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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





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JVC RX-8SD receiver

All the technology you need to build your own home A/V system

The RX-8SD comes with all the technology you need to enjoy theater sound from the videos you watch at home. Dolby Pro Logic Surround, high power for three front channels, our exclusive Theater DAP and three video connections ensure your enjoyment. But our new receiver is also designed for high musical purity, featuring high stereo power output, low-impedance (4 Ω ) driving capability. Advanced Super-A and gold-plated terminals. Turn to JVC for entertainment in style.

 

High power for three front channels.

Set for Dolby Pro-Logic mode, the RX-8SD delivers the same high power to the front left, right and center channels. Equal high power for all three front channels ensures that sound and dialog are firmly locked to the screen, to dramatically enhance the sense of being in a theater.

 

Dolby Pro Logic Surround and Theater DAP

Dolby Pro Logic lets you experience the realistic equivalent of theater sound at home when you watch videos. With the RX-8SD, the sound is digitally processed for precise localization, low distortion and wide dynamic range. Theater DAP (Digital Acoustics Processor) enhances the sense of being in a theater with added hall reverberations.

 

Independent center-channel tone control

An independent center-channel control ensures you enjoy consistent and balanced sound from three front speakers, even it they are of different designs.

 


Specifications

Amplifier Section

Output Power

Stereo Operations:  85 watts per channel,, min. RMS both channels driven into 4 Ω , 20 Hz to 20 kHz with no more than 0,007% T.H.D.

Surround Operation

Front Channels:  80 watts per channel, min. RMS, driven into 4 Ω  at 1 kHz with no more than 0,7% T.H.D.

Center Channel:  80 watts, min. RMS, driven into 4 Ω  at 1 kHz with no more than 0,7% T.H.D.

Rear Channels :  20 watts per channel, min. RMS, driven into 4 Ω  at 1 kHz with no more than 0,7% T.H.D.

Total Harmonic Distortion :  0,007% at 85 watts output (4 Ω , 1 kHz)

Frequency Response

Phono :  20 Hz - 20 kHz ±0,5 dB (4 Ω )

CD, Tape 1, Tape 2, VCR, Video 1, Video 2 :  10 Hz - 30 kHz (±1 dB. 4 Ω )

Signal-to-Noise Ratio ('66 IHF/ '78 IHF)

Phono :  70 dB/78 dB (at Rec Out)

CD, Tape 1, Tape 2, VCR, Video 1, Video 2 :  91 dB/ 80 dB

RIAA Phono Equalization:  ±0,5 dB (20 Hz - 20 kHz)

Audio Input Sensitivity/Impednace (1 kHz):

Phono :  2,0 mV/47 k Ω

CD, Tape !, Tape 2, VCR, Video 1, Video 2 :  200 mV/47 k Ω

Audio Output Level:

VCR, Tape 1, Tape 2 :  200 mV

Video Input Sensitivity/Impedance:

VCR, Video 1, Video 2 :  1 Vp-p/75 Ω

Video Output Level

VCR, Video 1, Video 2 :  1 Vp-p(at 1 Vp-p input)

Synchronization:  Negative

Signal-to-Noise Ratio :  45 dB

Tuner FM Section

Tuning Range:  87,5 - 108,0 MHz

Usable Sensitivity:  10,8 dBf (0,95 µV /75 Ω )

50 dB Quieting Sensitivity

Monaural :  16,3 dBf (1,8 µV/75 Ω )

Stereo :  38,3 dBf (22,5 µV/75 Ω )

Signal-to-Noise Ratio (IHF-A Weighted)

Monaural :  80 dB at 85 dBf

Stereo :  73 dB at 85 dBf

Total Harmonic Distortion

Monaural :  0,15% at 1 kHz

Stereo :  0,2% at 1 kHz

Stereo Separation at Rec Out:  40 dB at 1 kHz

Capture Ratio:  1,5 dB

Alternate Channel Selectivity:  60 dB (±400 kHz)

