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





Sony STR-V5 receiver

FM Stereo FM/AM Receiver

Sony leadership in every aspect of audio and video reproduction is legendary. That leadership is no accident, nor is it recent. It arises from three sources. First, the vast Sony research and engineering facilities, among the most sophisticated in the world. Second, a commitment to a "total system technology" in the design of all our products. And third, a commitment to translating this approach into instruments for the home that incorporate advanced technology at a cost within the reach of the user.

All vital component circuit elements are manufactured in our own plants, according to exacting tolerances and stringent quality control. Our concern with quality extends to human engineering and painstaking attention to detail, including precision finishing of controls. With every Sony component, there's a touch of luxury and a special  degree of convenience.

When it comes to testing component performance, the Sony standard is also high. And so are performance specifications, even though we quote them conservatively. In fact  it's hard to find a Sony component that won't surpass its rated performance specs.

 


Specifications

Amplifier Section

Continuous RMS Power Output (less than 0,07% T.H.D., both channels driven simultaneously)

At 20 Hz to 20 kHz :  85 +85 watts at 8  

Power Bandwidth (IHF):  10 Hz - 35 kHz

Damping Factor:  40 at 1 kHz, 8

Total Harmonic Distortion

Less than 0,07% at rated output

Less than 0,05% at 1 W output

Intermodulation Distortions (60 Hz : 7 kHz = 4 : 1)

Less than 0,07% at rated output

Less than 0,05% at 1 W output

Residual Noise:  less than 0,3 mV (A network)

Inputs Sensitivity/Impedance

Phono MM :  2,5 mV/50 k   (S/N 80 dB, A Weighting Network)

Aux, Tape 1 - 2 :  150 mV/100 k  (S/N 100 dB, A Weighting Network)

Output Voltage/Impedance

Rec Out 1, 2 :  150 mV/4,7 k

Headphones Output:  8   - 10 k  

Speaker Output:  8   - 16  

Frequency Response:

Phono 1, 2 :  RIAA equalization curve ±0,5 dB

Auz, Tape 1 - 2 :  5 Hz - 50 kHz +0 -2 dB

Tone Controls

Bass ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Filters

High :  6 dB/oct. Above 9 kHz

Low :  6 dB/oct. Below 50 Hz

Loudness Control (att. 30 dB)

+10 dB at 50 Hz

+3 dB at 10 kHz

FM Tuner Section

Tuning Range:  87,5 - 108 MHz

Antenna:  300   (balanced), 75   (unbalanced)

Intermediate Frequency:  10,7 MHz

Sensitivity at 50 dB quieting

Mono :  2,8 µV (14,5 dBf)

Stereo :  40 µV (37,3 dBf)

Usable Sensitivity: 1,7 µV (9,8 dBf, IHF)

Limiting Threshold:  1 µV

Signal-to-Noise Ratio

Mono :  76 dB

Stereo :  70 dB

Total Harmonic Distortion

Mono :  0,08%  at 1 kHz

Stereo :  0,25%  at 1 kHz

Intermodulation Distortion

Mono :  0,08%

Stereo :  0,25%

Separation at 1 kHz :  48 dB

Frequency Response:  30 Hz - 15 kHz +0,2 -1,5 dB

Selectivity:  75 dB at 400 kHz

Capture Ratio:  1,0 dB

AM Suppression Ratio:  60 dB

Image Response Ratio:  80 dB

IF Response ratio:  100 dB

Spurious Response Ratio:  100 dB

RF Intermodulation:  70 dB

Subcarrier Product Ratio:  60 dB

SCA Rejection Ratio:  60 dB

Muting Threshold:  approx 5 µV

AM Tuner Section

Tuning Range:  530 kHz - 1605 kHz

Antenna:  Built-in ferrite-bar antenna

External antenna terminal

Intermediate Frequency:  468 kHz

Uasbla Sensitivity:

200 µV/m (built0in antenna)

100 µV/m (external antenna at 1,000 kHz)

Signal-to-Noise Ratio :  50 dB at 50 mV/m

T.H.D. :  0,5% at 50 mV/m, 400 Hz

Selectivity:  40 dB at 10 kHz

Image Response Ratio:  40 dB at 1,000 kHz

IF Response Ratio:  40 dB at 1,000 kHz

General

Power Requirements:  110,120, 220 or 240 V AC Adjustable 50/60 Hz

Power Consumption:  135 W (US model), 430 500 W (E model- UK)

Dimensions (W x H x D):  525 x 195 x 450 mm (20-1/2" x 7-1/2" x 17-3/4")

Weight Net :  20,2 kg (44 lbs 1 oz)


 

Sony STR-V7 receiver

True, it's tempting to be swept up by our power.

