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





BIC T-4M cassette deck

T-4M Two-speed cassette deck
3-Head Dual Capstan, MPU Control, Bias Trim, Metal Tape

At 1-7/8, it outperforms other assette decks. At 3-3/4, it's in the open-reel class. BIC introduces the T-4M. With full-metal tape capability, and performance so unpecedented it puts cassette technology on a new plane. Thanks to BIC's eclusive broadband Electronics, at 1-7/8 ips the T-4M ranks with the world's finest cassette decks. At 3-3/4, it challenges even expensive open-reel machines. The number speak for themselves; guaranteed frequency response of 20 Hz to 23 kHz ±3 dB at 3-3/4 on 70 µSec tape (20 Hz to 21 kHz at 1-7/8).
Specifications
Type:  Front loading Vertical type
Input power:  40 watts max
Input:  Line 250 mV
Mic :  3 mV
Outputs:
Line :  2,0 V ±2 dB
Headphone :  200 mV
Wow and Flutter:  4,76 cm/sec ±2%
Fast Forward and rewind Time:  47 sec. Typical
Frequency Response:  31,5 Hz to 14 kHz
Heads
Rec/Play :  two gape one housing combination Ferrite core
Erase ;  Double gap Sen-Alloy head
Capstan Motor:  Two speed electrical Governor Controlled DC Type
Reel Motor:  Mechanical Governor Controlled DC Type
Level meter:  45 dB full scale LED peak meter
Tape Counter:  3 digits LED Digital Type
Power Requirement:  105 to 132 V AC, 50.60 Hz
Dimensions (W x H x D):  440 x 164 x 257 mm (17-1/3 x 6-1/2 x 10-1/10 inch)
Weight:  8,4 kg (18,5 lbs)



ADC Sound Shaper Three equalizer


ADC has four Sound Shaper frequency equalizers that will improve your sound system. No matter how good it is. And at a cost that's lots less than trading in your components.
ADC Sound Shaper will improve your speakers. By extending thr true bass response, including the critical mid bass. ADC Sound Shaper will improve the relationship between your cartridge and speakers. From one of partial incompatibility to total compatibility.
They'il also eliminate rumble (low frequency overload), tape hiss and record scratches. And that only scratches the surface of what ADC Sound Shapers can do. For instance, the walls, carpeting and furniture of your listening room physically bounce sound around so that some spots have less sound than other spots. Lots less. ADC Sound Shapes will bring these "dead" spots to life.
Perhaps best of all, though, is a Sound Shaper's ability to let you re-equalize what a recording engineer mixed. If a horn section is overwhelming a piccolo, for example, you just slide the appropriate frequency lever. Presto, more piccolo. You can also vanquish a voice. Or boost a tube. Sound Shapers segment the entire spectrum of sound. To let you re-shape a sound track to your personal musical preferences. It's all the control you've ever dreamed of but never dreamed possible.
To get into equalizers, start with our Sound Shaper One which operates in five frequency ranges. Or our Sound Shaper One Ten which gives you greater control by operating in ten frequency ranges.
For more professional equalizers, there's our Sound Shaper Two MkII which functions in twelve frequency ranges with a two-channel LED meter And there's our new Sound Shaper Three Paragraphic Equalizer.
It combines all the advantages of a graphic equalizer with all the advantages of a perametric equalizer. Twelve primary frequency controls per channel. Plus twenty-four ancillary control positions per channel. The Sound Shaper Three is the ultimate in controlling and creating with your stereo system.
Take the ultimate step up in sound, without trading in a thing.


How To Trade Up Your Receiver, Tuner, Amplifier, Turntable, Cartridge And Speakers Without Trading In A Thing

Hitachi SR-1100 receiver


AM/FM Tuner Amplifier
No effort has been spared,no detail overlooked to make this one of the finest tuner amplifier available anywhere. From its FET equipped FM front end to its spring-loaded, one touch speaker trminal, every circuit and control has been designed with typical Hitachi fastidiousness. Accurate tuning is easy with signal strength and centre-zero tuning meters, and a muting control eliminates FM squelch. Further accuracy and clarity are guaranteed by ceramic filters and a time switching MPX decoder.