Frequency Response:  30 Hz to 15 kHz (+0,5 dB -3 dB)

AM Tuner Section

Tuning Range:  530 to 1710 kHz

Usable Sensitivity:  300 µV/m (Loop antenna); 30 µV (external antenna)

Signal-to-Noise Ratio:  50 dB (100 mV/m)

General

Power Requirements: AC 120 V 60 Hz

Power Consumption:  400 watts  / 550 VA; 5 watts in standby mode

Dimensions (W x H x D):  435 x 156 x 412 mm (17-3/16" x 6-3/16" x 16-1/4")

Weight:  13,6 kg (30 lbs)


 

SAE 5000 noise reduction system


Impulse Noise Reduction System
Ever since the invention of the recorded disc, annoying "clicks" and "pops" caused by scratches, static, and other imperfections, have consistently disturbed the listening pleasure of mysic lovers. Now, SAE introduces the unique model 5000, an Impulse Noise Reduction System which eliminates those unwanted sounds with no adverse effect on the quality of the recorded material.
This break-through in electronic circuitry is so demonstrably effective, that the SAE 5000 is destined to beacome an essential part of any sound system.
The SAE 5000 is compact and sleek, built to SAE's exacting standards, and ready to enhance the performance of any system, from the standard receiver/turntable combination to the most sophisticated audiophile components.
Before the technological break trough achieved by the 5000, there were many records that offered less than ultimate performance and some which were rendered virtually unlistenable due to the presence of impulse noise. Impulse noise is generated by static discharge, record blemishes or accumilation of dirt, and is often referred to as "clicks"  and "pops". Now, with the 5000, most of these problems can be overcome. Many virtually lost recordings can be played again with their fidelity unnamed by impulse noise. Ofcourse, unblemished recordings can be played without being adversely affected by the 5000. only sounds which are detected as impulse noise are eradicated. All else remains. Old recordings, even 78 rpm's may be rejuvenated by our new system.
The circuitry in the SAE 5000 is the result of extensive research and evaluation by its inventor, Jack Sacks, into the field of impulse noise.
At the start of research a careful statistical analysis was made of impulse noise and those properties which are unique to it. From this information a logic circuit was developed for the 5000 which constantly monitors the music, searching for those unique parameters which  indicate the presence of impulse noise. Upon detection of the presence and duration of the offending impulse, which is accomplished by examining the shape of the "spike", and other parameters, the noise removal circuit comes into play which deletes pnly the damaged segment from the sound sequence. Because the duration of this impulse noise is usually so minute, (less than one thousandth of a second), it is possible to extrapolate forward a tiny segment from the music information immediately preceding the gap and thus maintain total continuity and integrity at the same time. This technique is undetectable to the ear and does not adversely affect the frequency response, dynamic range, or spectral balance of the music. The system remains passive and "transparent" at all times, doing its job only when called upon by the detection of unwanted noise.

The SAE 5000 has simple and effective controls. The principal control is a threshold adjustment which varies the sensitvity of the detection circuit. Different record characteristics may require some sensitivity adjustment.
There is a system defeat button which allows the Impulse Noise Reduction (INR) circuit to be bypassed electrically. A tape monitor switch and rear mounted jacks reconnect the tape monitor circuitry used to hook up the 5000.
Finally, the incredible effectiveness of the INR system can be demonstrated by activating the Invert switch. This action reverses the active circuitry and you  are now able to hear Only the noise your system eliminates while in the operating model.

