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

Marantz PM-8 amplifier

Stereo Control Console
Features Preamplifier Section:
Transient Intermodulation Distortion (TIM) design and controll versatility. Like the SM-7 and SC-7, features design parts specifically created to combat transient intermodulation distortion.
Low Noise and Low Distortion phono Equalizer
The Input is a cascade defferential formed of low-nooise FET's, followed by a complete push-pull amp and Darlington-connected SEPP output. The entire phono equalizer circuit in PM-8 is DC for low distortion, low-TIM performance and better transient response.
Pre-preamp for MC cartridges, the built-in pre-amp is DC using low noise Fets at the input. S/N ratio is extremely good thanks to low-impedance negative feedback circuitry.

Features Power Section
Powerful low-TIM performance. Marantz use DC configurationthrought and improved every circuit part for combat Transient Intermodulation Distortion, TIM
Marantz use high speed power transistors created to our specifications and still more important, and improved open-loop response to enable us to use a lower amount of negative feedback thereby reducing the more ordinary forms of distortion.
Low Noise and High Output configuration. The input of the Pm-8 is formed of a differential Dual FET with matched thermal characteristics. Next is a duall FET differential  amp. An emitter/follower buffer and a 3 stage darlington-connected output, ending in a parallel push-pull circuit. This latter circuit is formed of an array of EBTs (Emitter - Ballast - Transistor) with superb performance characteristics, both in high power output and high speed switching.
Separate power Supplies, Left ann Right channels receive power from separate supplies. The predriver and power output sections each have their own transformer. To further assure a constant energy supply a quartet of massive 15,000 µF capacitors are used.

Power Output (rating per channel)
320 W at 4 Ω DIN
270 W at 4 Ω RMS
200 W at 8 Ω DIN
190 W at 8 Ω RMS
Total Harmonic Distortion (RMS, 8 Ω):  0,03%
Intermodulation Distortion:  0,03%
Dampingg Factor:  100
Main In Sensitivity/Impedance:  1,5 V/30  k Ω
Frequency Response:  DC 100 Hz-kHz
Signal-to-Noise Ratio Main In:  125 dB
MM Cartridge Input
Frequency Response (RIAA):  ±0,2 dB
Signal-to-Noise Ratio:  90 dB
Input Impedance:  1/100/27/47 k Ω
Input Capacity:  200 pf
Input Sensitivity:  2 mV
Equivalent Noise at Input:  0,24 µV
Dynamic Range:  125 dB
Moving Coil Cartridge Input
Input Sensitivity/Impedance:  200 µV/ 10/47/100/220 Ω
Aux. Input Sensitivity/Impedance:   150 mV/40 k Ω
Frequency Response:  5 Hz -100 kHz
Signal-to-Noise Ratio:  105 dB
Output Voltage:
Tape Out ;  415 mV
Preamp Out :  1,5 V
Output Impedance
Tape Out :  250 Ω
Preamp Output :  100 Ω
 dimensions (W x H x D):  416 x 146 x 437 mm
Weight:  26 kg
Finish : Walnut Cabinet

Luxman R-351 receiver

Digital Synthesized AM/FM Stereo Receiver
Luxman's audio excellence combines with todays computer intelligence in the new System Bus to bring you the heart of a totally integrated system. The R-351 features a robust 55 watts per channel. Convenience features include full system remote control, computer analuzed tuning, CD Syncro recording, record Out selector and a variable sleep timer. Multi-room system remote control is available with infrared or in-wall keypad operation. As with every "300" Series unit, the System Bus computer control offers the simplest method of operating your system ever. Also Duo beta, STAR Circuit, Voltage Driven Amplification, pre-amp Out.

20 Random Station memories - A total of 20 AM and /or FM stations can be memorized in any random pattern. Any station can be instantly recalled by touching the appropriate random station preset button without any need to change the Am or FM Input Selector, and the 20 stations can be recalled by local or remote control
Computer Store - This feature allows the internal computer of the R-351 to automatically store a series of FM or AM station in the 20 preset memory locations. The automatic storing sequence may be started at the first or any subsequent memory position and from any chosen frequency position on the FM or AM band.