150 watt's per channel minimum RMS at 8 ohms, from 20 Hz to 20 kHz, with no more than 0,07% Total Harmonic Distortion , is nothing to sneeze at.

But raw power means nothing. What's important is how that power is delivered. In the case of the STR-V7, it's brought to you by Sony in a very classy package.

You get a combination of features and control that are impressive on their own - but almost unheard of in a single machine. To start with, we've built in a Dolby system, for decoding Dolbyized FM broadcasts. The advantages of our tuner, though, need no decoding. They include a normal and narrow FM IF bandwidth selector. It makes life simple for people in areas where their signals are crowded together albow to elbow.

In our preamp section, the V7 comes equipped with a special phono EQ circuitry. Thanks to Sony's high IQ, it allows for direct connection of a low-output, moving-coil cartridge phono source. Without calling for an external step-up transformer or pre-preamp.

When you're gifted with as much power as the V7, you need a way to keep track of it. This receiver keeps table with two power output meters, monitoring the power being fed to the speakers. So overload can't result from oversight.

And all that power comes from our direct coupled DC power amp. And our power is stable, thanks to a high-efficiency, high regulation toroidal-coil transformer.

There's a lot more to the STR-V7 than power. This receiver takes the best that contemporary technology has to offer, and offers it in a single machine .

Other manufacturers may have the power to bring you power. But only Sony has the power to bring you more than just power

 


Specifications

System

Tuner Section:  Superheterodyne FM/AM Tuner

Power Amp Section :  Direct-coupled pure complementary parallel push-pull circuitry

Preamp Section:  Three-stage equalizer amp in direct-coupled design, NF type tone control amp

Amplifier Section

Continuous RMS Power Output (less than 0,07% T.H.D., both channels driven simultaneously)

At 20 Hz to 20 kHz :  150 +150 watts at 8  

At 1 kHz :  150 + 150 watts at 8

According to DIN 45500 :  150 +150 watts at 8

Dynamic Power Output (IHF Constant power supply method):  400 watts (8 )

Power Bandwidth (IHF):  10 Hz - 35 kHz

Damping Factor:  40 at 1 kHz, 8 ojm

Total Harmonic Distortion

Less than 0,07% at rated output

Less than 0,05% at 1 W output

Intermodulation DIstortion (60 Hz : 7 kHz = 4 : 1)

Less than 0,07% at rated output

Less than 0,0%% at 1 W output

Residual Noise:  less than 0,3 mV (A network)

Inputs Sensitivity/Impedance

Phono MM :  2,5 mV/50 k  (S/N 80 dB, A Weighting Network)

Phono MC :  0,25 mV/100  (S/N 65 dB, A Weighting Network)

Aux, Tape 1 - 2, Rec/Pb :  150 mV/100 k  (S/N 100 dB, A Weighting Network)

Output Voltage/Impedance

Rec Out 1, 2 :  150 mV/4,7 k

Rec/Pb :  40 mV/82 k

Headphones Output:  8  - 10 k  

Speaker Output:  8  - 16  

Frequency Response:

Phono 1, 2 :  RIAA equalization curve ±0,5 dB

Auz, Tape 1 - 2, Rec/Pb :  5 Hz - 50 kHz +0 -2 dB

Tone Controls

Bass ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Filters

High :  6 dB/oct. Above 9 kHz

Low :  6 dB/oct. Below 50 Hz

Loudness Control (att. 30 dB)