Specifications:
Total Harmonic Distortion (at any level to rated output from  20 Hz to 20 kHz):  less than 0.1%  Intermodulation Distortion (at any level or rated output with  any 2 mixed frequencies between  20 Hz to 20 kHz at 4/1 Voltage Ratio):  less than 0.1%
Signal-to-Noise Ratio:  greater than 90 dB (below rated output)
Rated Output:  2.50 Volts RMS
Frequency Response:  ±1 dB (20 Hz to 20kHz)
Output at Clipping:  greater than 9 Volts into 10 K Ω  
Input Impedance:  75 K
Ω 
Output Source Impedance:  500 Ω 
Output Lead Impedance:  600 Ω  (minimum)
Insertion Loss:  less than 1 dB
Power Supply / Consumption:  110-125 VAC, 50 Hz to 60 Hz / 7 watts
Dimensions (W x H x D):  10.75" x 3"  x  9.25"
Shipping Weight:  8 Ibs.
Rack Mount Kit available

KLH-1 and Analog Bass Computer

 KLH-1
The most dramatic expression of computer control technology
Uncompromising. That's as close as any single word comes to describing the performance of the new KLH-1. It is certainly one of the finest speakers ever made. Its twin computer controlled woofers provide flat bass all the way down to 30 Hz (-3 dB). Like the KLH-2 and KLH-3, it has polypropylene cones for a clear, uncolored mid-range and high end - with remarkable smoothness and clarity - and a control that lets you adjust the response for room placement.

The KLH-1 is our largest computer-controlled model. At 11" x 30-1/2" x 10-1/4", though, it's not much larger than most bookshelf speakers. yet the clarity, the openless, the precise stereo imaging, and, of course, the accurate wellcontrolled bass of the LKH-1 can be compared with loudspeaker systems of any size. And at any price.
Audition the KLH-1 against the toughest competition you can think of. With any type of music you like. You simply won't find anything better.
 The KLH Analog Bass Computer, supplied with the speakers is a separate component which connects to your receiver or amplifier. It continually monitors the bass signal and automatically controls woofer excursion as the needs of the music dictate, to prevent, distortion.
The Analog Bass Computer allowed us to design speakers closer to their theoretical performance than ever before.
What this means is a line of speakers that can reproduce clean tight bass equal to optimally designed acoustic suspension speakers four times their size.

In fact KLH computer controlled speakers will outperform comparably prieced speaakers regardless of size. They, finally obsolete the notion that great sound requires great furniture.
 Analog Bass Computer technology is such a big step forward in speaker design, we could have easily quit right there. But we didn't.
After researching a wide range of speaker cone materials, we chose polupropylene - a material first developed for speaker use by BBC engineers.
The movement of the polypropylene cone more faithfully reflects the electrical signal than either paper or bexterne cones. So it reduces coloration caused by "break-up" - uncontrolled cone movement.
The result is exceptional definition and clarity in the midrange - particularly noticeable on the sounds which are most familiar, such as the human voice, hand clapping, and the subtle ambiance around instruments and singers. Of course, we chose the other elements of our speakers with equal care.
Instead of stamped steel baskets to support the speaker cones ours are precision die cast.
Our magnet, assemblies are massive - bigger than those found on much larger speakers.
We even added an acoustically absorbent foam baffle around our high-range drivers, for smoother response and clear precise stereo imaging.
Finally, we use genuine walnut veneers in our cabinet construction. Because we think a speaker should look as good as it sounds.
Specifications:
Designed for vertical use on stand supplied.
1,25 cu.ft./35 litre floor standing speaker system, with Analog Bass Computer.
Optimally designed equalied sixth-order system.
-3 dB at 30 Hz, 105 dB s.p.l. (system in room)
Sensitivity:  87 dB/1W/1m at 1 kHz
Drivers:
Two new 200 mm KLH woofers with polypropylene cones, cast baskets
New 100 mm KLH mid-range with polypropylene cone.
New 25 mm KLH tweeter.
Acoustically absorbent foam on front baffle reduces high frequency diffraction effects, improves stereo imaging and smoothness of response.
Suggested for use with receivers or amplifiers of 2 x 40W to 2 x 200W
Controls:  Computer in/out; tape monitor, Low frequency position compensation; High frequency , and amplifier overload indicators.
Dimensions:
Speakers :  280 x 775 x 260 mm (11" x 30-1/2" x 10-1/4")
Analog Bass Computer :  60 x 270 x 150 mm ( 2-1/2" x 10-1/2" x 6")
Shipping Weight:  57 kg ( 125 lbs)

