality, high rigid tonearm with special radial bearings for both horizontal and vertical planes. An end result is the usual Rotel's outrageously musical enjoyment. Naturally, perfectly compatible with all the other Rotel  high performance components.

Specifications:
Motor:  4-pole hysteresis synchronous motor
Drive:  belt-drive system
Speeds:  33-1/3 and 45  pm
Tonearm System:  Static balanced straight pipe arm, direct readout stylus gaude, anti-skate control
Wow and Flutter:  less than 0,04%
Signal-to-Noise Ratio:  70 dB (DIN-B)
Dimensions (W x H x D):  430 x 140 x 360 mm
Weight:  7,4 kg


H.H. Scott PS87A Turntable


PS87A Fully-Automatic Direct-Drive Turntable with Srobe
The Scott PS87A boasts an unmatched combination of the most wanted features. And, at a suprisingly affordable price. Automatic start, reject, return and shut-off plus single play or repeat functions provide the ultimate in convenience.
Featured strobe light with adjustable speed controls (±3%)
Viscous damped arm lifter with cueing lever
Direct readout stylus pressure and anti-skating controls
Record size selector
Spare handshell receptacle 12" finished diecast platter with strobe pattern
Low-capacitance phono cables and hinged dust cover
Unipivot suspension statically-balanced "S" shaped tonearm minimizes tracking error

Specifications:
Type:  Direct-drive full automatic
Motor:  electronically controlled DC motor
Turntable Platter:  12-inch (300 mm), aluminium diecast
Drive System:  Direct drive
Speedas :  33-1/3 and 45 rpm
Pitch Control Range:  ±3%
Wow and Flutter:  0,03%
Signal-to-Noise Ratio:  60 dB
Tonearm: 210 mm, static balanced, adjustable weight and anti-skating
Stylus pressure Range:  1 - 3 grams
Antiskating Range:  0 - 4 grams
Power Requirements:  AC 220V, 50 Hz; AC 120 V, 60 Hz
Power Consumption:  11 watts
Dimensions (W x H x D):  448 x 150 x 354 mm (17-2/3" x 5-3/4" x 13-5/6")
Weight [net]:  7,8 kg (17 lbs)