+1 dB at 50 Hz

+3 dB at 10 kHz

FM Tuner Section

Tuning Range:  87,5 - 108 MHz

Antenna:  300  (balanced), 75  (unbalanced)

Intermediate Frequency:  10,7 MHz

Sensitivity at 46 dB quieting (40 kHz deviation)

Mono :  3,8 µV (16,8 dBf)

Stereo :  45 µV (38,3 dBf)

Usable Sensitivity

1,3 µV ((S/N 26 dB, 40 kHz deviation)

1,7 µV (9,8 dBf, IHF)

Limitting Threshold:  1 µV

Signal-to-Noise Ratio (40 kHz deviation)

Mono :  70 dB

Stereo :  65 dB

Total Harmonic Distortion (40 kHz deviation)

Mono :  0,08% (Normal), 0,2% (Narrow) at 1 kHz

Stereo :  0,15% (Normal), 0,4% (Narrow) at 1 kHz

Intermodulation DIstortion (40 kHz deviation)

Mono :  0,08% (Normal), 0,2% (Narrow) at 1 kHz

Stereo :  0,15% (Normal), 0,4% (Narrow) at 1 kHz

Separation at 1 kHz :  48 dB (Normal), 40 dB (Narrow)

Frequency Response;

40 Hz - 12,5 kHz +0,2 -1,0 dB

30 Hz - 15 kHz +0,2 _1,5 dB

Selectivity

300 kHz :  30 dB (Normal), 55 dB (Narrow)

400 kHz :  55 dB (Normal), 80 dB (Narrow)

Capture Ratio:  1,0 dB

AM Suppression Ratio:  60 dB

Image Response Ratio:  80 dB

IF Response ratio:  100 dB

Spurious Response Ratio:  100 dB

RF Intermodulation:  70 dB

subCarrier Product Ratio:  60 dB

Muting Threshold:  approx 5 µV

AM Tuner Section

Tuning Range:  530 kHz - 1605 kHz

Antenna:  Built-in ferrite-bar antenna

External antenna terminal

Intermediate Frequency:  468 kHz

Uasbla Sensitivity:

200 µV/m (built0in antenna)

100 µV/m (external antenna at 1,000 kHz)

Signal-to-Noise Ratio :  50 dB at 50 mV/m

T.H.D. :  0,5% at 50 mV/m, 400 Hz

Selectivity:  35 dB at 10 kHz

Image Response Ratio:  40 dB at 1,000 kHz

IF Response Ratio:  40 dB at 1,000 kHz

General

Semiconductors:  8 ICs; 4 fet; 69 Transistors, 36 Diodes

Power Requirements:  110,120, 220 or 240 V AC Adjustable 50/60 Hz

Dimensions (W x H x D):  525 x 195 x 450 mm (20-1/2" x 7-1/2" x 17-3/4")

Weight Net :  21 kg (46 lbs 5 oz)


 

McIntosh C-100 preamplifier

Controller and Preamplifier

 

The McIntosh C100 Preamplifier/Controller is without question the finest audio preamplifier ever created. No design compromises were allowed in the quest for a preamplifier with absolute accuracy, total sonic purity and virtual elimination of distortion and audible noise. For those who have been searching for their "Last Preamplifier" your search is over.

 

Full features Remote Control

Full featured RC is included that will allow complete control of all front panel controls and switches

 

Power Control Output

A Power Control connection for convenient turn on of McIntosh power amplifiers and accessories is included.

 

Dual Chassis Design

Dual-Chassis design completely separates all power supply, microprocessor and control circuits from the pure audio circuits for total noise isolation

 

Balanced and Unbalanced Inputs/Outputs

Three balanced high level inputs, three balanced main outputs and one balanced tape output, are provided. Eight unbalanced inputs, three unbalanced outputs as well as listen and record processor loops are included.

 

Precision Tracking Volume Control

Volume levels are controlled by a microprocessor controlled logarithmic attenuator with a tracking accuracy of 0,1 dB. Levels change in 213 individual 0,5 dB steps.