Finish: speaker finished in genuine walnut veneer - black removable grille. Speaker stands included

JBL SE 400S

 JBL  SE-400S Energizer - this is the free-standing JBL 80 watt solid state stereo Energizer, suitable for placement anywhere. It can be enclosed in an equipment cabinet, stored out of sigh in any convenient location. Many users prefer to exhibit the award-winning design of the SE-400S as a decor accent on open surfaces. It is electronically identical to the SE-408S, and incorporates the same selection of JBL equalizer boards to perfectly complement the requirements of all JBL speaker Systems, as well as systems made by other manufacturers.
Specifications:
(All specifications are measured with both channels operating simultaneously into 8 Ω loads. AC line voltage is held to 117 volts, 60 cycles. In normal operation, the performance of the SE-400S  is not appreciably affected by line voltage fluctuations between 110 and 127 volts.)

Power Output: 
80 watts continuous RMS power;
40 watts per channel, at any frequency from 10 cps to 30,000 cps
Frequency Response:  with equalizer boards inserted for unequalized operation):
±0,25 dB form 20 cps to 20,000 cps
±1,5 dB from 3 cps to 175,000 cps
Harmonic Distortion:  less than o,15% from 20 cps to 20,000 cps at 80 watts or any level less than 80 watts
Intermodulation Distortion:  less than 0,15% at 80 watts or any level less than 80 watts (IHF standard 60 - 7,000 cps, 4 : 1 ratio)
Sensitivity:  0,8 to 3,0 volts input for rated output, depending upon the particular equalizer boards installed.
Hum and Noise:  90 dB below rated output
Transient Response:  with equalizer boards set for unequalized operation, rise time is 2,0 microseconds from 10% to 90 % of square wave signal at 160 watts peak power or any lower power level. Response to such square wave signals is free from detectable overshoot or ringing, as observed on an oscilloscope.
Overload Recovery:  less than 1/10th of one cycle to recover from 100% single cycle overload at any frequency from 20 to 20,000 cps
Output Impedance:  8 Ω rated impedance
(when driving a 16 Ω load, the SA-600 meets all published specifications except that power output is reduced to 64 watts. Wen driving a 4 Ω load the SA-600 produces 130 watts of undistorted power for brief periodes of time.  Prolonged operation at more than 40 watts per channel however will trigger the built-in automatic overload devices.
Stability:  The SE-400S, like the SA-600, utilize the exclusive JBL T-Circuit. The circuit is completely stable when connected to any loudspeaker system or even to a capactive load. Specifeid distortion and stability without ascilation are maintained through extreme variations in output load, whether resistiv, capacitive or inductive. Moreover, AC line surges do not affect the stability of the circuit.
Short Circuit Protection:  Absolute, The SA-600 cannot be damaged by accidental or intentional short or open circuit at the output terminals, or by any degree of impedance mismatch.
Transistors: 22 silicon transistors plus 20 silicon diodes.
 Dimensions (W x H x D): 15-1/4" x 4-5/8" x 7-3/4"

JBL SE 408S

 JBL  SE-408S Transducer Energizer - takes the place of a conventional stereo power amplifier, mounts directly into the rear panel of JBL loudspeaker enclosures. Plug-in equalizer boards tailor the characteristics of the SE-408S to precisely match the requirements of the loudspeaker systems which it drives. Performance of such a self-Energized combination is audibly superior to that which can be realized from any all-purpose amplifier

Special Features:
Plug-in equalizer boards match the performance of each channel of the Energizer to the requirements of the particular loudspeaker system used; exact damping for best transient reproduction, final frequency response correction for smoothest response. With the boards inserted for unequalized operation, the Energized operates as a laboratory standard power amplifier of the highest quality.

