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





Onkyo TA-2058 cassette deck

The Integra Series
Onkyo's Integra sound is one that comes as close as possible to duplicating the abundance of energy and the richness of detail of a live performance. Whether you're seking to capture all the tonal colors that a symphony orchestra is capable of creating, or the synthesized, electronically amplified sounds of modern music, the cassette decks introduced here are designed to bring them to you with astonishing realism. They represent Onkyo's high technology achievements constantly refined through listening tests by experts. You'll have to operate and listen to one of these superb tape decks to understand Onkyo's dedication to excellence in the audio field; the live sound of the Integra Series.

Full Automatic Accubias with 5 Response Positions
Both the TA-2058 and TA-2048 Cassette Deck are equipped with Onkyo's unique Accubias system for fine tuning the recording bias to achieve the widest, flattest frequency response possible. On the TA-2058 , Accubias is completely automatic; the optimum amount of bias is applied for each tape type. There are aso 5 preset frequency rsponse positions so that the user can manually set the bias to obtain the desired sonic characteristics. Proper biasing is essential for high quality recording, and Onkyo has made great strides in bias accuray, automation and the elimination of guesswork.

4-Digit Real Time Tape Counter
A 4-digit LED displays the minutes and seconds elapsed since tape fransport was started or the time remaining. Instead of just a tape counter, the real time counter gives you the actual program time of the tape you're listening to. This means no more guesswork, for instance, about how much actual time is left on a cassette when recording. Locating a particular song or editing becomes much easier. There are a series of tape length selector buttons below the time display compatible with all standard cassette formats.

Other Features:
3-Motor, 3-Head configurtation with Special Hard permalloy
Silent tape transport with Micro-Computer Control
Auto Space Function
Automatic-Music Control System
Dolby B, C and HX-PRO
Two repeat modes
Two 10 segment, 2-color LED level indicators
Separate left and right microphone jacks
Rec/Play timer switch
Memory Play and Stop switch
MPX filter with on/off switch
Compatible with RC-5T remote control unit
Optional wood grain side panels (CW-K58) can be attached for added elegance

Specifications
Track Format:  4-tracks, 2-channels
Erase System:  AC erase
FF and Rewind Time:  90 sec. (C-60)
Wow and Flutter:  0,045% (WRMS)
Frequency Response:
Metal Tape :  20 - 19,000 Hz (30 - 18,000 Hz ±3 dB)
High Position Tape :   20 - 18,000 Hz (30 - 17,000 Hz ±3 dB)
Normal Tape :  20 - 17,000 Hz (30 - 16,000 Hz ±3 dB)
Signal-to-Noise Ratio:  60 dB (Metal, Dolby Nr Out)
Inputs [Sensitivity/Impedance]:
Line In Jacks :  [2] 60 mV/50 k Ω
Microphone Jacks : [2] 0,6 mV(600 Ω) /5,6 k Ω
DIN in Jack :  [1 EU models] 0,1 mV(1 k Ω) /2,7 k Ω
Outputs [Level/Impedance]:
Line Out Jacks :  [2] 500 mV (0 dB)/more than 50 k Ω
Headphone Jack :  [1] -/8 - 200 Ω
DIN Out Jack :  [1 EU models] 500 mV (0 dB)/more than 50 k Ω
Motors:  3 motor system, DC servo Motor x 1 , DC motor x 2
Heads:  Rec/Pb Special hard permaloy  x 1; Erase, Ferrite x 1
Power Supply Rating (4 types):  AC 120/220 V Switchable 50/60 Hz
Dimensions (W x H x D):  435 x 112 x 360 mm (17-1/8" x 4-3/8" x 14-1/8")
Weight:  6,1 kg (13,4 lbs)

Onkyo TA-2048 cassette deck

Onkyo Integra 3-Motor, 3-Head Cassette Deck

Special Hard permalloy
The 3-head design has some distinct advantages over the conventional combined Pb/rec format. Since the playback and recording heads are separate, the playback head gap width can be made narrower than the recording head so it can capture with greater precision the higher frequency sounds. For durability and improved metal tape compatibility the rec and pb heads are fashioned out of Special Hard Permalloy. This format also lets you monitor (from tape) what you.ve just recorded so you can fine tune and optimize the recording level. The 3-motor system achieves superb stability and reliability in tape transport. A servo controlled capstan motor is the ultimate in self-correcting precision, and the rell table motor further contributes to eliminating wow and flutter. The head block is moved into place by its own independent motor for optimum functionality and precision.