 

Precision Volume Display

The front panel digital Volume display indicates the preamplifier gain in dB or percentage of available volume

 

Precision Parts

Only the finest precision 1% tolerance resistors and polypropylene capacitors are used throughout

 

Moving Coil and Moving Magnet Phono Input

Separate shielded precision RIAA phono preamplifier for low output moving coil phono cartridges, utilizes two double mu metal shielded, silver wire, step-up transformers. Precision RIAA phono preamplifier for moving magnet cartridges.

 

Ultra Low Distortion

Distortion levels of all types are less than 0,002%. Music is amplified with total transparency and accuracy

 



Specifications

Frequency Response:  10 Hz - 40,000 Hz +0 -0,5 dB

Total Harmonic Distortion :  0,002% (from 10 Hz to 40,000 Hz)

Signal-to-Noise Ratio : 

Phono :  86 dB

High Level :  100 dB

Max. Voltage Output:

Balanced :  25 V rms

Unbalanced ;  12 V rms

Output Impedance:  50  

Sensitivity

Phono MM :  4,4 mV for 2,5 V rated output (1mV IHF)

Phono MC :  100 µV for 2,5 V rated output

High Level:  450 mV for 2,5 V rated output

Input Impedance

Phono MM :  47 k  (65 pF)

Phono MC :  10

High Level :  22 k  (unbalanced), 44 k  (balanced)

Max. Input Signal:

Phono MM :  50 mV

High Level :  5 V (unbalanced), 5 V (balanced)

Power Requirements:  100, 110, 120, 220, 230, 240 V, 50/60 Hz at 30 watts

Dimensions (W x H x D):  445 x 137 x 445 mm (17-1/2" x 5-3/8" x 17-1/2")

Weight:  31,8 kg (70 lbs)shipping


 

Sony PS-X700 turntable

The Biotracer Tonearm in a Popular Format

The exquisite performance of the Biotracer tonearm plus the ability to use universal-mount headshells and integrated cartridge/headshell combinations make the PS-X700 a popular choice for a large number of music lovers.

Outstanding Features

Biotracer tonearm elicits the best performance from widest variety of cartridges.

Biotracer actively damps tonearm resonance and achieves wide stereo separation

Biotracer controls tracking force, anti-skating and tonearm automatic functions

Automatic zero-balance for fast interchange of cartridges

Digital readout of stylus force

Tonearm and Functions

Tonearm accepts universal headshells as well as cartridge/headshell combinations

Adjustable tonearm height for optimum tracking without added mass of cartridge shims

Advanced fully-automatic operation is silent and responsive for total convenience

Tonearm may be "indexed" left and right at high or low speed without lifting dust cover

Feather-touch controls respond to the slightest finger contact for fast, effortless function selection

Automatic record-size selector permits precise and safe indexing

Audio muting circuit provides silence during start, return, and cueing phases

Luminous and-of-disc sensor frees the tonearm from mechanical linkages for improved sensitivity

Capable of operation in synchronization with selected Sony cassette decks using the optional Sony RM-65

"repeat" mode for continuous music

 


Drive System Technology

The Sony Linear Torque BSL motor for smooth, precise rotation

Most direct-drive motors generate their power with an array of electromagnets mounted in a circle within a rotor ring. As the rotor turns, the torque increases and decreases as a result of the spaces  - "slots" - between the electromagnets. The wavering-force effect is called "cogging". Sony has eliminated cogging with the remarkable BSL motor. There are no brushes, no slots, and the magnetic force is constant. Cogging is impossible, and the torque delivered to the platter is uniform, smooth, and even. As a further benefit, the Sony brushless design makes the BSL motor unusually quiet, durable and trouble-free.

 


Magnetic servo control for superior accuracy.

Because household voltage itself is not without fluctuations, no direct-drive motor can be depended on - by itself - to maintain absolutely constant speed. Most good direct-drive turntables, therefore, have introduced servo electronics, which monitor the speed at which the motor turns and adjust the electrical input to correct for deviations.