Circuit:
The JBl T-Circuit is an analog computer-type operational DC amplifier, the most nearly perfect amplifying circuit ever developed. All stages are direct-coupled, including the output stage, so that accurate control of the loudspeaker is maintained all the way down to zero frequency.
Specifications:
(All specifications are measured with both channels operating simultaneously into 8 Ω loads. AC line voltage is held to 117 volts, 60 cycles. In normal operation, the performance of the SE-408S  is not appreciably affected by line voltage fluctuations between 110 and 127 volts.)

Power Output: 
80 watts continuous RMS power;
40 watts per channel, at any frequency from 10 cps to 30,000 cps
Frequency Response:  with equalizer boards inserted for unequalized operation):
±0,25 dB form 20 cps to 20,000 cps
±1,5 dB from 3 cps to 175,000 cps
Harmonic Distortion:  less than o,15% from 20 cps to 20,000 cps at 80 watts or any level less than 80 watts
Intermodulation Distortion:  less than 0,15% at 80 watts or any level less than 80 watts (IHF standard 60 - 7,000 cps, 4 : 1 ratio)
Sensitivity:  0,8 to 3,0 volts input for rated output, depending upon the particular equalizer boards installed.
Hum and Noise:  90 dB below rated output
Transient Response:  with equalizer boards set for unequalized operation, rise time is 2,0 microseconds from 10% to 90 % of square wave signal at 160 watts peak power or any lower power level. Response to such square wave signals is free from detectable overshoot or ringing, as observed on an oscilloscope.
Overload Recovery:  less than 1/10th of one cycle to recover from 100% single cycle overload at any frequency from 20 to 20,000 cps
Output Impedance:  8 Ω rated impedance
(when driving a 16 Ω load, the SA-600 meets all published specifications except that power output is reduced to 64 watts. Wen driving a 4 Ω load the SA-600 produces 130 watts of undistorted power for brief periodes of time.  Prolonged operation at more than 40 watts per channel however will trigger the built-in automatic overload devices.
Stability:  the SE-408S, like the SA-600, utilize the exclusive JBL T-Circuit. The circuit is completely stable when connected to any loudspeaker system or even to a capactive load. Specifeid distortion and stability without ascilation are maintained through extreme variations in output load, whether resistiv, capacitive or inductive. Moreover, AC line surges do not affect the stability of the circuit.
Short Circuit Protection:  Absolute, The SA-600 cannot be damaged by accidental or intentional short or open circuit at the output terminals, or by any degree of impedance mismatch.
Transistors:   22 silicon transistors plus 20 silicon diodes.
 Dimensions (W x H x D):  SE-408S :  15-1/4" x 4-5/8" x 6-3/4"

Technics SV-100

 SV-100 Digital Audio processor, designed for use with a VCR, provides very high quality digital audio processing for digital audio recording and playback.  Not only is the SV-100 compact, it weighs only 2,9 kg (net) making it the world's lightest digital audio processor.
This means that the SV-100 is ideally suited for portable use, especially when combined with the matching Panasonic NV-100 VCR.  Its attractive styling also complements other high quality audio components when used in a home hi-fi system.
 Advanced Semiconductor Circuitry for Compact Size
Sophisticated original LSI and microprocessor technology contributes to this processor's surprisingly compact size and light weight. The PCM signal processing LSI (MN6601) contains about 10,000 elements in a 6,08 x 5,58 mm chip; the playback LSI (MN6602) has about 15,000 elements in a 6,46 x 6,18 mm chip; the recording/playback control LSI has about 6,000 elements in 4,48 x 3,62 mm chip.
Together, these tree LSIs are equivalent to about 320 logic Ics. Instead of the conventional separate A/D and D/A converters, a single AD/DA converter is used for conversion from analog to digital and vice versa.  This revolutionary circuitry also means more dependable performance.
 Designed for Quick Precise Control
For quick and accurate adjustment, the SV-100 has a master level control and a stereo balance control. This unusual system is actually the most practical for most purposes such as recording FM broadcasts or Compact Discs. In both cases it is easiest to adjust same time and no stereo balance adjustment is usually needed. The same goes for live recording where the left and right  channel microphones are normally matched. Furthermore, the less used controls are of the slide switch type, so there is little danger of accidental misoperation.