Auto-Seek FM/AM Tuning - Allows automatic tuning of all stations (except weak stations below the muting level) on a station-by-station basis. This eliminates the tedium of manually fine tuning every station.
Amplifier Section
Power Output : 55 W (8 Ω load, 20 -20,000 Hz)
Distortion:  0,08% (8 Ω load, 20 - 20,000 Hz)
Input Sensitivity/impedance:  150 ±30 mV /35 k Ω (ref. 1 kHz)
Frequency response:  10 Hz - 50 kHz (-3 dB, ref. 1 kkhz)
Signal-to-Noise ratio:  82 dB (500 mV input)
Tone Controls:
Bass (at 100 Hz) :  ±10 ±2 dB
Treble (at 10 kHz) :  ±10 ±2 dB
Residual Noise:  2 mV
Crosstalk:  60 dB 9ref. 1 kHz)
Separation:  56 dB (ref. 1 kHz)
Phono Section
Input Sensitivity/Impedance:  2,5 ±0,5 mV/47 k Ω
Frequency Response:  100 Hz - 10 kHz (±1,5 dB, ref. 1 kHz)
Signal-to-Noise Ratio:  74 dB (5 mV Input)
Crosstalk:  60 dB 9ref. 1 kHz)
Separation:  55 dB (ref. 1 kHz)
FM Section
Intermediate Frequency:  10,7 MHz
Frequency Range:  87,5 - 108 MHz
Usable Sensitivity:   25,2 dBf
50 dB Quieting Sensitivity (stereo):  52,2 dBf
Signal-to-Noise Ratio (stereo):  66 dB
Distortion (stereo):  0,5%
Frequency Response:  30 Hz - 15 kHz ±2,5 dB
Image rejection:  60 dB
If Rejection:  65 dB
Stereo Separation (stereo):  37 dB (ref. 1 kHz)
MW, AM Section
Intermediate Frequency:  450 kHz
Frequency Range:  522 - 1611 kHz
Usable Sensitivity (20 dbS/N):  73,2 dBf
Signal-to-Noise Ratio:   45 dB
Distortion:  1,5%
Image Rejection:  28 dB
Frequency Response:  100 Hz - 2 kHz (-3 ±3 dB)
LW Section
Intermediate Frequency:  450 kHz
Frequency Range:  153 - 281 kHz
Usable Sensitivity (20 dbS/N):  89,2 dBf
Distortion:  1,5%
Image Rejection:  28 dB
IF Rejection:  25 dB
General Section
Semiconductors:  20 ICs; 58 Transistors; 46 Diodes; 3 Zener Diodes; 1 FET
Power Supply:  Ac 120/220/240 V 50/60 Hz
Dimensions (W x H x D):  438 x 115 x 330 mm
Weight:  9 kg

Luxman LV-112 amplifier

Luxman Integrated Amplifiers all employ voltage-driven amplification for optimum dynamic performance with negligible transient intermodulation or slew induced distortion. In addition all use High Energy power supplies with high filter capacitance to provide the steady state and dynamic power necessary for proper reproduction of even the most demanding musical transients.

The LV-112 presents such Luxman features as a subsonic filter to remove very low frequency components resulting from warped records, tone arm resonances or other causes, and "Line Straight" which bypasses tone and other controls for the shortest direct path to the power amplifier ensuring the best possible fidelity, imaging and sonic impact.

Rated Continuous Power Output:  55 W per channel (20-20,000 Hz, 8 Ω at rated T.H.D.)
Dynamic Power Output:  120 W at 4 Ω; 150 W at 2 Ω
Peak Short-Circuit Current:  25 A (400 Hz toneburst, 5% duty cycle)
Total Harmonic Distortion:  0,05% (20-20,000 Hz, 8 Ω Full Power)
Intermodulation Distortion:  0,02% (60 Hz : 7 kHz = 4:1, 8 Ω, Full Power)
Signal-to-Noise Ratio:
Phono :  84 dB (re 5mV)
CD, Tape, Video :  95 dB (re 0,5V)
Frequency Response:
Phono (RIAA) :  20 Hz - 20,000 Hz ±0,5 dB
CD, Tape, AV, AUX :  6,5 Hz - 150,000 Hz (at -3 dB)
Power Supply: 110 - 120, 220 - 240 V 50/60 Hz
Dimensions (W x H x D): 17-1/4" x 5-3/8" x 14-3/8"
Weight:  19,8 lbs

Sony PS-1700 turntable

Stereo Turntable
The PS-1700 is a new introduction to our range of stereo turntables, incorporating belt drive and a high sensitvity static balanced tone arm. It comes complete with a Sony cartridge.
Automatic arm return and stop
Belt driven alluminium die-cast turntable
High signal to noise ratio, low wow and flutter
Precision pivot bearings and bias compensator for low distortion.

Type:  semi-automatic
Platter Diameter:  300 mm (11-13/16")
Speeds:  33-1/3 and 45 rpm
Drive System:  belt-drive
Motor:  4-pole semi-synchronous
Speed Control Range:  fixed (allowance ±2%)
Wow and Flutter:  less than 0,08% DIN 0,06% WRMS
Signal-to-Noise Ratio:  63 dB DIN
Tone-arm Type:  Static balanced
Overal Arm Length: 300 mm (11-13/16")
Pivot to Stylus:  8-1/2 inches (216,5 mm)
Overhang:  21/32 inch (15,5 mm)
Trackening Error:  +3° -1°
Stylus Force adj. Range:  0 - 3 g
Anti-skating adj. Range:  0 - 3 g
Shell Weight:  7,5 g
Cartridge Weigt Range:  4 - 8 g
Cartridge Type:  VL-32 G
Channel Separation:  25 dB at 1 kHz
Output Voltage:  4 mV at 1 kHz, 3 mV at 1 kHz
Load Impedance:  50 - 100 k Ω (50 k Ω recommended)
Tracking Weight:  2 g recommended
Stylus:  ND 135G conical, 0,5 mil diamond
Power Requirements:  AC 110, 127, 220 and 240 V 50/60 Hz
Dimensions (W x H x D):  445 x 160 x 370 mm (17-1/2" x 6-1/4" x 14-5/8")
Weight:  7,4 kg (16,5 lbs)