Most servo systems depend on a generator, mounted within or below the motor, to monitor motor speed and feed that information back to the control circuits. High-quality turntables use pulse frequency generators for improved accuracy. These Sony turntables are better still. They offer markedly increased accuracy. These Sony turntables are better still. They offer markedly increased accuracy with the Magnedisc system, which monitors the turning speed, not at the motor, but at the outer rim of the platter where there is room for many more pulses. Based on Sony-developed technology for computer-controlled precision machinery, this system uses a magnetic pickup head to read the 512 pulses imprinted on the platter's outer rim. The information is relayed to the servo control so rapidly and precisely that any speed variation is corrected before it can affect the musical signal.

 


Specifications

Turntable

Platter:  320 mm (12-5/8-inch) aluminum-alloy diecast

Motor:  Linear torque BSL (brushless and slotless) motor

Drive System:  Direct drive

Control System:  Quartz lock control, magnedisc servo control system

Speed :  33-⅓ and 45 rpm

Starting Characteristics:  Comes to nominal speed within a half revolution (33-⅓ rpm )

Wow and Flutter:  0,015% (WRMS)

Signal-to-Noise Ratio :  78 dB (DIN-B)

Load Characteristics:  0% up to 150 g stylus force (at lead-in groove of a record)

Speed Deviation:  Within ±0,003%

Automatic System:  lead-in, return, reject, repeat, record size selection, tonearm balance

Tonearm

Type:  Electronic universal tonearm

Pivot-to-stylus Length:  235 mm (9-3/8")

Overall Arm Length:  315 mm (12-1/2")

Overhang:  13 mm (1/2")

Tracking Error:  +2°40' to -1°40'

Stylus Force Adjustment Range:  0,5 - 3,0 g (electronic adjust,)

Cartridge Shell Weight:  7,7 g

Cartridge Weight Range (including supplied shell):  9,7 - 16,7 g (15- 22,7 g with extra weight)

Height Adjustment Range:  within 6 mm

General

Power Requirements:  120 V AC, 220 - 240 V, 50/60 Hz

Power Consumption:  12 W

Dimensions (W x H x D):  480 x 165 x 420 mm (19" x 6-1/2" x 16-5/8")

Weight:  12,5 kg (27 lbs 9 oz) Net


 

Sony PS-X55S turntable

Computerized Convenience and performance

The PS-X55s is a deluxe turntable in every way. Full automation, microcomputer control , and the ability to operate in synchronization with selected Sony cassette decks make the X55S a logical choice for the discerning music lover.

Outstanding Features

Advanced fully-automatic operation for total convenience

Automatic record-size selector permits precise and safe indexing

Feather-touch controls respond to the slightest finger contact for fast, effortless function selection

Straight Duralumin tonearm for low mass and excellent tracking

 


 

Tonearm and Function

Two-point tonearm support for high rigidity and low modulation noise

Discrete tonearm servo motor for continuous, smooth and uniform action independent of platter rotation

Luminous and -of-disc sensor frees the tonearm from mechanical linkages for improved sensitivity

Front controls provide convenient operation - even with the dust cover closed.

Audio muting circuit provides silence during start, return, and cueing phases.

Capable of operation in synchronization with selected Sony cassette decks using the optional Sony RM-65

"Repeat" mode for continuous music

Turntable and Construction

Quartz lock with Magnedisc servo control prevents even minute speed variations caused by external factors

The Sony Linear Torque BSL (brushless, slotless) motor designed for uniform and smooth delivery of torque

Electromagnetic braking provides rapid and smooth half of platter rotation

Sony Bulk Molding Compound (SBMC) base is both rigid and acoustically inert to reduce feedback

Adjustable gel-filled feet isolate turntable from external vibrations

 


Specifications

Turntable

Platter:  310 mm (12-1/4-inch) aluminum-alloy diecast

Motor:  Linear BSL (brushless and slotless) motor

Drive System:  Direct drive

Control System:  Crystal lock control, magnedisc servo control system

Speed :  33-⅓ and 45 rpm

Starting Characteristics:  Comes to nominal speed within a half revolution (33-⅓ rpm )

Wow and Flutter:  0,02% (WRMS)

Signal-to-Noise Ratio :  78 dB (DIN-B)

Load Characteristics:  0% up to 100 g stylus force (at lead-in groove of a record)