2-Color FL meters for Accurate Indication
In digital as in analog recording, accurate meters are essential for correct recording level setting. However, with digital audio, it is all the more important not to set recording level  too high. Therefore, the SV-100 is equipped with precision FL meters that extend all the way from -50 dB to +6 dB. Since clipping occours above 0 dB, this wide-range metering system lets you see exactly where you should set recording level to avoid distortion. Comparate this with other digital audio processors that give only an "over" indication if recording level is too high.
 Versatile Connection Facilities
The SV-100 has two complete sets of video input/output jacks, one set on the side and one on the rear panel. This lets you use the Sv-100 in a vertical or horizontal position. The matching Panasonic NV-100 VCR has similar connection facilities so that the two are ideally suited for portable use. Of course, the SV-100 can be used with virtually any home VCR (or ¾-inch U-matic type VCR).

Suplied AC power Unit with Handy Video/Audio Switch
TheS V-100i s ready to use right away since it comes with its own AC power unit for home use. This compact  unit is designed to simplify connections while supplying power to the SV-100. It also works as a battery charger for the optional battery packs available for  the SV-100 On the AC power unit's front panel is a "recording" switch that lets you use your VCR for recording TV programs or for PCM digital recording without having to change any connections
 VCR Tracking Check and Battery Check Functions
A front panel slide switch lets you change the display from recording/playback level indication to VCR tracking and battery check indication. The VCR tracking readout tells you how well the video tape recorder's heads are tracking the recorded tracks during playback. You can then adjust the VCR to obtain optimum playback quality. This is particularly important if the tape is being played back on a different VCR from that used for recording. The battery check readout tells you how full the battery is and whether it needs charging.
Other Valuable Features
Built-in high quality mic amp.
Digital copy  output jack.
Mute cancel switch lets you hear sound in VCR's cue and review modes.
Headphone volume control.
Playback mode switch for optimum matching with VCR signal characteristics.
Rec mute switch
Specifications
Type:  Digital audio processor
PCM Standard:  FILE -- STC-008
Quantization:  Linear 14-bit
Decoding:  Linear 14-bit
Recording Time:  Max. 3 hours (when using the NV-E180 video cassette tape)
Channels:  2 (L, R)
Frequency Response:  2Hz - 20kHz (± 0.5 dB)
Harmonic  Distortion:  Less than 0,01% (1 kHz, 0 dB)
Dynamic Range:  More than 86 dB
Input Sensitivity/Impedance: 
Line :  30 mV (-15 dB) / 50 k Ω
Microphone :  0,7 mV (-15 dB) / 600 Ω
Video :  1 Vp-p / 75 Ω (Video format)
Output Level/Impedance: 
Line :  400 mV (-15 dB) / 600 Ω
Video :  1 Vp-p / 75 Ω (Video format)
Digital Copy :  1 Vp-p / 75 Ω
ACCESSORY FUNCTIONS
VCR tracking check, Battery check,
VCR playback mode switch (to match VCR characteristics) auto/off  playback muting  switch, Rec mute  switch, Playback (recording) mode indicator, Headphone volume control, Supplied AC power unit has battery charging and video/digital audio switching functions.
General
Power Supply: 
AC/DC/Car battery (DC 12V 1,6A using optional battery pack);
Exclusive AC power unit supplied (AC 110/120/220/240 V, 50/60 Hz)
Dimensions (W x H x D): 
Main Unit :  238 x 92 x 240 mm
Power Unit :  78 x 92 x 240 mm
Weight (approx):
Main Unit :  2,9 kg

Power Unit :  2,3 kg