Silent Tape Transport with Micro-Computer Control
When tape transport begins, the head block is silently and smoothly lifted into position. Besides eliminating annoying start-up noises, this micro-computer controlled system avoids mechanical shocks that could cause misalignments of head azimuth and transport parts. Also, much less power is needed, so there's no need for oversized transformers in the power supply which might be potential sources of hum and induction noise.
Auto Space Function
This very simple but useful feature automatically inserts a 5-second silent space in the tape when the Auto Space button is pressed. Later, in playback, the AMCS automatic search system will detect these pauses electronically and stop the tape at just the right spot.

Automatic-Music Control System (AMCS)
This function allows you to skip forward or reverse to the beginning of the adjacent section of recorded music. The first 10 seconds of that section are played and then scanning continues, playing the first seconds of each successive track until the play button is pressed. With AMCS you can quickly search for the section of a tape you're looking for , or quickly scan the entire contents of a tape.

Dolby B, C and HX-pro
Conventional Dolby B reduces noise in the higher frequency ranges while the newer Dolby C does the same for the high and middle ranges where tape hiss and modulation noise, though less audible, can still degrade fidelity. The TA-2058 is additionally equipped with HX-Pro which constantly monitors the high frequencies in the audo signal and adjust the bias current for optimum flat frequency response. When recording music with a lot of high frequency peaks, HX-pro will automatically lower the bias to allow for the additional high range "headroom" required to capture these sounds without running into tape saturation and distortion problems.

Two repeat Modes
The single and full repeat modes allow you to repeat a single song if you like or to listen to a whole cassette side a second time.
Specifications
Track Format:  4-tracks, 2-channels
Erase System:  AC erase
FF and Rewind Time:  90 sec. (C-60)
Wow and Flutter:  0,045% (WRMS)
Frequency Response:
Metal Tape :  20 - 19,000 Hz (30 - 18,000 Hz ±3 dB)
High Position Tape :   20 - 18,000 Hz (30 - 17,000 Hz ±3 dB)
Normal Tape :  20 - 17,000 Hz (30 - 16,000 Hz ±3 dB)
Signal-to-Noise Ratio:  60 dB (Metal, Dolby Nr Out)
Inputs [Sensitivity/Impedance]:
Line In Jacks :  [2] 60 mV/50 k Ω
Microphone Jacks : [2] 0,6 mV(600 Ω) /5,6 k Ω
DIN in Jack :  [1 EU models] 0,1 mV(1 k Ω) /2,7 k Ω
Outputs [Level/Impedance]:
Line Out Jacks :  [2] 500 mV (0 dB)/more than 50 k Ω
Headphone Jack :  [1] -/8 - 200 Ω
DIN Out Jack :  [1 EU models] 500 mV (0 dB)/more than 50 k Ω
Motors:  3 motor system, DC servo Motor x 1 , DC motor x 2
Heads:  Rec/Pb Special hard permaloy  x 1; Erase, Ferrite x 1
Power Supply Rating (4 types):  AC 120/220 V Switchable 50/60 Hz
Dimensions (W x H x D):  435 x 112 x 360 mm (17-1/8" x 4-3/8" x 14-1/8")
Weight:  5,8 kg (12,7 lbs)

Heco Precision 400 loudspeaker


Heco precision Series loudspeakers feature a patented woofer duet claimed to ensure accurae bass response. For prcise midrange and high frequency sound, both soft dome midrange drivers and tweeters utilize a special polymer material made exclusively for Heco.
To prevent the effects of spurious vibrations, the acoustic suspension cabinets are built of particle board that is "five times more dense than usually used for speaker cabinets".
All models have two environmental contour controls, a nominal DC impedance of 8 ohms, and an efficiency control rated at 91 dB/SPL at 1 m/1W.

Specifications
Type:  3-way acoustic suspension
Power Handling:  120 - 200 watts
Frequency Response:  25 - 25,000 Hz
Impedance Nominal :  4 ohms
Crossover:  600 Hz / 3,000 Hz
Drivers:
LF :  300 mm(12 inch) Woofer
MF :  50 mm (2 inch) Midrange
HF :  19 mm (3/4 inch) Tweeter
Volume:  66,0 litre
Dimensions (H x W x D):  650 x 375 x 270 mm

Weight:  19,0 kg

Heco Precision 300 loudspeakers


Heco Precision Series Model 300 

Specifications
Type:  3-way acoustic suspension
Power Handling:  100 - 170 watts
Frequency Response:  25 - 25,000 Hz
Efficiency Control Rated:  91 dB/SPL at 1 m/1W.
Impedance Nominal :  4 ohms
Crossover:  700 Hz / 3,000 Hz
Drivers:
LF : 245 mm (10 inch) Woofer
MF :  50 mm  (2 inch) Midrange
HF :  19 mm (3/4 inch) Tweeter
Volume:  41,8 litre
Dimensions (H x W x D):  500 x 310 x 270 mm
Weight:  16,5 kg