Speed Deviation:  Within ±0,003%

Automatic System:  lead-in, return, reject, repeat, record size selection

Tonearm

Type:  Statically balanced

Pivot-to-stylus Length:  216,5 mm (8-1/2")\

Overall Arm Length:  300 mm (11-7/8")

Overhang:  16,5 mm (21/32")
tracking Error:  +3° to -1°

Stylus Force Adjustment Range:  0 - 25 g

Cartridge Shell Weight:  5 g

Cartridge Weight Range (including supplied shell):  7,5 - 11,5 g (11- 15 g with extra weight)

General

Power Requirements:  120 V AC, 220 - 240 V, 50/60 Hz

Power Consumption:  12 W

Dimensions (W x H x D):  430 x 135 x 375 mm (17" x 5-3/8" x 14-7/8")

Weight:  8 kg (17 lbs 10 oz) Net


 

Harman/Kardon hk670 receiver

 

Twin Powered DC coupled Ultrawideband AM/FM Stereo Receiver

 

Harman kardon engineering has one goal; to reproduce music in the home with uncompromising accuracy. Modern recordings rival the tonal balance, clarity and detail of the concert hall. A superior component must reproduce these characteristics faithfully.

It must deliver all the music.

The hk670 receiver is one of a new series from Harman Kardon designed, built, and tested with new understandings that go far beyond conventional ideas about distortion and the factors that make one component sound better than others. They are the most musically accurate receivers ever devised.

Features:

60 watts per channel

Ultrawideband design

Excellent pahse linearity

Superb transient response

Twin powered

Electronic circuit protection

DC coupled, low feedback power amplifier

Subsonic and high cut fiters

Tone control bypass

2-way tape duplication

Sensitive, selective FM section and new, low-noise FM section

SMQ tuning meter

LED FM in-tune indicator

Switchable interchannel noise suppression

Parallax-free tuning dial

Speaker selector switches

Soft-touch switches and controls

 


Specifications

Power Output: 

60 watts (min. RMS per channel , both channels driven into 8  from 20 Hz - 20 kHz at less than 0,06% T.H.D.)

75 watts (DIN 45 500) at 8

Power Bandwidth:  8 Hz to 100 kHz at less than 0,08% T.H.D. into 8 , both channels driven simultaneously, at 30 watts rms per channel

Total Harmonic Distortion 0,03% (1 kHz at rated output)

Intermodulation Distrotion:  0,05% at rated output

Frequency Response:  below 3 Hz to 140 kHz -3,0 dB

Damping Facyor:  better than 30 at 8

Hum and Noise

Phono :  -90 dB A Weighted IHF

Aux :  -102 dB A Weighted IHF

Residual :  -102 dB A Weighted IHF

Slew Rate :  65 V/µsec

Square Wave Rise Time:  2,5 µsec at 20 kHz

Square Wave Tilt:  less than 2% at 20 Hz

Overall Negative fFeedback:  28 dB

Phono Sensitivity:  2,2 mV

Phono Overload:  better than 225 mV

Phono Equalization:  ±0,5 dB

Phono Input Impedance:  47 k

High Level Sensitivity:  130 mV

Usable FM Sensitivity [mono]:  1,9 µV

50 dB Quieting:  3,0 µV [mono], 30 µV [stereo]

FM Noise:  -75 dB

Captire Ratio:  1,2 dB

Alternate Channel Selectivity:  -75 dB

Image Rejection:  - 80 dB

IF Rejection:  -110 dB

AM Rejection:  -62 dB

Stereo Separation:  55 dB at 1 kHz

FM Distortion

Mono :  0,05% at 1 kHz, 100% modulation

Stereo :  0,08% at 1 kHz 100% modulation

FM Frequency Response:  20 Hz to 15 kHz ±0,5 dB

AM Sensitivity:  300 µV/meter

AM Selectivity:  - 40 dB

Aalternate Channel Selectivity:  35 dB

Image Rejection:  -50 dB at 1 kHz

IF Rejection:  -45 dB at 1 kHz

Dimensions (W x H x D):  476 x 159 x 360 mm (18-1/2" x 6-1/4" x 14")

Weight:  12 kg (26 lbs)