Auxiliary Circuits
Power and speaker (A, B) switch
Function switch, including muting switch
Mono-stereo switch
Loudness and High, Low filter switch
Tape monitor switch
Phono sensitivity switch
Pre-mainswitch
FM aerial attenuator
Headphones and Microphone socket

Specifications
FM Section
Frequency Range:  88 - 108 MHz
Usable Sensitivity:  1,6 µV
Total Harmonic Distortion
Mono :  0,3% (1 kHz)
Stereo :  0,8% (1 kHz)
Image Rejection:  85 dB
IF Rejection:  100 dB
Capture Ratio:  0,8 dB
Stereo Separation:  42 dB (1 kHz)
Signal-to-Noise Ratio:  70 dB
Alternate Channel Selectivity:  65 dB
Aerial Impedance:  300 Ω
AM Section
Frequency Range:  530 - 1605 kHz
Usable Sensitivity:  10 µV
Image rejection:  73 dB
IF Rejection:  76 dB
Signal-to-Noise Ratio:  48 dB
Audio Section
RMS Power Both Channel Driven: 
65 W x 2 at 4 Ω, T.H.D. 0,5%
55 W x 2 at 8 Ω, T.H.D. 0,5%
Frequency Response:  20 - 50,000 Hz
Power bandwidth:  20 - 30,000 Hz
Distortion:  0,05% (1 kHz)
Signal-to-Noise Ratio:
Phono  Low :  65 dB
Phono High :  70 dB
Aux :  85 dB
Damping Factor:  50
Input Sensitivity:
Phono Low :  1,8 mV
Phono Hgh :  4 mV
Aux :  125 mV
Mic ;  2 mV
Tape Monitor :  500 mV
Main In :  800 mV
Output Sensitivity Rec Out :  500 mV
Tone Controls:
Bass :  ±16 dB at 50 Hz
Treble :  ±16 dB at 15 kHz
High Filter :  -10 dB at 10 kHz
Low Filter:  -8 dB at 50 Hz
Loudness (Volume at -30 dB):  +10 dB at 50 Hz ; +4 dB at 10 kHz
Dimensions (W x H x D):  446 x 137 x 330 mm (17-1/2" x 5-3/8" x 13")
Weight:  12,6 kg (27,8 lbs)

JVC JL-F30 turntable

 Fully Automatic Belt-Drive Turntable
Features:
Fully automatic Lead-in, Repeat, Return and Shut-Off
Four-pole synchronous motor
Proven Belt-drive system
New gimbal support

Cost and performance. The relationship between these two factors has always been a headache to designers/engineers. At JVC our engineers tried to create -and did - a balanced turntable in the JL-F30 for any serious audiophile, using our own 4-pole synchronous motor and the proven belt-drive system. It's no surprise that it has a low wow and flutter of less than 0,06% (WRMS) and a high Signal-to-Noise Ratio  of better than 67 dB (DIN-B). With the fully automatic convenience, the JL-F30 offers more performance for less investment than other automatic on the market.

The JL-F30's fully automatic mechanism allows manual operation at any time during play. An oil-damped arm up/down lever (CUE) is provided, so that you can cue on any of the selections on a record, regardless of arranged sequences.

The 4-pole synchronous motor spins the aluminum platter through the linkage of a belt-drive system. Vibration is filtered out and speeds are kept steady against power voltage fluctuations or load changes. JVC quality control is evident throughout this unit. The unit also offers the benefits of a low-silhouette design, making it perfect for any home decor, solid cabinet construction. Parallel isolating Suspension and other features.
Specifications
Drive System:  belt drive system
Drive Motor:  4-pole synchronous motor
Speeds:  33- and 45 rpm
Wow and Fluttr:  less than 0,06%(WRMS)
Signal-to-Noise Ratio:  better than 57 dB (IEC-B) or 67  dB (DIN-B)
Platter:  die-cast aluminum alloy
Diameter:  309 mm (12-inch)
Tonearm
Type:  statically-balanced S-shaped tubular arm with JVC developed TH balancing system and with tracking force dial of 0,5 g/steps
Effective Arm Length:  220 mm
Tracking Error:  +3°35'; -0°43'
Overhang:  15 mm
Applicable Tracking Force range:  0,5 to 3 grams
Mountable Cartridge:  14,5 - 22,5 g (including Headshell)
Cartridge
Type:  Moving magnet MD-1025
Stylus:  0,5 mil diamond for DT-Z1S
Optimum Tracking Force:  1,5 to 2,0 grams (DT-Z1S)
Output:  3 mV (1 kHz)
Frequency Response:  10 to 25,000 Hz (DT-Z1S)
Separation:  better than 25 dB (1 kHz)
Load Resistance:  47 to 100 k Ω
Compliance:  25 x 10¯⁶cm/dyne (Static); 10 x 10¯⁶cm/dyne (Dynamic)
General
Power Source:  120, 220, 240 V 50/60 Hz
Power Consumption:  13 watts
Dimensions (W x H x D):  460 x 368 x 130 mm (18-1/8 x 14-1/2 x 5-1/8 inch)
Weight:  7 kg (15,4 lbs)